No boost. Diagnostics help please!

ASPEC135i · 11-02-2012, 09:29 AM

Fixed!

Thanks fellas.

eric@helix · 11-02-2012, 09:53 AM

Did you check the hot side connection to the intercooler?

Simple5 · 11-02-2012, 04:09 PM

Boosting fine before BOV installation. Check all your connections. Your TMAP sensor should be fine. If it was unplugged your cluster would have lit up like a christmas tree.

ETS Michael · 11-02-2012, 04:36 PM

Helix may be on to something. If you had a bunch of trouble on the cold side and they are now fixed, I would check the hot side as well, but if you didn't install an intercooler, that wouldn't be the case. You removed the connection on the brake booster? Now they work fine? If not, i would check where that connection goes into the intake manifold.

If you can't figure it out. Sometimes it's easier to uninstall it and reinstall it and pay extra close attention to every part of the install.

michael

ASPEC135i · 11-02-2012, 09:42 PM

Thanks for the reply guys! Not having boost really sucks. I am driving around and the car's performance is of that of a 1994 corolla.

Please keep the advices/educated speculations coming!

Quote:

Originally Posted by eric@helix

Did you check the hot side connection to the intercooler?

Not yet. Never touched this side and didn't think any movements were involved on that side. May have my mechanic take a look at it when the car is on the lift on Monday/Tuesday.

Quote:

Originally Posted by Simple3

Boosting fine before BOV installation. Check all your connections. Your TMAP sensor should be fine. If it was unplugged your cluster would have lit up like a christmas tree.

Yup! I had a healthy amount of boost before BOV installation. All this happening is pretty disappointing, as I was so excited to hear my n54 opened up!

Quote:

Originally Posted by ETS Michael

Helix may be on to something. If you had a bunch of trouble on the cold side and they are now fixed, I would check the hot side as well, but if you didn't install an intercooler, that wouldn't be the case. You removed the connection on the brake booster? Now they work fine? If not, i would check where that connection goes into the intake manifold.

If you can't figure it out. Sometimes it's easier to uninstall it and reinstall it and pay extra close attention to every part of the install.

michael

Ya my IC is stock. Never touched it.

My brake booster works fine

11-02-2012, 09:29 AM	#1
ASPEC135i Lieutenant 16 Rep 566 Posts Drives: sideways always Join Date: Oct 2012 Location: location, location iTrader: (0)	No boost. Diagnostics help please! Fixed! Thanks fellas. Last edited by ASPEC135i; 11-07-2012 at 10:39 AM..
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11-02-2012, 09:53 AM	#2
eric@helix 208 Rep 1,161 Posts Drives: 01 M Coupe, 08 135i, '12 328i Join Date: Jul 2007 Location: Philadelphia iTrader: (0)	Did you check the hot side connection to the intercooler?
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11-02-2012, 04:09 PM	#3
Simple5 Major 348 Rep 1,407 Posts Drives: F90 M5 and E84 X1 Xdrive35i Join Date: Jul 2011 Location: USA iTrader: (8)	Boosting fine before BOV installation. Check all your connections. Your TMAP sensor should be fine. If it was unplugged your cluster would have lit up like a christmas tree.
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11-02-2012, 04:36 PM	#4
ETS Michael Major 76 Rep 1,155 Posts Drives: 335i Join Date: May 2009 Location: Vancouver, WA iTrader: (4)	Helix may be on to something. If you had a bunch of trouble on the cold side and they are now fixed, I would check the hot side as well, but if you didn't install an intercooler, that wouldn't be the case. You removed the connection on the brake booster? Now they work fine? If not, i would check where that connection goes into the intake manifold. If you can't figure it out. Sometimes it's easier to uninstall it and reinstall it and pay extra close attention to every part of the install. michael
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