Question about 2008 Ford F-150 SuperCrew

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2008 f 150 engine misfire and flooding

My truck is misfiring and flooding itself out. It will barely idle and fills the cab with fumes. I've changed both cam sensors, spark plugs, coils and boots. What should I try next?

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  • Ford Master
  • 2,166 Answers

Carb service would be a good idea

Posted on Apr 22, 2014

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

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  • 36 Answers

SOURCE: Random Misfire on 2 & 3

I had a problem with a chevy with random misffires on all cylinders. It was the computer. Fords have very few problems with there computers. Does the check engine come on? Maybe have it scanned. 

Posted on Dec 12, 2008

chuck943
  • 783 Answers

SOURCE: engine code p0307 cylinder #7 misfire

It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.

Posted on Feb 05, 2009

  • 1 Answer

SOURCE: Have a 2003 Taurus, 3.0 engine that has a misfire

did you check the injector pulse on that cylinder and it also could be the pcm , i had a taurus and a sable with good coils stop firing 2 cylinders and it was the pcm ,the code it gave was secondary coil but changed the pcm and it worked fine

Posted on Aug 29, 2009

  • 115 Answers

SOURCE: Have an 06 F150 5.4l 3v engine. Random misfires.

The best advice that I can give to take the truck and have it hooked to a computer for diognostics. If you changes all the items listed, then it has to be a computer problem.

Posted on Mar 10, 2011

  • 1 Answer

SOURCE: 1997 ford f150 cyliner 7 misfire

After replacing the coil, plug and wire. The injector is working properly so I would say that you have a burnt exhaust valve. Get a cylinder leak down test or compression test to confirm this at a reputable mechanic.

Posted on Mar 04, 2013

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------
While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
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http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

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Hi i have a 2001 chevrolet 1500 4.3 with code po300 multy miss fire what do i need to look for did tune up wires coil cap button plugs fuel filter trans filter seafoam in the vac sys wile driving i...


I'll assume you can feel the engine misfire by the engine idling rough or "looping". I've had a lot of experience with chevy's "phantom" problems with engine idle,stalling and error codes. This would be the easiest approach to start with. Disconnect the battery for at least 30 minutes to an hour. Reconnect the battery and start the engine. It should idle rough, disconnecting the battery will literally erase the learned idle settings. It will take between 15-20 minutes running in "park" to relearn idle settings, should default to factory settings.You'll need a scanner to erase all the stored error codes to see if the problem reccurs. Another approach would be to check the altenator output and battery voltage, the computer needs a minimum amount of dc voltage to operate correctly. I've been through the filter changes, injector power flushing, fuel pumps, injector rail pressure testing, coil packs, MAF sensor cleaning etc. Its been my experience with 98' and newer chevy trucks, its usually something simple. The ABS light is the one that throws me off, that tells me its electrical. I personnaly would start at the battery-altenator verify voltage. Check PCV valve these were a problem chevy had a technical service bulletin on these. An old school trick, start the engine and let it idle, take a can of carb cleaner and spray around the intake manifold gaskets. if theres a vacum leak the engine will gulp the carb cleaner and stutter briefly. I've had the misfire code on my 2001 4.8L ext. cab in the past. It was always electrical, throttle body, EGR valve related. some cases its the engine crank angle sensor. Consider checking the fuel pressure regulator, on the V-8s its mounted on the fuel rail.

I got rid of my 01' Silverado and traded it in on a 07' 4.8L ext. cab, before i did that I looked under the hood. They've eliminated a lot of the fuel and emission control devices that had all of us scratching our heads and paying through the nose to diagnose and correct. I hope this helps provide some direction, we've all shared your pain at some time.

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Engine misfire first 1000 rpm, engine flooding out, check engine light is on but flashes when in motion, scanner shows system too lean bank 1 and 2. shows multiple cylinder fault codes.. (FORD F-150...


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