Boost Issue

sparky_phantom · 06-03-2016, 01:39 AM

Can't tell if my car is getting heat soaked or what. I don't even give it much gas and will sometimes have a good delay even after I have been. In gear for a while. My actual load and requested load don't seem to be close to each other. My current setup: ER charge pipe, 7 inch vrsf intercooler, catless downpipe, Cobb tuner running stage 2 + sport and have tried aggressive. Can't see a difference. Spark plugs were replaced not long ago and gapped to .22

I did a log a bit ago and boost is very low no matter what map I am in. I aslo get Cobb code of P36C9. When I WOT it sounds like all my boost is leaving not being used. I still have boost however if I drive around normally or just do a quick throttle play.

I can't figure out the issue. Has anyone had this?

JETmn · 06-03-2016, 09:53 AM

I would start with a visual check of the IC piping, maybe your CP popped off? After that go for a boost leak test.

sparky_phantom · 06-03-2016, 11:01 AM

Quote:

Originally Posted by JETmn

I would start with a visual check of the IC piping, maybe your CP popped off? After that go for a boost leak test.

I did check CP and that is still on there fine. May have to do a boost leak test. Seems to only have an issue on WOT. If a wastegate is being stuck open I wonder if that would cause this.

JETmn · 06-06-2016, 11:55 AM

Quote:

Originally Posted by sparky_phantom

I did check CP and that is still on there fine. May have to do a boost leak test. Seems to only have an issue on WOT. If a wastegate is being stuck open I wonder if that would cause this.

Wastegate stuck open would take forever to spool, that doesn't sound like your issue. Boost leak would mean the turbo has to work harder and make your top end lackluster. That sounds like your issue.

sparky_phantom · 06-06-2016, 08:53 PM

Quote:

Originally Posted by JETmn

Wastegate stuck open would take forever to spool, that doesn't sound like your issue. Boost leak would mean the turbo has to work harder and make your top end lackluster. That sounds like your issue.

That was corrected. Two pipes weren't seated correctly. Everything is good now. Thank you everyone for your help.

06-03-2016, 01:39 AM	#1
sparky_phantom Private First Class 25 Rep 121 Posts Drives: 2011 BMW 335i Join Date: Oct 2014 Location: United States iTrader: (0) Garage List 2011 BMW 135i [0.00]	Boost Issue Can't tell if my car is getting heat soaked or what. I don't even give it much gas and will sometimes have a good delay even after I have been. In gear for a while. My actual load and requested load don't seem to be close to each other. My current setup: ER charge pipe, 7 inch vrsf intercooler, catless downpipe, Cobb tuner running stage 2 + sport and have tried aggressive. Can't see a difference. Spark plugs were replaced not long ago and gapped to .22 I did a log a bit ago and boost is very low no matter what map I am in. I aslo get Cobb code of P36C9. When I WOT it sounds like all my boost is leaving not being used. I still have boost however if I drive around normally or just do a quick throttle play. I can't figure out the issue. Has anyone had this?
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06-03-2016, 09:53 AM	#2
JETmn Lieutenant Colonel 245 Rep 1,595 Posts Drives: 2011 335i xDrive Msport Join Date: Apr 2013 Location: Orlando iTrader: (0) Garage List 2011 335Xi [0.00]	I would start with a visual check of the IC piping, maybe your CP popped off? After that go for a boost leak test. __________________ 2011 335Xi 6AT - VRSF catless DP - VRSF 7" FMIC with turbo inlet pipe - VRSF chargepipe - Pure Stage 1 turbo - JB4 - E30 - xHP Stage 3 - Strongflex tension bushings - Whiteline RSFB - UUC rear swaybar
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