72Spitfire
Member
Hey all, I have a problem thats been driving me crazy. Car keeps stalling and or wanting to stall at idle. Only when it is at running temperature. No issues when it's cold. I have to feather the throttle at stop lights. It has a lightened flywheel but I don't think thats causing my problem. Replaced MAP sensor and this did not help. Cleaned IACV valve which was filthy and re-installed, not a change at all. I know it could be alternator but the alternator is brand new. Gas is clean and fresh. New plugs, wires, cap and button. Throws no CEL, runs great other than the low idle / stall problem and gets stellar gas mileage (32 to 34 mpg.) Timing is correct. Engine has 490 miles on a fresh OEM rebuild. Valves need adjustment as they are noisy, but still seating. It's weird, it will idle down to about 1K for about 2 seconds, then drops to 500 or so and either catches itself and idles up to 1000 again or stalls.
Fuel vaporization issue?
Fuel pressure issue?
Vacuum leak?
Any other ideas?
Fuel vaporization issue?
Fuel pressure issue?
Vacuum leak?
Any other ideas?