m1afan

I finished installing a p1sc kit on my 07 GT. I loaded the tune with the diablosport and it runs awful. It fires up, but then almost dies off. Drops to 300-400 rpms and picks up again. When driving the idle drops way down for a while, picks back up at every light. I'm not looking to hit boost before dyno tuning it, but I want it to run decent so I can limp it to the tuner. Anyone have this problem and how did you fix it?

BruceH

Double check all of your vacuum lines.

JasperGT

^That's what I was gonna say! It seems to clear up a lot of people's problems when they supercharge.

MELLOWYELLOW06

Check your lines but also go for a professional dyno tune catered to your car. You spent all this time and money for all this power, now spend a few more and get it tailor made to YOUR car and squeeze out as many ponies as possible. I know I pulled out almost 40 HP extra over the canned Paxton tune that came with the kit.

CutterWolf

+1

The can tunes are more or less crap. Dyno tuning is a must when you go to an FI setup.

Torch Red GT

did u check for codes?

m1afan

Thanks for the replies! I'm gonna check the vacuum lines tonight. I'm going get it dyno tuned, but I thought that the blower has to have a 500 mile break in period before you can pound on it. Is this not that important? I'm only concerned with it pre-tune so I can get those 500 knocked out.

BruceH

The condition you described in the original post is exactly how my car behaved when I had accidentally disconnected the brake vacuum assist during a clutch change.

m1afan

I installed a VAC/boost gauge tonight. VAC stays steady at around 20in at idle. Does that sound right to you?

m1afan

I also hooked up a wideband A/F gauge. After warming up the idle a/f was bouncing between 15.2 - 16+. Would a vac leak make it run that lean?