Need some help
 

hey, i need some help/input. lately my car's been really jerky whenever it has boost. If it's boosting at around 5 psi i can feel it jerking, but if i'm at 10-15 psi, it's not that jerky but not as fas as it should be... i just had a big boost leak fixed about 2 weeks ago. I'm wondering if i have another one already? Because it doesn't jerk at all when the turbo doesn't kick in.

RE: Need some help
 

Turbo surge due to over boost? Bad clutch?

RE: Need some help
 

what would cause it to overboost?

RE: Need some help
 

1) cracks in the line between the wastegate and the turbo.
2) after market BC or N75valve.
3) 15psi could be over boosting a old KO3.

RE: Need some help
 

Oh I see, thanks for the info Beer. That line between the wastegate and the turbo... do you mean that tiny little hose that goes from the n75 valve to the FPR? I took my ecs-tuning n75k valve off and put the stock one back on yesterday. That helped a tiny bit but it still does it... this 'surging' that is.

If it was the clutch slipping then I would feel the jerkiness all the time right? Since it only does it when there is boost I kinda ruled out the clutch. Is that a safe assumption?

RE: Need some help
 

its probably a vac leak or a bad dv man, check your dv see if its workin properly

RE: Need some help
 

If you search under my name I had/have the same thing. Mine surges between 0-5 psi. I think it has something to do with using the green spring in the Forge007. When I used the other springs I didn't have the surging, but I also wasn't boosting nearly as high. With the green spring the car can hit 21psi, with the blue/red it only hit 15/12 psi @ wot.

I think its just something you have to learn how to avoid. Over the past month I have learned how to avoid it, mostly by driving faster :D.

RE: Need some help
 

badluck: My Bailey DV is only a few months old. They're supposed to be pretty strong right? I hope my DV isn't busted already.. How do I test it?

north: so your car surges too.. but you just sorta deal with it? Maybe I'm picky but I just think it's really annoying. With the Bailey DV I boost around 16. 21 psi, thats alot of boost! and you have a stock k03 right?

RE: Need some help
 

Yeah K03, GIAC chip, N75H, swisscheezed the airbox. Cleaned my TB and MAF - actually helped.

Yeah I just sort of deal with it until I figure out why its doing it. I was doing a lot of reading on AZ about the surging and with my green spring in the forge it seems normal. So really I don't know what to do about it. When I do my timing belt I am going to take my whole front end off and check everything out. See if I can pin point it, but it seems like a lot of poeple have the same issue.

RE: Need some help
 

I had the exact same thing happen after I had Renn Art put a DV and REVO software in. I thought it might be the DV or a Vac leak too.
I brought it back to Renn Art and they cleared codes in my onboard computer and the problem went away.

Can't explain it but it worked!?!