LT1 idles issues
Thread Starter
On The Tree
Joined: Nov 2018
Posts: 193
Likes: 18
LT1 idles issues I'm having an odd idle issue. Car is a 95 obd1, lt1 6 speed. Engine has a cc503 cam and supporting mods. stock heads, SBE, stock intake. It has a 52mm throttle body from summit racing. The car has ran fine and idled fine with this setup for months. Recently I disconnected the battery to do some electrical work and when I got it running again it started fine. Idled for 5 mins to warm it up and drove off. After moving and driving in gear then coming to a stop the engine goes down to 500rpm for about 10 seconds then idles up to 750-800 where it normally is when the engine is warm. Every initial start is fine. Its only after moving in gear then stoping it ides down. The TPS tested fine, .67v to 4.5v. I took out the iac and cleaned out the throttle body and make sure the idle passage was clean. The iac was at 51ohms, within spec. Otherwise the car runs fine. I looked in the tune and it is still set at 1200 cold/800 hot. what am I missing? TIA
