Holley Dominator EFI hard starting after warm up

[DOOM]

Originally Posted by GregWeld

I thought this car was pro built?

F@$KING BALL BUSTER!

[DOOM]

We ruled out vapor lock. Nothing comes close to any heat . When the car starts its a monster . The throttle response is crazy ,idles like a dream. Josh at RS put us in the right direction. Will let you know how it works out .

[andrewb70]

This is a simple tuning issue. The combination of IAC Park and cranking fuel are what determines starting AFR. There is also a Fuel Prime adjustment in the System ICF. Fiddle around with those parameters until you get to what it likes. I find cranking fuel values just above fuel table values in the idle area work best for hot start. Then adjust IAC park accordingly. You can also fiddle with cranking spark advance, but I'd leave that as last resort.

Andrew

[572Camaro]

I have been following this thread but am only familiar with FAST XFI systems.
Based on your hot start issue, i believe Andrew nailed your issue.
I would first ensure you have the specified fuel pressure with key on, engine off.
Then work on your "cranking fuel" which controls air/fuel ratio below roughly 400rpm.
Then IAC park position should be tuned to ensure it is opening enough.
Just curious, are you throttling the gas pedal during cranking to get it to start when it is hot? Does it help? That could be an indication that Andrew is on the right track.
Please let us know what you find out

[Vegas69]

Even I didn't have my distributor locked out on my solid roller big block. With the right bushing and springs, you can achieve similar results to the module and plenty of initial advance. The same GM mini starter lasted the entire time I had the car.