joseph1971

I have a 95 z28 slightly bigger cam than the lt4 hotcam...3 angle valve job, heads ported and polished...car runs fine except when coming to a stop...when slowing down the idle is fine but when i completely stop it will idle low ( 4 to 500 rpm) and it will either idle back to correct rpm or cut off...i have changed TPS, IAC,MAP sensor... had to change plug for map sensor and MAF sensor, also I have a friend with a shop and he checked for codes and no codes show up. Have been dealing with this problem for about a yr and any help would be appreciated. Thanks Joe

bw_hunter

Was the PCM tuned for these mods?

joseph1971

yes it was tuned and about two months ago it would idle fine at stops everytime...then
I had a leak in my heater hose and I took the battery out to change the hose, fixed it... put battery back in and it would not idle right at stops