CataclysmGT

Ever since the supercharger install, when I go to start the car after its been sitting a few hours, its cranks a few times, then sounds strange trying to start. The last few times it was required totry twice. Some black soot from the exhaust also puffs on the first hard start. I have noticed more fouling on the exhaust as well, but this could be due to the richer A/F of being supercharged.

Is starting a tuning issue?

sidmanic

You might have a bad injector but you would think that the PCM would throw a code. Don't know what mods you've done to the fuel system. Do you know if the check valve is still in the pump assymb?

TOMBSTANG

man seems liek you have had nothing but bad luck since the s/c install. hope its nothing major

CataclysmGT

Fuel system is the GT500 system from the Whipple HO kit.
Its odd, because the first 10 or starts after the S/C, therewere no hard starts. Now, its like clockwork.....leave the car for a few hours and it pauses for a sec, or requires a 2nd go at her.

As for the injectors....looking at fuel trims bank vs bank, they are so close to one another, eliminating that theory we think.

All will be solved in July. Adam/ST Motorsports is building me a rocket. New engines are good things....hahaha.

TOMBSTANG

good luck with the rocket.

what are you doing with your saleen rims when you get your forged ones???

MustangGT0405

I have soot on my exhaust too, but no trouble starting.

Hate to harp on it, but did you ever get the FRPP tuner? I think that would clear up all of your trouble's till you head over to ST.

CataclysmGT

You know, I haven't got the FRPP tuner yet. I think I'll order it today, swap for the smaller pulley and then use that until ST's magic can be worked. Not that Justin's tune was bad, it was spot on after he adjusted it a bit (his A/F was so flat.....can't even be called a curve. )
At least the FRPP tune will ensure I don't blow it up....haha.

moosestang

I'm still looking for someone that's blown a motor on the frpp tune. I don't think it's possible after seeing the dyno run on M0dular Fords where the air/fuel ratio was 16:1 or something, because they forgot to hook up one of the fuel pump drivers. That engine should have blew, but the tune pulled timing and killed power like crazy.

Mygt500 had a similar starting problem, but I think his was just when the engine was cold. Mine would stumble a little after sitting for 8-10 hours, but cleaning the MAF sensor seems to have cured it.

MustangGT0405

Good idea, I think that will cure alot of your problems.

MYGT500 - had a cold start issue I think that was tune related.

Good luck with the build.

CataclysmGT

On a semi related note..........those with relocated IAT's.....do you observe the temp rising fast WOT? It barely changes for me, even after 5-10 seconds WOT.
Perhaps the intercooler works better then I expected.