I have the Holley HP EFI kit for LS1. This is on an 03' LQ4 with a cam and heads done. I am also using a cable driven tb off an 04' van with a factory 01' truck throttle cable. Problem #1
Turn the key and engine fires great cold.
Once warmed up I could not get it restarted...
I had to turn the IAC way up from the baseline LS1 tune BASELINE My Change
With the IAC under 78%, the engine would not start.
Any help? Problem #2
The directions to the kit say the IAC should be between 5 and 15%
when warmed up. The IAC will not go under 70%
when warmed up. It says I should adjust the throttle open, but how do I do that? It is a factory van tb and throttle cable. Is this important or necessary to proceed? I checked the cable and it allows the butterfly to fully close and open so is working properly.
The only variable I see is the van tb has a small hole drilled (1/16") in the bottom section of the tb which looks factory drilled. My previous truck dbw throttle body does not have this.
Any ideas? Problem #3
Engine idles great and I have a total of about 30 minutes idling on it. I can slowly ramp up the throttle (when parked of course) to various RPM’s. Whenever I lower the RPM, no matter how gently, it will die
when it reaches around idle speed. I am not sure what is causing this or if it is related to my issues above.
Any help or advice would be great.