I have a a 2001 Dodge Grand Caravan ES 3.8 and the check engine light is on

2001 DODGE

152,000 MILES

KRYSTALBURKE19

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I went to auto zone because my check engine light was on and it they did the test thing and the test says
Troubleshooting P0302
OEM Brand:Domestic
Definition
'a'aCylinder misfire detected-cylinder number 2
Explanation
'a'aThe powertrain control module monitors the
'a'acrankshaft speed and has detected a misfire
'a'acondition
Probable cause
'a'a1- Ignition system fault-spark plug(s),ignition
'a'awires,coil
'a'a2- Vacuum leak
'a'a3- injector fault
'a'a4- high or low fuel pressure

I replaced all the spark plugs
and i just replaced the fuel filter and it is still running really hard and the eheck engine light is now off so do you have any sujustions on what i should do? Please e-mail me asap :) I appreciate it very much in advance

Jul 5, 2012 at 12:09 AM

CARADIODOC

CERTIFIED EXPERT
34,306 POSTS

The spark plugs are only one member of the team. You could also have an injector problem although that is very rare on Chrysler products. That cylinder could have low compression too or a valve is not fully opening. Don't overlook the spark plug wires.

Except on diesel trucks, you will never solve a running problem on a Chrysler product by replacing the fuel filter.

A compression test is a good place to start. Next would be to switch the injectors between cylinder number 2 and one other one to see if the misfire moves to that other cylinder.

Jul 5, 2012 at 12:20 AM