QuestionQUESTION: how do i repair this problem
ANSWER: Hi Wayne,
The code is saying that mis-firing is occuring on most if not all of the cylinders. That could be due mnay different things. While you didn't say which year/make/model is involved I would focus on things that affect the fuel/air ration (mixture) to begin with. Here is how I answered recently to a situation where the code persisted even though the mechanic ("he") had already done a compression check and replaced the spark plug wires and tried several other diagnostic tests but to no a avail:
"The manual gives the following possibilities, in addition to the wires which were replaced:
fuel pump or filter (unlikely as regards the filter), injector harness connectors, ignition coil circuit, spark plugs, mechanical problem (but compression test would probably have shown that), contaminated fuel, water in fuel. pcm power ground connections, injectors, restricted exhaust, intake restriction, the pcm itself, the evap emission control system, the exhaust gas recirc {egr} valve system (this is something I would certainly recommend that he check, as if the valve sticks ajar it will definitely cause misfiring). So suggest that he lube the valve stem with WD-40 and move it back and forth with the tip of a screwdriver in the slot to be sure it is moving to a dead-stop via internal spring-action); air gap at high rpm's, other mechanical (?), and damaged trigger wheel (something to do with one of the engine postion sensor (?)). The parenthetical items are my remarks.
Many of these also might set a separate code so he might not need to concern himself with them. But the egr valve would be high on my list."
If this is a '96-'00 2.5L V-6 then the egr would be highly suspect as Chrysler has issued a technical service bulletin suggesting replacing that valve with an improve design one.
If you have further questions be sure to tell me the year/engine/model that you have.
Roland
PS Please 'rate' my answer, and where you see the question about 'volunteer of the month' please consider a 'yes' answer if my response has been helpful. Thanks
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QUESTION: same question the vehicle is a 2003 chrysler town &country 3.8 liter the problem started when my daughter bottomed out in a hole in a field ?thanks, wayne
AnswerHi Wayne,
My first thought is that the exhaust system may have a pinched pipe so that the exhaust gases are not flowing freely and when that happens it back up in the combustion chambers and causes a miss. That would bed where I would first look. If I think of another way that bottoming out could interfere with the engine function I will let you know.
Roland
PS Please 'rate' my answer and consider a "yes" for volunteer of the month. Thanks
