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Procharger tune, horrible idle..

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Old 02-21-2010, 07:29 PM
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m1afan
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Default Procharger tune, horrible idle..

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?
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Old 02-21-2010, 08:14 PM
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BruceH
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Double check all of your vacuum lines.
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Old 02-21-2010, 10:03 PM
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JasperGT
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^That's what I was gonna say! It seems to clear up a lot of people's problems when they supercharge.
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Old 02-21-2010, 10:46 PM
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MELLOWYELLOW06
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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.
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Old 02-22-2010, 01:32 PM
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Originally Posted by MELLOWYELLOW06 View Post
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.
+1

The can tunes are more or less crap. Dyno tuning is a must when you go to an FI setup.
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Old 02-22-2010, 02:31 PM
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Torch Red GT
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did u check for codes?
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Old 02-22-2010, 04:09 PM
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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.
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Old 02-22-2010, 05:37 PM
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Originally Posted by m1afan View Post
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.

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.
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Old 02-22-2010, 08:24 PM
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I installed a VAC/boost gauge tonight. VAC stays steady at around 20in at idle. Does that sound right to you?
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Old 02-22-2010, 08:27 PM
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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?
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