Holley 4150 HELP needed fast......

[protour73]

Engine is a ZZ4, Edelbrock RPM Air Gap intake, Pro Systems 4150 carb, I had a real rich condition at idle when I first got the carb last summer and switched the idle air bleeds from 70's up to 78's to lean it out more at idle. Idle mixture screws are out about 3/4's of a turn at all for corners, and the idle transfer slot is set at .020 exposure.

So over the winter I changed from an MSD E-Curve distributor (could NOT dial that dang thing in to save my life) to an MSD 8360 with a Blaster coil (no MSD box). I also changed from a 4 hole 1/2" carb spacer to an open 1/2" spacer.

The only other change was on the fuel pump from 90° NPT fittings into and out of the fuel pump to Fragola Pro Flo 90° fittings.

So I set the base timing at 14° and attempt to fire up the car and it starts but it won't stay running. If you feather the throttle a lot it will struggle to hang in there around 1500-2000 rpm but eventually will die. Being that it sat for the last 4 months over the winter I didn't want to get too radical with it until I got some oil circulating.

SO.......where do I go from here??

I am ultimately trying to get this dialed in by Friday for the Heidt's track event here in suburban Chicago. Sure glad I took vacations days on Thursday and Friday!!