Hey all, I am having ignition problems. I had my SES light read and it was a code - P0300 - PCM has detected Random Multiple Miss Fires.

I have changed my Opti, had the Coil Checked, and put a new Ignition Module in and still no luck.

This is what the car is doing. When you start it when it's cold you don't notice really any problems, but I can since I drive it everyday. But after a little bit of driving it (about 5 minutes) it start to kick and sumble. You notice it more when you are accelerating. I have checked the wires already, but I am going to pull the plugs and check them and the wires again incase I missed something. Also the plugs and wires are only a little over 2 months old and the wires have no signs of being burned or anything. If there is ideas on what might be the problem please reply, thanks.

 

check that cylinder 5 wire.. that was the cause of my po-300 code, had excactly what u describe....

 

check all the basics:

fuel pressure
dirty fuel injectors
a short in a spark plug wire
compression

 

Thanks for the replies so far. Any other ideas? Just want to know all the possibilities in case there are any others that haven't been said.

 

sounds like maybe the problem starts once you are in closed loop. i would check sensors...my car did the same thing you are saying yours is doing and it was o2 sensor related. the only code thrown was multiple cylinder missfire.


hope this helps