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03-08-2009
ok so i have a 2000 gtp with 3.4 pulley with supporting mods and some extras and my car is how it sould be until it hits 100 mph then it drops down to half boost....i have replaced my supercharger belt and idler and tensioner pulley i cant figure it out any answers please help thanks
03-08-2009
Hmmmm what pcm do you have? Sounds like your PCM is pulling boost for some reason. What are you scanning KR and other stuff with? Does it feel like it misses? There has to be other symptoms other than just going to half boost.
03-08-2009
Stock PCM files that I've seen start pulling boost at 116. It's possible that yours is different, though, pull the lower vac line and unplug the solenoid and see if it changes.
03-09-2009
im running a zzp pcm and no it doesnt miss i also have new plugs and wires so that shouldnt be it, it pulls hard all the way to 100 then goes to half boost, and it only does it from a 0-100 if i put the throttle down at 75 at 100 the boost wont drop
03-09-2009
k ill try unplugging it and see what it does
03-10-2009
I think kylegtp99 or whatever had the same problem a while back, except his was from 0-95. Maybe he'll see this thread and chip in.
Last edited by Smokin2000gtp; 03-10-2009 at 11:28 PM.
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