thewafflesareburnt

iTrader: (2)

So...I supercharged my 08 2.2 and it runs fine other than a slightly rough idle and at wot I have major power loss. The car bucks and stutters at exactly 3500 rpm. I assumed spark blowout so I gapped plugs to 0.030 and the issue persists. I can't find any vacuum leaks either. The car will pull at 3/4 throttle fine it is only WOT. Any ideas?

06blackbalt

iTrader: (3)

what intake do you have on it?

thewafflesareburnt

iTrader: (2)

zzp supercharger kit intake with zzp tune so it should be tuned for that

06blackbalt

iTrader: (3)

yeah it should be, any codes at all?

thewafflesareburnt

iTrader: (2)

nope no codes. Starting to think maybe fuel filter?

06blackbalt

iTrader: (3)

maf clean? try to get a log of it and have someone look at it

chevygirl2006

Zzp tune. There's your problem. And what pulley are you running to have a .030 gap?

thewafflesareburnt

iTrader: (2)

Maf is clean. It's a 3.1 pulley and I had initially gapped the plugs to .035 but decreased it because I thought it was blowout. I have been emailing back and forth with zzp and we cannot figure out what it is. Even if it's a not so great tune it shouldn't cause this

07blackg5

iTrader: (8)

See if anyone in your area has hptuners. If you could get a decent log while replicating the issue, it would be much easier to diagnose.

thewafflesareburnt

iTrader: (2)

I don't know anyone with a cobalt let alone hptuner. I replaced all injector seals and took everything off down to the manifold and redid it just to check and it made no difference. At this point it must be in the tune.

chevygirl2006

Well who's idea was it to supercharge if you have to access to hptuners? Lol Were you going to rely on the zzp tune forever? It's always good to have a tuner either local or at least have access to hp tuners so a tuner can email you a tune or fix it/adjust it when need be. Get your hands on hp tuners and contact James.

thewafflesareburnt

iTrader: (2)

Thanks for the helpful advice I'll go spend $500 I don't have

chevygirl2006

I wasn't trying to be rude. And what I meant was try tracking down someone with it already. Never said go buy it.

07blackg5

iTrader: (8)

keep an eye out on here and ebay. you can score some pretty good deals on used hpt. all you need is 2 credits

thewafflesareburnt

iTrader: (2)

Was the connection at the throttle body car runs fine now I'm an idiot

06blackbalt

iTrader: (3)

Lol glad you found it

07blackg5

iTrader: (8)

Still waiting for videos