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Top Swap Won't Run Right



Do you have a stock PCM that you can try. The other guys earlier in the thread may be on to something.

Do you know how to check the injector duty cycle with a DVM?
 
What MAP sensor are you using? I hope you switched over the the 2 bar L67 MAP otherwise the PCM thinks you have a 2 bar when you are running the stock GT 1 bar.

I am almost 100% on that is what it is. I bet if you throw your GT PCM on the car it will idle better.
 
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I was hoping the MAP was the answer as suggested by pure2sin. Damn!

Before you put the old PCM back in make sure you check your grounds, battery and alternator. That's about all I can think of.
 
Well after almost giving up for the day, (stock pcm did the same) I grabbed my gt idle air value and swapped them and guess whet she purred like a kitten
 


Oh man! Great!
Since it didn't set a code I'm wondering if there is something wrong with the PCM. The return signal from the IAC to the PCM has to be within a strict set of parameters. If no code then WTF.

I'll have to remember this one!
 
I know. If I disconnected it and started it, it set right away. But I think i'm going to order a zzp pcm unless someone here has one better
 


Nope. I let it run for about a hour and nothing. I can shut it down and restart it but if it sits for couple hours it just cranks
 
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