Revs drop to zero when I go full throttle and push Clutch in

[withcheese]

So I know I have a boost issue where I can't get past 3.5 psi. The waste gate is fine and I can't find a vacuum leak. The other day I was driving and noticed while I was passing a truck I down shifted and went into 5th but I didnt let the clutch out right away. I noticed that the revs went to zero then came back up to about 700 rpms, the car didn't stall and it doesn't matter when I shift it does the same thing, the only thing I noticed is that it only happens when I go all out and not when there is a steady climb.

Mods are:
Hard pipes
Forge motorsports bpv
ATP wastegate( I know not a mod but I did replace the wastegate)
Perrin MBC
Turbo timer which isn't working since the intercooler fan stopped working

 

[SlpMsp]

I was gonna ask if you have a blow off valve thats atmospheric are you sure your recirculated and thats its well adjusted ?

 

[Cmezz331]

It's a vac/boost leak fosho. Check to see if any lines may be damaged or connections loose

 

[Nc MSP]

It's a vac/boost leak fosho. Check to see if any lines may be damaged or connections loose

same, id say get some carb cleaner and keep looking

 

[Spiced MSP]

clamp loose on intercooler pipes

 

[withcheese]

It's an atmospheric bpv I am thinking about getting a tunin kit for it since I'm using the set up that came with it, going to use the spring for 5-10 psi. Are there any obscure vac lines that aren't that visible. I took apart every vac line I could see and didn't find anything, I also used carb cleaner and didn't notice any change in idle.

 

[StealthWyvern]

If your not running your BPV/BOV in recirc mode that will happen no matter what you do.

 

[withcheese]

What will? Boggling past 3.5 psi?

 

[StealthWyvern]

What will? Boggling past 3.5 psi?

stalling between shifts, your letting out metered air saying your MAF is in the stock location.

 

[withcheese]

What is metered air? Sorry never heard that term before, and the MAF is inthe stock location.

 

[StealthWyvern]

What is metered air? Sorry never heard that term before, and the MAF is inthe stock location.

your MAF meters the air going into your engine

 

[withcheese]

So does that mean I have a leak before the MAF?

 

[StealthWyvern]

I highly suggest finding another msp guy in your area to help you out with your car.

 

[nicholsspeed]

So does that mean I have a leak before the MAF?

no,when air enters your engine through the filter it passes thgough the MAF before entering the turbo.
then travels through your intercooler and pipes and into the intake manifold.

in stock configuration the BPV puts the air back into circulation between the turbo and MAF. there for there is no loss of air that the computer thinks the engine is getting.

when you have a VTA setup with a stock configuration, you lose that air air that the MAF registerd.


the search button will help you greatly.
figured i would help a little though.

 

[withcheese]

Ok I see what you are saying so would it be better to go back to the stock bpv setup or is the btw ok to use. Also I hate search buttons on forums never really get an answer tried google though but every car is different, I greatly appreciate your help.

 

[89JDM]

Run the stock Bpv and your VTA together... That's how I'm running right now... HKS Ssqv works fine

 

[withcheese]

Didn't know I could that any threads out there about that set up?

 

[withcheese]

Nevermind google is an amazing thing...is there a benefit to running this setup over the MAF relocate?

 

[hornsfan10609]

I have a relocated MAF with just an HKS BOV, without the stock BPV and the car runs great, never had a single stalling issue.

 

[withcheese]

Might save some money and get a FMIC and relocate the MAF, seems like a good way to go.