2005 pt cruiser misfires at low rpm
Have your plugs and wires checked for replacement:)
Spark blugs or wires are the usually the root cause.
I replaced new spark blugs. After one month I have some misfire, so I install new low cost wires, all ok, but after one month I got same fault again.
So I buy original wires, but same fault again =(
Well, I take a closer look and I found a faulty insulation of spark blug.
Here is a photo of it:
http://www.ptcruiser.fi/ptgalleria/albums/userpics/tulppavika.jpg
and I replace new spark blug, now it is working...
Trouble Code: P0301
Cylinder No. 1, 2, 3 or 4 Misfire Detected
Trouble Code Conditions: Engine is running; atmospheric pressure, fuel level, battery voltage, engine speed, engine load are above minimal predetermined specifications; the engine is not in fuel cutoff and intake air temperature and coolant temperature are within normal operating ranges; there are no DTCs relating to ECT, CMP, CKP, MAP or IAT Sensor, to Crank rationality, to Crank Sensor Learn invalid, or to System Voltage. If total misfires detected are greater than 7% during the first 1000 rpm, or are over 3% after the first 1000 rpm, or are 25% during any 200 rpm with suspect cylinder misfire counter more than 80% and no other cylinder misfire counters above 80%, this DTC will set. The MIL will flash after first trip occurrence and will be steady after second trip.
Possible Causes:
Fuel system problems existErratic CMP or CKP Sensor signalsIgnition system problems existEngine mechanical problems existPCM has failed
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