3800Pro Forums banner
1 - 2 of 2 Posts

·
Registered
Joined
·
15 Posts
Discussion Starter · #1 ·
Hi all
I have a Pontiac Grand Prix GTP
Many mods are done:
Colder spark plugs
GTX cold air intake and hood
3" Downpipe
Ported supercharger
Portet manifold
42 Lucas injectors
and a ZZP PCM. Since then I've got more KR than before.
Before I had a Intense PCM got KR only with full throttle
But now I have half throttle and KR is here (about 5)
Why this? Do I need another PCM if I changed the injectors?
Or can the other PCM witout the injectors programmed learn this?
There was a tip I must contact Brian if I have KR......

thanks for your answers
 

·
Registered
Joined
·
75 Posts
I don't consider myself an expert at this by any means, however the first thing that comes to my mind is what size supercharger pulley are you running with those mods and did you drop sizes with the new injectors?

You definitely need a tune that supports the larger injectors. It will not run right, maybe not at all if you switch back to your old intense pcm without the injector programming. I would definitely get in contact with Brian. That is a lot of KR your seeing
 
1 - 2 of 2 Posts
Top