Heya guys. The 383 is finally together and we fired it up today for the first time. She fired up and seems to be running well except the idle is high. She should idle at 875, but is idling around 1500 - 1600 RPM. The map sensor reading with the engine off is .99 and with the engine running is between .3 and .35. We assumed a vaccum leak, but all the hoses are new, we've checked and rechecked them (and again). We've sprayed brake cleaner around the intake with no change. What else could cause a high idle like this?
Details:
95 Z28 M6
Golen street/strip 383 shortblock
Ported stock heads and intake (stock valves)
Stock throttle body (until I can get an ASM unit)
42 lb injectors
stock fuel pressure regulator
Comp Cams XFI cam
Long tube headers
emissions deleted
K&N FIPK
Stock MAF
PCMforless tune
Other than the idle she is running well, no leaks, no smoke, fires right up. What else am I missing?
.Rick