A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

HELP!!! Low boost problem....

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Old Mar 21, 2001 | 04:41 PM
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Default HELP!!! Low boost problem....

After trying Ron C's car I realized that I was getting alot less boost that I should, 12psi tops!! I used to get from 15-18 consistantly. The only recent thing I did was the "air box mod" could this be the issue? It's not the BPV I already replaced it. I also unplugged the ECU to reset everything.
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Old Mar 21, 2001 | 04:45 PM
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check your hoses and connections for cracks and leaks
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Old Mar 21, 2001 | 04:50 PM
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Reset again. Check for a loose hose.
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Old Mar 21, 2001 | 05:47 PM
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Default a ctny guy and I were out on a test drive when his intercooler to header hose popped off

check those clamps
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Old Mar 21, 2001 | 06:23 PM
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Default Check all the hoses. Did you reset the ECU?

Oh, wait. I was there for that. Sorry, I couldn't help it. :-D


I hope you find the problem.
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Old Mar 21, 2001 | 06:25 PM
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I just checked all hoses and undid the air box mod....no boost still
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Old Mar 21, 2001 | 07:09 PM
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APR cold weather instructions?
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Old Mar 22, 2001 | 04:45 AM
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If that was the case, our cars would have performed the same. Plus, it's wasn't really cold.
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Old Mar 22, 2001 | 06:24 AM
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just a thought, after the AIR box mod
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Old Mar 22, 2001 | 07:19 AM
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I undid the mod, some say it might be the turbo to front crossover tube hose which I'll check t'nite
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