On top of this, folks have to worry about fuel in the oil, and the cold start rattle (failed cam phasers that then stretch the timing chain). Another frequent symptom of carbon buildup on the Ford 3.5L turbo engine is decreased power. If either the distributor or the ignition coil creates a weak spark, it can cause misfires. Here's How To Fix It, 5 Symptoms Of Bad Gas In Your Car and How to fix it, 8 Causes Of Low Engine Compression and How To Fix It, 5 Symptoms Of A Bad Engine Control Unit and Replacement Cost, P1326 Code Meaning, Causes, Symptoms (& How To Fix), 5 Symptoms Of A Bad Engine Control Module and Replacement Cost, P1131 Code Meaning, Causes, Symptoms (& How To Fix), Car Wont Accelerate But RPMs Go Up: Causes & Fixes. In any case, the first generation EcoBoost produces 355-380 horsepower, depending on the vehicle. Always starts and idles perfectly, even passed its MOT. 1. Some vehicles have a separate ignition coil on every spark plug, while some cars have one coil pack with an ignition wire to each spark plug. The bracket was removed, and loom insulation damage was visible. The engine from the second generation is used in the following models: With that background information out of the way, lets get to the point. Within about 5 minutes of leaving the pump the engine was struggling. The official Ford website can be found at http://www.ford.co.uk/, Fiesta 2013 1.0 Ecoboost misfire and or hesitation under light throttle. Symptoms The signs of a leaking turbocharger system start with a lack of power or random misfires. If your car engine sounds unusual, its possible that your engine is misfiring on every cycle. Display as a link instead, Here is a more detailed list of the most common cause of engine misfires: 1. With a false high fuel pressure this leads to lean running and the fuel trim controls ramp up to compensate. Clues so far is that it doesn't like colder temperatures e.g. It is, however, inherent in owning a twin turbo, direct injected engine. Then, go backwards to cylinders 2,3,4,5,6 on the driver's side. Jan 23, 2021. ouguru said: 2011 F150 FX4 with 3.5L Ecoboost developed a severe misfire at 65k miles. However, you have some control over how well the twin turbo EcoBoost engine is maintained. The 74-page lawsuit was filed by five plaintiffs, Robert Reed, Stacy Coppock, Craig Morford, Kelli Morford, and David . The worst condition of exhaust and converters. On naturally aspirated engines, spark plugs frequently last over 70,000 miles, while ignition coils typically last about twice that. To determine if you have low compression, remove the spark plugs. Check light blinking, car acceleration slow. 6 Symptoms of a Bad Ignition Coil (& Replacement Cost), 5 Signs of a Bad Intake Manifold Gasket (& Replacement Cost), Low Fuel Pressure Symptoms, Causes (& How To Fix it), 8 Symptoms of a Bad Fuel Injector (& Replacement Cost), 8 Causes of Low Compression in a Car Engine (& How to Fix), How to find a Vacuum Leak & How to Fix It (8 Easy Steps), Car Jerking When Accelerating? Advertising - Ford introduced the 3.5-liter EcoBoost engine in the Lincoln MKS, MKT, Ford Flex, and Taurus SHO in 2010. Symptoms of 3.5L Ecoboost misfire are usually related to heavy carbon build-up on the ignition coil. March 10, 2022 in General Ford Related Discussions. With closer inspection it was clear that there was contact between the loom and the square edge of the bracket. https://www.youtube.com/watch?v=0J83RZi3eCE, Hi thanks for your reply. Since the 3.5L Ecoboost in my Expedition has 79,000 miles on the original spark plugs, I decided to replace all (6) spark plugs with new ones. Before delving into 3.5 EcoBoost problems, its necessary to establish some context. The check engine light is one of the most common symptoms of bad spark plugs. Vacuum leaks are a common cause of an incorrect air-fuel mixture and are fairly easy to check, so you want to start there. The lawsuit alleges that the leaking of . Check the fuel pressure and compare it to the manufacturers specifications. Every engine suffers from some degree of oil blow-by. These misfires often occur under load from the engine, such as when you accelerate quickly. Ive been driving the Expedition for a month now with the new plugs, and havent received a misfire code. With the hood popped, standing in front of the vehicle, looking at the engine the cylinder numbering starts at the front left (passenger . Although mostly reliable, a Ford 2.7 EcoBoost engine has problems including carbon build-up, oil pan leaks, and spark plug and ignition coil issues. Try better fuel, see if it goes away. The plugs have been used for no more the 2k miles. Finally, when the timing chain stretches, it can throw off the ignition timing, resulting in drivability problems. I had a hard time describing what it was, but now this