In the morning my car cranks up good with a slight skip after it fires. But after the car gets warm I half to open the throttle to get it to crank. After the car is warm it takes 6-7 turns before it will fire with the throttle open. The car has Vortech with 2.87 pulley, 550cc injectors AAM fuel system, Split sec box, JWT cams, built motor.....ect. It just seems like some times the car fires right off then other times in takes several turns with the throttle open. If I try to crank the car after it is warm and don’t open the throttle it will kick a muti cylinder misfire code. Do I just need to adjust the values in the surrounding cells on the split second fuel map at the 0 psi and 0 rpm cell? Or is it some thing else like a crank pick up sensor........??

 

i got the exact same problem with you. couldnt solve it yet

 

What is your fuel pressure set at?

 

52 psi.

out of curiosity, how can it be fuel press. related while knowing that it does only happen after the car is hot.

 

Fuel line too hot allowing the fuel within it to vaporize and delay starting..??

 

Yeah mine does the same thing too. My cars goin down to altered for a bigger turbo and a few other things, so ill have them check out that problem too. Could possibly be some fouled spark plugs or somethin like that, im not sure but ill find out.

 

I got return fuel system so that's out of question.


My spark plugs are in good condition but maybe they are too cold. What plugs do u guys havE? I got HKS 2 step colder iridiums.

 

Your mixture is too rich at start up. Try lowering your fuel pressure to 42psi, or adjusting the cells in the sub 1000rpm range. The reason it fires clealy when cold, is the engine requires a richer mixture on cold start. Once the engine is warm, it requires a leaner mixture, and it is stumbling on you.

 

i'll try that right away.