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MotorHead Lon · 11-30-2010, 04:29 PM

I dont remember the code, I think I have it written down I will look for it. The first engine was a 350, I did not change the ECM. I used the junkyard engine's intake manifold, and it looked like it had never been off. I have checked for vac leaks and found none.

After swapping engines I did install an open element air cleaner, however the truck ran the same with or without an enclosed aircleaner.

The truck is a factory 350 V-8, with a 5 speed manual transmission. I havent messed with the IAC.

11-30-2010, 04:29 PM	#4
MotorHead Lon Registered User Join Date: May 2007 Location: Alabama Posts: 241	Re: 90 350 TBI wont idle down. I dont remember the code, I think I have it written down I will look for it. The first engine was a 350, I did not change the ECM. I used the junkyard engine's intake manifold, and it looked like it had never been off. I have checked for vac leaks and found none. After swapping engines I did install an open element air cleaner, however the truck ran the same with or without an enclosed aircleaner. The truck is a factory 350 V-8, with a 5 speed manual transmission. I havent messed with the IAC. __________________ 88 Chevy C1500, step side, LS swap. 98 Crew Cab Dually, tow rig. 03 Dodge Neon. ECTA Ohio Mile record holder. Last edited by MotorHead Lon; 11-30-2010 at 04:31 PM.