is the clearest description of . On Christmas morning 2019, I began pulling away hard from a traffic light, when suddenly the 3.5L Ecoboost in my 2016 Ford Expedition stumbled a couple of times. Manage Preferences - Thanks for the great information passed on. Hello allhopefully I'm not regurgitating info herebut since my searches led me to different bits and pieces of my solution, I figured someone else might benefit from it all being condensed into one place. Regards Its a powerful engine with 355 to 647 hp and plenty of torque. I have a problem with my Opel Monza GSI fuel injection 1.6 car only revs up to 3000 then back fires and the engine light comes on we change the fuel pump but still nothing any help please, Hi I have a ford cortina 2l i fit al new parts coil carburetor sparkplugs plugwers dustubetor points condensor and suer of timming slil cant start please can somebody tell me what to do. Zain here 5. . The upstream O2 sensor, HP fuel pump and fuel rail pressure sensor have been changed. Its not recommended to drive with engine misfires. More often than not, your engines computer will be able to detect bad spark plugs in your F150. Read more: Low Fuel Pressure Symptoms, Causes (& How To Fix it). New plugs areNGK Spark Plug SILZNAR8C7H (93593) same NGK part number as the originals. You may also consider simply replacing the spark plugs. 1. Although the engine appears the same on my car there is no sensor on the low-pressure side fitted. when overtaking. If youre experiencing misfires, heres an easy way to determine whether the problem is with the spark plug or coil. Emerald Gypsy 1949 Ford Bus Converted Motorhome, 1995 Ford E-350 Airstream B190 Motorhome 44, 1972 Ford Courier Twin-Turbo LS Drag Truck, Rough Rider 1988 Ford F-150 Class 8 Show Truck, Disconnect battery (since Ill be unplugging the coils and injection pump, I decided to disconnect the battery). I turned around and headed home, and after a short distance, the check engine light stopped blinking, and the truck seemed to run smooth again. As mentioned above, the ECM controls the engine timing, and air/fuel ratio. Fuel Injectors Can Get Clogged. Misfire Codes: A bad timing chain tensioner or guide also causes the check engine light to illuminate. If youre unlucky, it could be due to poor compression, which can be very expensive to repair. The first day I had my truck, changed plugs and boots.had to it misfired like mad on the way home and knew it had to be done..got a extra 1k trade in for taking it that way and then drilled hole, also cleaned the maf sensors, ran like a champ and still does. The loom runs below this bracket and in my case there was a rusty stain on the loom. danielsan8787 Started February 20, By The garage thinks its running lean at light throttles as the fuel trim values are going high, hence the misfire or hesitation. It also causes the plug to misfire. I wouldnt have thought a UK dealer would make the same mistake but Im almost sure they did. engine may exhibit various engine misfire symptoms accompanied by diagnostic trouble codes (DTCs) P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 stored in the . Still #1 misfire. Therefore, if you notice that your car engine idles rougher than usual, it could be a sign of a misfiring engine. More precisely, it appears to affect primarily 3.5 EcoBoost engines manufactured between 2010 and 2014. The 3.5 EcoBoost engine from the first generation utilizes only direct injection (DI), which means fuel is sprayed directly into the cylinders. You may also notice problems such as the engine stalling at idle or an uneven idle that jumps up and down. Just a theory. My scan tool isFoxwell NT530 Full Systems Scanner for Ford, which is a small stand alone hand held unit with access to all vehicle modules. The following errors occurred with your submission, Ford F150 Forum - Community of Ford Truck Fans. Misfires Rough idle Stuttering / hesitation Power loss Check engine light (misfire codes) Prevent ignition coil failures Some believe it is due to insufficient maintenance and oil changes, or to the use of 20w oils, which are too thin for the engine. I am debating on whether to go with another oem turbo or get an aftermarket higher performance turbo. There are several misfire related trouble codes. Often, spark plugs are to blame, as their lifespan is significantly shorter than that of ignition coils. . If the timing chain completely fails, additional damage to the 3.5 EcoBoost engines is possible. I hope you enjoyed this article and now have the expertise to diagnose engine problems like misfires and fix the problem with your car yourself to save some money. Remove the insulated cover over the injection pump to get to spark plugs # 5, and #6. We both feel that the the low range fuel pressure sensor reading a constant 5 volts is