P0300

[jonny72888]

So I changed my plugs about 5k miles ago. I had a scan tool hooked up to it today and saw in my history I had a few misfire codes but I never had a check engine light. I just put in a new pcm a few days ago. So my question is could the plugs cause this? I did the wires at the same time. I used acdelco.

[txab]

Did you perform a crank relearn when you installed the new PCM?

[jonny72888]

Did you perform a crank relearn when you installed the new PCM?

 

 

No. I did not get a CE light. But after not seeing any gains from the new pcm I did a crank relearn. I have not check to see if the codes came up yet. The light would not stay on I did not even know about it until I went to do the relearn.