Cooked PCM?

[TheWizardofOz]

So I had just installed an oxygen sim and I went to clear the codes. Usually the way I do this when I'm in a hurry is to start the car, remove both PCM fuses, turn off the car, and then insert the fuses. Well, today I wasn't paying very much attention and accidentally reinserted the fuses with the car running. When I turned off and then started the car, it was very hard to turn over, and then it idled very low and erratically. I revved the car a bit and then it died. During this the reduced engine power light was on. I waited a minute and then started the car again, and it was a little easier to turn over, but still not what it used to be. It was able to rev, but it was extremely rough. The reduced power light wasn't on anymore. I turned it off and repeated, and it was slightly better, but still seemed a a little rough. Did I mess something up permanently?

Thanks in Advance,
Mike

[TheGr8Schlotzky]

Re: Cooked PCM?

The fuses are still good?

[TheWizardofOz]

Re: Cooked PCM?

Yes the fuses are fine. It seemed to be getting better, maybe everything's ok?

[Bird_Of_Prey]

Re: Cooked PCM?

What year car?

[TheWizardofOz]

Re: Cooked PCM?

2000.

I just took it out for a drive around the neighborhood, so nothing hard. For the first few minutes it was running extremely rough, but after that it seemed ok. I didn't get on it real hard, so I don't know for sure. I'll take it out more if I have time later, but I'm still open to ideas as to what I did.

[Bird_Of_Prey]

Re: Cooked PCM?

My initial vote is MAF. Are you setting any codes?

[Firebirdkid96]

Re: Cooked PCM?

I second that vote...

[TheWizardofOz]

Re: Cooked PCM?

I haven't set any codes yet, but like I said I only took it around the neighborhood a few times.

[Firebirdkid96]

Re: Cooked PCM?

For future reference, i wouldn't reset your PCM that way anymore. Since the fuses didn't fry it might be possible that the surge in power caused your pcm to need to be reflashed?

[TheWizardofOz]

Re: Cooked PCM?

Yeah, I know I shouldn't be doing it I'm just stupid :slap:. It's just easier than disconnecting the battery and I don't lose my radio settings. I think from now on I'll do it the right way, using a ODBII reader. By reflashed, do you mean cleared again or similar to getting it retuned with a full flash? If everything stays normal while I'm driving should I assume it's ok or that there is a lurking problem?

To the others who said MAF, is there any way I can test that if no codes are being set?

[Bird_Of_Prey]

Re: Cooked PCM?

Yup, unplug the MAF and see if it runs better.

[Firebirdkid96]

Re: Cooked PCM?

unplug it. and by reflashed i mean get a full flash back to stock....but if it runs okay now then it may have just needed a few cycles to reset itself

[TheWizardofOz]

Re: Cooked PCM?

I didn't get a chance to drive it today but I will definately take it out tomorrow and see how it runs, both with and without the MAF. Thanks everyone for all your help, this forum is great. :tup:

[zpwn06]

Re: Cooked PCM?

Have you tried the normal pcm fix? unplug the battery for 30 min.

[TheWizardofOz]

Re: Cooked PCM?

I'll try that too, thanks