i just insatlled my skunk 2 IM and JDM ITR header with 2.5 cat now my car idels kinda high and then goes down to bewteen 1000 rpm to 0000rpm i was thinking i just need time for the ecu to reconize the new parts but i just wanted to know if it might be other issures. pic would help of the setup of the IM too
P.S. i have a 94 LS teg

 

Sounds like your intake manifold gasket it leaking. Spray some carb cleaner around the head and IM, if it fixes it, you've got a leak.

Also check your throttle body gasket.

 

did u reset ecu

 

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yeah i took out th e battery the whole timew we were doing the install. is tehre other way of reseting the ecu. i even chnaged all the gasket.

 

rpms move up and down over and over?

 

i just took out the ecu fuse and now it ok but one thing i forgot to mention was that the throttle cable is not bolted where it should on the Skunk2 cus the bracket is touching the ATS air tep sensor, i was told i have to buy a ITR throttle cable bracket cus it extends long to the side...at this moment the rpm is at 1.5 when it used to be a 1 before the mod and ecu reset. so am thinking once i put the brackete and adjust the cable it should be fine. but input on my ideea is much appreciated.