When the car is at a stop sign or a red light it shakes
Inspect pugs for propper gap, cracks... check wires for arching and replace as needed. Verify firering order is correct.
SOURCE: how to fix 2002 pt cruiser rough idling
Check on intake silicon gaskets, upper and lower. About $18 at autozone
SOURCE: pt cruiser rough idling
Replace your Fuel Filter and see if it does not Help. Even a Partially Clogged Fuel Filter will cause this Problem.
SOURCE: 2005 pt cruiser... it sputters and won't idle well
That is the first thing i would suggest you do. Replace all the spark plugs and the plug wires. Those 2 things are the most commen thing that cause misfires.
SOURCE: 2001 PT CRUISER MISFIRE CYLINDER 2
Do you know how check the engine codes?
Turn the key 3 times and the codes will be displayed where the odometer number is displayed.
If the code is 302 it is spark plug mis fire.
It could be a bad fuel injector.
SOURCE: My 2003 PT cruiser's engine light came on, then
Find your air mass flow sensor in the stiff collar of the air ducting immediately after the air filter. Have the engine running and disconnect the plug to the MAF. If this makes the car run evenly again you need to replace the broken MAF. The misfire on plug 4 I think is a downstream event of the MAF not sending the right info to the ECU and consequently not providing the right fuel / air mix to the engine
you would need to do a running test. but if its worse with new injector. then it can be the dispack fault. it feeds the spark plugs. have seen some were the unit has leaked. and made like a cement on the shaft that is the inside of it come out and dropped down the shaft. also the rubber will go white like water marks. check them to make sure they are the same if it does look like what ive said change it. they are not dear to replace.
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