Intake install now car stalls??? Help me please!!

[IslandTSI]

OK so I recently picked up a used dejon tool intake and a kn filter. The intake only had a nipple for the charcoal canister so I attached it and let the other two vacuum lines vent to atmosphere. The rest of the install seemed to go OK except that my stock BOV return pipe wouldn't fit. I rigged one up with rad hose.

Now my new prob. If I'm driving say in third at 4000 rpm and i put the clutch in and let off the gas the rpms drop like they usually do except they drop right to 0 and the car stalls.

I thought maybe it was a problem with my jury rigged return tube leaking but i couldn't find a leak and the car idles fine in neutrel.

Any ideas here?? This is driving me nuts.

Cars a 95 TSI awd with no other real mods except free ones and a boost gauge.

 

[96whitetalon]

Did you remenber to replug in the MAS connector?

 

[DSMfânâtic]

If your stock boost gauge isn't moving, your MAS is unplugged. Other than that, hope you know someone with a logger.

Good luck.

 

[IslandTSI]

My mas is plugged in. The car seems to run fine except for this stalling problem. It only stalls if it drops from say above 3500 rpm's. If im just tooling along in 2nd at 2500 and let off the gas eaily and let the clutch out the rpms will drop a little low but the car wont stall.

 

[Turblown]

Now my new prob. If I'm driving say in third at 4000 rpm and i put the clutch in and let off the gas the rpms drop like they usually do except they drop right to 0 and the car stalls.

This sounds like what happened to my car when I tried venting the BOV to atmosphere. I could drive it ok, but I had to keep the rpms up while shifting and at idle.
I would double check that your BOV is completely recirculated into the intake and that you have no other intake leaks... so that you are not loosing metered air. Hope that helps.

-Turblown

 

[SleeperG]

you siad you left two nipples to vent to the atmosphere?!
there is your problem, you need to connect your breather line to the nipple next to your charcoal line, and the other nipple goes to your boost control solenoid.
thats why you stall, there is a post MAS vacuum leak. Also, when you boost then let off, there is a leak from the BCS bleeding air into the atmosphere instead of back into your intake. this will probably explain why you can't boost as hard after you installed the intake.

if by some strange chance, you have the vacuum/boost lines going somewhere else(functional), then you just need to cap off those unused nipples.(even though your bcs should bleed into the intake.

 

[IslandTSI]

Sorry i must have confused you. The intake i purchased only has one nipple on it for the charcoal canister. There is no nipples for the bcs vacume line or the valve cover vent. Thats why i have these lines venting. There are no unconnected nipples on the intake.

I am starting to think that either i do have a leak from the bov return or somewheres else after the mass.

 

[rob_rousseau]

Hook up the "venting" vacuum lines. Use "T's" if you have to

 

[oldman]

you have no other intake leaks... so that you are not loosing metered air. Hope that helps.

It would have if he had listened.

 

[doug]

And just for the record, there's really no need to reconnect the breather hose. You can either run it to a catch can or just let it hang.

 

[IslandTSI]

And just for the record, there's really no need to reconnect the breather hose. You can either run it to a catch can or just let it hang.

Ya thats what I thought. I didint think it was either of the hoses i left venting. Im installing a uicp and new bov this week so hopefully i can solve the problem at the same time. Im just going to pull the intake and filter and reinstall them and double check for leaks.

 

[UPGRADED2G]

definately sound like a vacuum leak. Happened to me before. After i found the leaky line, i capped it off and sealed the deal with a zip tie.