Ok so I put a ls6 intake on my 98 z28, but now my idle is all messed up and likes to rev up to about 3000 rpm's but always is different. I heard that if I reset my computer and drove it the compter would relearn the idle because of the more air flow of the ls6. I did that and have drove for over 300 miles and its still doing it. Any ideas or advise. I am thinking I might have missed the memo about having to get it tuned or something like that after doing this. I dont know, but I am open for advise. Thank you all so much.

 

Check over everything, make sure all of your connections are connected and tight. Sounds like you have a vacuum leak going on somewhere.

 

Vacuum leak.. Check your brake booster line and stuff in the back of the intake.. PCV connections, etc.

And FWIW: the LS* computers relearn within seconds. It's not like the L98 OBD1 computers that needed a full drive cycle.

 

What did you do about the 98 coolant crossover tube under the intake? Did you also remove the green plastic pieces taped to the KS wiring harness?

 

yes I put the coolant lines under the intake, but I dont remember anything about the green plastic pieces.

 

I did mine yesterday. No green plastic pieces on mine either.