Just finished installing PD150 intake manifold, and racepipe. My engine shut off!!!

Pcar993 · February 25th, 2010, 15:37

I test drove it, while in 2nd gear, i pushed the pedal down, but did not floor it yet. The boost shot up to 31-32psi (which has never happened before) and made some weird noise (turbo surge??) so i quickly let off the gas pedal. The whole thing lasted like 2 seconds. I let off the gas pedal as soon as i saw 31-32psi. I knew something was wrong. Then the engine shut off

I pulled over. I tried to start her back up but it wouldnt. I waited about 5 min. I then tried to restart it and it worked! It seems to be working fine. The turbo is working fine too. I dont understand what happened... Any ideas??

I test drove and rechecked everything. I did not find any problems except that with the stock clogged up intake manifold, i would boost to 29psi and it would hold 26-27 psi in all gears througout the gear. Now it barely spiked up to 25psi and it would taper off to 20psi. The new setup pulls a little better at low end as well as high end with slightly less smoke compared to my stock clogged intake manifold. Is the boost tapering off because the pd150 manifold and racepipe are alot less restrictive?? Did anyone notice that? The Boost levels are a huge difference compared to stock mianifold so Im a bit worried is i might have a boost leak?

Farfromovin · February 25th, 2010, 16:28

Sounds like the car is running a little closer to what the tune calls for if you ask my opinion. I'd be a little worried about that 25 psi though. I'd like to see some VCDS logs to check your actuator settings. You SHOULD NOT run 26-27 psi sustained in a VNT-17 in my opinion.

Generally speaking, all the air mods don't really add much power. They just let more air flow so you can add more fuel and get a bit more power. If you were smoking like a train to begin with, then I would assume the increased air would help for a more complete combustion process and the power would show up there.

Pcar993 · February 26th, 2010, 17:49

??? anyone know why my engine would shut off on its own?

Overfuelin5spd · February 26th, 2010, 18:38

maybe it detected an overboost condition and killed to protect itself

LNXGUY · February 26th, 2010, 19:09

Quote:

Originally Posted by Overfuelin5spd

maybe it detected an overboost condition and killed to protect itself

Nope, the only thing it would do is go into limp mode, it wouldn't kill the engine.

oldpoopie · February 26th, 2010, 19:59

What does vag-com say?

BlownBusa · February 26th, 2010, 20:53

I know it wasn't nice, but I was (trying to) showing off... I roll in to water, set e-brake, put it in second gear, rev to 4k, dump clutch, tires begin to spin and smoke and then dead... Car shut down. Started right back up and drove away, smokey fast.

My thought was I guess the ECM didn't like that...

oldpoopie · February 26th, 2010, 22:13

Quote:

Originally Posted by BlownBusa

I know it wasn't nice, but I was (trying to) showing off... I roll in to water, set e-brake, put it in second gear, rev to 4k, dump clutch, tires begin to spin and smoke and then dead... Car shut down. Started right back up and drove away, smokey fast.

My thought was I guess the ECM didn't like that...

Sounds like ASR kicked you out then you stalled.

jsrmonster · February 28th, 2010, 05:25

DO NOT PLUG YOUR VENT LINE TO THE AIR BOX. Check your vacuum hoses, sounds like your turbo actuator has vacuum to it all the time. Kinked hose to the turbo can get sticky and hold vac even if n75 is vented.

Did you check your actuator to see if it's working properly and adjusted correctly (5" HG cracking)?

Jeff

edit I see you have no air box, put a small filter on your n75/n18 vent hose. If it is dangling open, it can suck in crud that can screw up the n75 valve.

Pcar993 · February 28th, 2010, 19:17

Quote:

Originally Posted by jsrmonster

DO NOT PLUG YOUR VENT LINE TO THE AIR BOX. Check your vacuum hoses, sounds like your turbo actuator has vacuum to it all the time. Kinked hose to the turbo can get sticky and hold vac even if n75 is vented.

Did you check your actuator to see if it's working properly and adjusted correctly (5" HG cracking)?

Jeff

edit I see you have no air box, put a small filter on your n75/n18 vent hose. If it is dangling open, it can suck in crud that can screw up the n75 valve.

Im actually running stock airbox with the vent line to the airbox. I'll try to disconnect the line. Once i disconnect the line, ill put some sort of filter. To verify, the vent line is the same line as the n75/n18 vent hose?