Thread: Heavy Isolated Misfire Under Load

We thought the initial issue was a bent valve due to the missing rocker pedestal.

No case learn its a 97.

You can case a 97.

PCM knowing TDC is the pcm knowing TDC. It's an optimization. Just because the KM is removable doesn't mean it can't benefit from a learn.

How do I do a case learn then? Is it the same as other years?

When ever I tried it on the aero force I didn't think it worked.

Yeah..same as all years.. get up to temp.. tell it to do it.. rev to limiter and poof..

Reason why I suggest it is you seem to have ruled out almost everything. When you did the rockers.. one thing you should have done is turn the motor with ignition off to retorque the rockers. I have seen a few cars that ran like poo after a swap etc. Not many..but a few. No real info.. no real codes.. nothing seemingly out of whack. I case learned and it was magic. So the assumption would be that the pcm didn't have a good bearing on where TDC was ...even though there's a few different ways it determines it.

http://www.grandprix.net/forum/ubbth...t&Number=92035

Regardless what they say in the thread about 97...I'd do what Bill says.

I'll try it.

Do I get any kind of confirmation that it did the case relearn?

Depends.. I do with HPT.

I'll try it again. But I don't think its working.

S/c

No way in hell another stock cam is going in if that's it.

Sell a stock cam.... Kyle.. you should be ashamed of yourself.

Nope. I've been real busy... And it's cold