Question about 2008 Ford F 150 2WD
My f 150 is misfiring real bad and flooding itself out. It will barely idol and when it does, the cab fills with fumes. I've changed bot cam sensors, spark plugs, all coils and boots. An idea on what to do next?
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Posted on Jan 02, 2017
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
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
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
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
SOURCE: 1998 Ford Explorer, 4.0 SOHC No
You are at thhe right trail what controls spark is coil pack crank sensor sparkplugs and plug wire but the most important is power . I mean 12 volt connections and ground This includes checking fuses you need a simple volt meter doesnt have to expensive or fancy just to pick up 12 volts let start with fuses in the engine juction box (there not mark to what it belongs to) make sure none are open. especially fuse 19 and 24 , next go to the crank sensor make sure the tabs are snuggly on now to the coil pack there is a red and light green wire this comes from ignition and feeds 12 volts at the coil pack measure that voltage is it 12 volts if not correct it this is from ignition switch ( you can make a tool that feed 12 volt with a wire and a fuse in series and attatch it to battery and the primary wire this is known as hot wire) next go to the ECM wiggle the wires see if that get a connection going if not go back to the ICM here are the wire you are to measure the tan light green, this is from ECM and it is pulsed it measure 5vlts to 0 volts switched then measure the tan orange the same thing 5 volts to zero,then tan white again 5vlts to zero. any one of these 5 to zero fails you fix is the ecm
Posted on Aug 21, 2011
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