I have a 1989 Formula 350 that has had a hard start issue for a long time. Here is the scenario:

If I first start the car (after its been sitting for a bit), it will fire right up and run fine at idle etc...
If I run it for a while, a minute or even a few seconds and shut it off, then, immediately try to start the engine again (dosent matter if cold or warm), it will crank but not start. If I let it sit for at least 5 minutes, then attempt to start, it will fire right up again and run fine at idle etc.... (like nothing is wrong).

Right now, I have to plan my stops to ensure that the car sits at least 5 minutes to ensure a restart.

Here are the stats of the car:
1989 Formula 350
"Stock" TPI Motor/Intake manifold/Heads
Edelbrock headers
A/C deleted
Battery relocated to trunk area
SLP dual ram air intake system modified to fit MAF
Mallory plug wires/ignition system looks good
ECM has the Hypertech Thermomaster chip for 1989 350TPI application)
160 degree thermostat
TPS set at .54
IAC set at minimum air rate: 450/500 rpm
Adjustable FPR set at 45 psi with vac line off/dosent lose pressure under load/bleeds off pressure slowly if engine is off after a few minutes.
Changed fuel pump and filter recently (primes for two seconds when key is turned on, before turned to ignition start)
No trouble codes present.

I know that I need to have a new chip burned to delete Smog (still on the car at the moment), A/C and modified for the cars current engine intake and exhaust etc... applications as well as tuned for optimal performance (since the car is really drinking gas and feels a little loaded up/hesitant during normal driving). I just want to tackle this annoying starting issue before I move forward.

BTW, would a fauly EGR cause this issue?

Please chime in with any ideas as to what can be done to fix this issue.

Thanks, Steve

 

TTT. Searched for other related topics with no solutions yet.

Any experts in this realm, please let me know what you think. Thanks again, Steve Z