worth investigating, but as we can actually find a low pressure sensor (under the bonnet) we are none the wiser. and you'll notice engine misfires, startle, and low millage. Had the DTC read as P0301 (#1 cylinder misfire) and went to my local Ford dealer, bringing a copy of Ford TSB 12-10-19. I just realized that 1999 toyota Camry is running on 3 cylinder By reading your article I'm without any doubt that you're a professional. Started February 26, 2015, By The main symptoms of an engine misfire include: Here is a more detailed list of the most common signs of engine misfires: When an engine misfire occurs, you may feel a strong or light jerk coming from the engine. Time and the winter will tell. This includes misfires, power loss, and a rough idle, among other things. However, using PI has a few additional benefits, most notably assisting in the prevention of carbon build-up. To be fair to the Ford 5.0 Coyote engine, we believe the 3.5 EcoBoost is a clear choice if offered. Driving with a misfiring engine may not be dangerous right away, but over time it will wear on your engine and you can potentially damage the vehicle. Issue Severity: SEVERE - Stop driving immediately. OK ForScan up an running and after much testing I can see the fuel rail pressure sensor raw voltage signal intermittently dropping to zero volts for a few mili-seconds then recovering. This is what causes the misfire. There are also many vacuum lines on the intake manifold that can leak, giving the same symptoms as a bad intake manifold gasket. Inject not getting fuel , so cylinder does not fire , so get misfire code. Aftermarket Products, Reviews & Installation, Suggestions, Comments & Questions about the Forum, 2006 F150 5.4 Sputtering - New thread CONDENSED. cheaper than replacing the valve? The most common signs of bad ignition coils in Ford F-150 are engine hesitation when accelerating or loss of power, rough idle, misfires, excessive fuel consumption, check engine light illuminates, and sometimes hard starting. I have not noticed any slack in the joint. Before we begin, lets jot down a few quick notes. My problem is, that it starts shaking when I accelerate to a certain speed. Fuel related . But how do you tell if your engine is misfiring, and what could be causing it? i have hyundai accent 2012 model ,manual gear.my car RPM fluctuates even after i changed my coils ( 3 coils are good and one coil current was leaking so i changed only that coil),plug ,air filter etc.kindly suggest what is the remedy for this problem. Ford 1.5 EcoBoost Engine Problems: The 4 Most Common Problems, ignition system such as spark plugs and ignition coils, 10 Best Digital Calipers In 2022 Expert Review, 10 S9 Charging Cable Of 2022 Reviews & Comparison, 10 Projectors For Laptops Of 2022 Reviews & Comparison, 10 Brother Mfc L5900dw Of 2022 Reviews & Comparison, Top 10 Porter Athletic Equipment Recommended By Editor, 10 Harry Potter Proclamation In 2022 Expert Review. There is a red locking tab on the plug: Slide the red tab back to unlock the plug. . You may also notice that the engine does not sound like it used to, and that your car has reduced power and fuel efficiency. Naturally, that engine receives some upgrades over the standard 3.5 EcoBoost to accommodate the increased power. Some vehicles have a separate ignition coil on every spark plug, while some cars have one coil pack with an ignition wire to each spark plug. . If the check engine light is on, there should be a trouble code stored that needs to be checked with an OBD2 scanner. This is why you HAVE TO DRILL the 1/16" intercooler weep hole. Matilda Magnetic build 2019 6.5' bed crew cab fx4 heavy tow.. Do Not Sell or Share My Personal Information. Additionally, the use of twin turbos provides an abundance of tuning potential for those looking to get the most out of their engines. As we talked about earlier, the engine needs the right air-fuel mixture, spark, and compression to fire properly. With the ignition coil out, you can remove the spark plug using a 5/8-inch spark plug socket, extension, and ratchet. We used Mitchell 1 to look up the information for setting a P0300. The garage needs some thinking time so they haven't physically worked on it in the last few days, I need to chase for updates. Ford also added port injection to the second-generation 3.5-liter V6 twin turbo engines. This is why you HAVE TO DRILL the 1/16" intercooler weep hole. In order to get to the #5 and #6 spark plug, youll have to unplug the harness connector on the injection pump. Diagnosis: A cylinder 3 misfire can be caused by anything from faulty spark plugs to low engine . Remember, the root cause of ecoboost misfire is the condensate buildup from the intercooler. As fuel poor pressure measurement and control was one of the key symptoms this was almost certainly