Got codes for misfiring cylinders 3,4,5,6. replaced camshaft position sensor. got new codes for misfiring cylinders 4 and 5. changed plugs, checked coils, cylinder 5 was bad so I replaced it. not getting anything from cylinder 4. bought harness connector that clips onto coil pack. (sorry don't know the correct name for part.) I have no idea how to replace wires.
It's pretty basic on this. Test your clip by plugging it into the coil first, and make sure that it is the correct one. If yes, you need to simply cut the old plug off and connect the wires to your new one (in the right order) with a simple but connector sold at any auto shop/parts store or electrical shop.
SOURCE: no spark
I had the ignition module go bad on mine. Bought a new one at advance for 130 bucks. Problem solved.
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.
SOURCE: 99 cougar v6 P0352 misfire cylinder 3 and 4 replaced igntn coil..
Had the same problem, car was misfiring on cylinder 3 and 4. replaced wires, plugs, and ignition coil. still misfired on the same cynlinders. turned out the main engine wiring harness plug in was coming loose. spent well over $150 on the unneccesary repairs and ultimately fixed the problem wit a $3 bag of wire ties to hold the plug in...
SOURCE: 2003 Chevy Venture misfiring
The injector is a good possibility, although you should check for spark in the wire first, as the electrical is the weakest link in the system. Put a spare plug in the end of the wire with the plug resting on metal, then have someone crank the van to see if you have spark that far, test and replace spark plug, (do not get shocked!) then look into a new injector or a good cleaning.
SOURCE: 2004 Audi A4 misfire
it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps
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