Boost solenoid help

spectacula · 10-10-2012, 09:53 PM

I test my boost solenoid and found out it was bad so changed my boost solenoid today. Before i changed it i would only boost 5-6 psi. I connected everything correct but now im getting no boost @ all. Limp mode, underboost code. Any ideas whats wrong? Thanks in advance

scflaw · 10-10-2012, 10:13 PM

check the electric connectors. You may not have plugged them in properlly

marv85 · 10-10-2012, 11:10 PM

+1, check all vacuum hoses as well. Make sure you got everything right. check Real OEM if you are confused. (under engine, then vacuum control)

scflaw · 10-10-2012, 11:18 PM

i had some problems with new coil packs i replaced, i was getting misfires and i finally found out that the new coil packs are made of some kind of different material or design and the connectors had to be forced in to be sitted properly. They feel like they're in but theres still a tiny bit of room for it to be properly plugged. So something similar may be happening to the boost solenoids.

chirp-1 · 10-11-2012, 09:05 AM

Did you check for a boost leak?

spectacula · 10-11-2012, 02:11 PM

Quote:

Originally Posted by scflaw

check the electric connectors. You may not have plugged them in properlly

Quote:

Originally Posted by marv85

+1, check all vacuum hoses as well. Make sure you got everything right. check Real OEM if you are confused. (under engine, then vacuum control)

Quote:

Originally Posted by scflaw

i had some problems with new coil packs i replaced, i was getting misfires and i finally found out that the new coil packs are made of some kind of different material or design and the connectors had to be forced in to be sitted properly. They feel like they're in but theres still a tiny bit of room for it to be properly plugged. So something similar may be happening to the boost solenoids.

Quote:

Originally Posted by chirp-1

Did you check for a boost leak?

im going to check everything now...thanks guys

spectacula · 10-11-2012, 08:03 PM

no luck guys

TurboBimmer · 10-19-2012, 03:36 PM

Quote:

Originally Posted by spectacula

no luck guys

Did you get this solved?

TenshiWingusu · 10-19-2012, 04:12 PM

Quote:

Originally Posted by spectacula

no luck guys

Get a Mityvac or similar vacuum gauge and check to make sure you are getting 26" Hg of vac at the two canisters at idle. If you do then you can move towards the the solenoids. But they wont work at all if they aren't being supplied with proper vacuum to close the wastegates

marv85 · 10-19-2012, 04:12 PM

Quote:

Originally Posted by spectacula

no luck guys

Basic question. do you get limp at startup or doe you have to load the car to get it?

marv85 · 10-19-2012, 04:13 PM

Quote:

Originally Posted by TenshiWingusu

Get a Mityvac or similar vacuum gauge and check to make sure you are getting 26" Hg of vac at the two canisters at idle. If you do then you can move towards the the solenoids. But they wont work at all if they aren't being supplied with proper vacuum to close the wastegates

+1, now that you've checked the connections it's time to check whether you do have vacuum.

10-10-2012, 09:53 PM	#1
spectacula First Lieutenant 21 Rep 338 Posts Drives: e92 335i Join Date: Nov 2010 Location: long island iTrader: (5)	Boost solenoid help I test my boost solenoid and found out it was bad so changed my boost solenoid today. Before i changed it i would only boost 5-6 psi. I connected everything correct but now im getting no boost @ all. Limp mode, underboost code. Any ideas whats wrong? Thanks in advance __________________ "If one day speed kills me, do not cry because i was smiling." -Paul Walker
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10-10-2012, 10:13 PM	#2
scflaw Captain 209 Rep 741 Posts Drives: M135I, Macan S, G26 i4M50 Join Date: Jan 2011 Location: HKG iTrader: (1)	check the electric connectors. You may not have plugged them in properlly
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10-10-2012, 11:10 PM	#3
marv85 Colonel 71 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	+1, check all vacuum hoses as well. Make sure you got everything right. check Real OEM if you are confused. (under engine, then vacuum control) __________________ '18 F80 M3 Comp 6MT - Stock '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT \| '07 E90 335i, PTF COBB E50, FBO, HFS4
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10-10-2012, 11:18 PM	#4
scflaw Captain 209 Rep 741 Posts Drives: M135I, Macan S, G26 i4M50 Join Date: Jan 2011 Location: HKG iTrader: (1)	i had some problems with new coil packs i replaced, i was getting misfires and i finally found out that the new coil packs are made of some kind of different material or design and the connectors had to be forced in to be sitted properly. They feel like they're in but theres still a tiny bit of room for it to be properly plugged. So something similar may be happening to the boost solenoids.
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10-11-2012, 09:05 AM	#5
chirp-1 First Lieutenant 13 Rep 305 Posts Drives: 2015 435i xDrivePorsche 911 SC Join Date: Feb 2012 Location: Ohio iTrader: (1)	Did you check for a boost leak? __________________ ..
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10-11-2012, 08:03 PM	#7
spectacula First Lieutenant 21 Rep 338 Posts Drives: e92 335i Join Date: Nov 2010 Location: long island iTrader: (5)	no luck guys
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