the smoking gun. I did not find any evidence of carbon tracking on the plugs I removed. Additionally, engines are prone to a variety of other issues that we are not discussing particularly as they age and mileage increases. Terms of Service - Remove the plug on the ignition coil of the cylinder youre working on. To missmy06 I havent seen a positive post out of you yet and Im sure any dealership would be happy to trade in your current truck for another 06 and down and probably the finances would not change so go for it. Its my first scan tool which has been useful but is limited by my knowledge and the small screen. Push in the red plastic lock tab to secure the power plug. Additionally, turbocharging and direct injection assist the 3.5 V6 in remaining fuel efficient and emission-free. It can also be caused by fuel-related issues such as a faulty fuel injector or a bad fuel pump. By This identifies the root cause as the Charge Air Cooler/CAC when it . At 96,000 Miles. My 1997 Sebring run good , as long as I stay under 65 . This video may help. This is a lot of Ford and Lincoln EcoBoost engines. Under hard acceleration (i.e., boost) or at highway speeds, an intermittent stumble and misfire reportedly can occur during high humidity or damp conditions. Here's my top pick motor oil for the Ford EcoBoost cyclone engine. Now the symptoms are less noticeable there are no codes. jsk Your previous content has been restored. The engine in modern cars uses many sensors to measure everything in the engine to make them as efficient as possible. When one or more cylinders do not fire properly, the engine will become unbalanced, and this can cause severe vibrations inside your car when accelerating or idling. 2015 ECO 3.5 Misfire-Tried everything, I think. FORScan can access Mode 6 but I don't know what TID's are available for your car. Is it in the fuel tank as part of the pump module? The engine started fine and has been driving perfectly for over a week now. Myself and many others might be happy you did, but we all would miss the joy and happiness you bring to this section All - this is a VERY WELL DOCUMENTED fatal flaw in the ecoboost. Kinda forgot the power the 3.5 eco boost had when it was running rightat least no cops were nearby lol. Carbon tracking is where the spark fires between the top of the plug and the base, across the ceramic shell. An old trick that mechanics often use on car engines with separate ignition coils is to switch the spark plug and ignition coil to another cylinder. Its plastic, so you dont want to pry on it or you may break it. It accuses Ford of selling cars with cracked heads, seals not sealing, and catastrophic engine failures. Failure of any of these sensors can cause an incorrect air-fuel mixture to enter the engine, which can cause the engine to misfire. If your VVT solenoid is experiencing issue due to a faulty oil control valve, you may notice a reduction in engine performance, as the VVT system may not be able to optimize the engine for peak power generation. If you lose power while driving on a busy road, this is a safety hazard. There is a Technical Service Bulletin (TSB 14-0180) for the 2011-2013 Ford F-150 that suggests that you check the spark plugs for carbon tracks, and replace the plugs and boots if carbon tracks are found. This includes misfires, power loss, and a rough idle, among other things. Getting good spark. The advantage of port injection is that fuel is washed over the intake ports and valves. by Aungsty Thu Mar 23, 2017 6:38 pm. in both cases, the engines were significantly under the mileage recommendation to replace the spark plugs. A high-quality shop vac and walnut media shells are required for this job. Started 4 hours ago, By Often, it is simply normal wear and tear, but early problems are possible. However, when only DI fuel is used, there is nothing to assist in cleaning the ports and valves. I had an F150 and an Escape both do exactly these same things. In my case cyl 2 4 6 8 on a dakota 4.7. I would like to congratulate you on the simple way of explaining this article on misfire troubleshooting. This is fairly standard procedure for any engine, and the Ford 3.5L V6 is no exception. Started February 5, 2013, By Carbon deposits should not pose a serious threat to the 3.5 EcoBoosts longevity. Turbo engines require more maintenance than the average engine. For example, if you see a trouble code like P0300 or P030X, it means that the ECM is detecting a misfire on a specific cylinder, and you may want to start checking the spark plug or ignition coil on that cylinder. Tom Harbid. The 3.5 EB comes in two distinct generations, which we will discuss briefly below. Walnut blasting should be performed every 70,000 to 100,000 miles as preventative maintenance. Fortunately, checking the fuel pressure in your car is fairly easy with a manual fuel pressure gauge, and worth doing if you suspect low fuel pressure. Simply because these issues are classified as common does not mean they affect a large percentage of 3.5 V6 engines. So the car in now at a local garage and they are struggling as well. Therefore, the first thing you want to do when diagnosing misfires is to check the trouble codes with an OBD2 scanner. 5. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. Ecoboost 1.0 - Difference Between 100Hp And 125Hp Version ? I used a flat blade screwdriver behind the coil to help wiggle it a little to get it out. For complete cylinder combustion to occur, the engine needs three important things, and that is the correct air/fuel mixture, compression, and spark. I think the Fuel Pump Module is at the Fuel Tank, I'm not sure where it measures the pressure though. Cookie Policy - A design defect allows coolant to leak into the cylinders of the 1.5L, 16L, and 2.0L EcoBoost engine. MechEng, However, numerous other factors can cause rattle. How to Spot Carbon Buildup. 3.5L EcoBoost Timing Chain Rattle Symptoms & Fixes, Ford Fuel Pump Driver Module Failure Symptoms & Solutions. The plugs should be fine, then. Any thoughts, is the fiesta 1.0 ecoboost prone to wiring loom faults, ecu faults, multiplug pin corrosion, water getting places it shouldn't? If you cant find the issue elsewhere, its definitely worth taking a look at your fuel injectors. 8. Puzzled. If it is too high or too low, you need to inspect the components of the fuel system such as the fuel pump, fuel filter, and fuel pressure regulator. Ignition coils should last approximately twice as long. Condensation can build up and be trapped in the intercooler on certain F-150 models with the 3.5L EcoBoost V6. I used a small screwdriver to press down on it as I slid the plug off. Jiffy Lube Vs. Valvoline Oil Change: Differences & Which Is Better. The plugs were changed at 40k as I was aware of a slight hesitation back then, no improvement, the car is at just under 50k now. I changed my plugs and gapped them to the .028 and replaced the boots about a month ago. If you cant find any problems on the spark side, its time to look at the air-fuel mixture. SMax auto is slow to shift down to 1st gear. Nonetheless, turbo technology has advanced significantly over the last few decades. random misfire and cyl 4 misfire. If I do, Ill update this page. However right now this is what I've got since I wanted to spend $20k not $35k. You can expect a cost of $200 to $500 to fix a misfiring engine in most cases. Carbon build-up is simply a disadvantage of relying solely on direct injection. Spark Plugs And Ignition Coils Issues. Tighten the bolt in the clockwise direction with the 8mm socket and a 1/4 drive ratchet until it is snug. Not sure how to test injectors. Double check that the spark plugs are tight before moving on to the next steps. What do I do? To refer to spark plugs and ignition coils as a issue is probably not accurate. Avoid over tightening the new spark plugs to prevent from stripping the aluminum threads. 4) Poor Engine Performance. Ford had a PCM reflash for these cars after the first few model years for the computer as to not trip a code on cold start misfires. northern_nubie NOTE CYFS-12-YT4 replaced the original CYFS-12-YT3 spark plug. Maintain the Ford EcoBoost engine properly, and it will almost certainly reward you with a dependable, enjoyable driving experience. After a bit of discussion we realised that my scan tool and the garage scan tool both indicated that the low range fuel pressure sensor was showing 5 volts which sounds more like open circuit than an an accurate reading. Started 3 hours ago, By Carbon buildup, on the other hand, can result in power loss and a variety of other drivability issues. I haven't done anything with the turbo bypass valve so far assuming that at these very light throttle loads the turbo can't be contributing much if anything. A blown head gasket can cause low compression. Paul 56 The known common problems of the Ford 1.5 Ecoboost engine are: The Problem Of Overheating Has Been Exceeding. Additionally, timing chain issues appear to be more prevalent on F-150 models than on others. Ford 3.5 TT V6 Carbon Build-Up Symptoms. Truck ran pretty good even picked up about 1.5 mpg, then the last couple of weeks it has become a tired dog. Certain DI engines can even run their entire lives without any valve cleaning. Most likely, you will be unaware of a gradual loss of power over a period of several years. Unfortunately, low compression problems are often caused by worn parts inside the engine, which can be very expensive to fix, so youll want to inspect the other possible causes first. Learn more here: How to find a Vacuum Leak & How to Fix It (8 Easy Steps). Another possible problem that can cause misfire fault codes on only one side is low compression. Its critical to establish this for a reason. Copyright text 2021 by driveceladon.com. Unexpected misfires, check engine light illuminations, rough idleall of these symptoms could indicate that your EcoBoost's timing belt needs to be replaced. This disturbs the air-fuel mixture, which may result in the 3.5 EB misfiring. There is a red locking tab on the plug: Changing transmission fluid usually takes care of torque shudder, Torque converter usually isn't bad, just needs new fluid. A random misfire means is that a misfire is detected . Ford has also issued bulletins, indicating that they are fully aware of the timing chain issues. 9. The most common situation where you will feel misfires is in high gear, low RPM, and with the gas pedal to the floor. Started Thursday at 09:49 AM, By Not too shabby in terms of longevity. Contact Us - When an engine misfires, it can cause reduced fuel economy, engine damage, and a loss of power. An engine misfire is an event that occurs when one or more of the engines cylinders fail to ignite the air/fuel mixture during the combustion cycle. Code says multiple misfire's . Drop In Engine Power: . We have both independently looked for a low pressure fuel sensor but can't find one, other fords have low pressure sensors near the inlet to the HP fuel pump but this car only has a fuel pressure damper. What Are The Symptoms Of Engine Misfires? A class-action lawsuit just filed says that the 1.5-liter, 1.6-liter, and 2.0-liter EcoBoost engines leak coolant into cylinders. The carbon deposits can cause un-even amounts of air to enter to cylinders. This is primarily a problem with first-generation engines. Ignition coils have a life expectancy of 25,000 miles if were lucky. This leaves a characteristic carbon track on the insulator. Overly rich running engine. Thus until reading your wonderful explanation, I could not figure out why my computer was calling my burnt valve a "misfire", which I think is a bit misleading of OBD2. However, it depends on how serious the fault is and what specific repairs need to be made. Youll also want to inspect the spark plugs and ignition coils. (Heres How To Fix it), 7 Best Spark Plugs Review & Buyers Guide, Car Losing Power When Accelerating? I have a different engine to your one but for comparison my Low side pressure is normally around 400-450 Kpa. Keep your Ford F150 truck running strong. When it reaches normal speed it quit shaking. Yeah the misfire is only on cylinder 4 according to the AP and about 2 weeks ago it began. If youve checked all the things above, but still cant figure out whats causing the misfires in your engine, it might be worth taking the car to a professional mechanic instead. Could it be a cv joint problem? Otherwise, its primarily labor associated with gaining access to the intake ports. Jun 30, 2021. READ MORE: 15 Types of Car Sensors (& What They Do). The socket should have a rubber insert or a strong magnet to securely hold the plug in place. Zain from S.A, I have a bmw e30 320i 1989. VVT has the ability to generate more power or save more fuel depending on the phase of the camshafts. But with all the added power I'm experiencing, as well as the renewed tranny response, I have to figure that will all carry over to making towing easier. Ford 2.7 EcoBoost Spark Plug & Ignition Coil Symptoms. Labor should cost less than $100. MAF and air filter look to be clean and dry. The truck is setting p0302 and p0305 under heavy acceleration. This is what causes the misfire. Turbos lead to high cylinder pressures, which in return stress the entire ignition. 3. Well discuss some of the most common issues with the Ford 3.5 EcoBoost V6 in this article, as well as its overall reliability. Ford 1.6 Inline-4 Timing Belt Change. Upload or insert images from URL. Aug 11, 2020. Any no improvement. but I don't feel or hear any misses . Get at least 20% off selected Ford parts on eBay View parts on eBay now! Remove the plug on the ignition coil of the cylinder you're working on. Changed the crank sensor the other day as a precaution as the last two cars I have owned have needed crank sensors in mid to later life. Carbon deposits can result in cylinders receiving an uneven amount of air. This makes the 3.5 EB an excellent engine for towing and fun around town without requiring full use of the engines RPM range. Push a new spark plug into the spark plug socket. By understanding the causes, symptoms, and how to fix it, you can keep your car running smoothly and avoid expensive repair costs. Also make sure that the correct viscosity of oil was put in as the wrong "weight" of oil can make the VVT malfunction. As a result, the cylinders of the 2.7 EcoBoost may experience inconsistent air delivery due to restricted airflow.