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Can someone help me diagnose what's wrong with my car?

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Old 09-18-2003, 07:06 PM
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Default Can someone help me diagnose what's wrong with my car?

Car is in constant limp mode. I put EVERYTHING back to stock except the screen in the MAF which I believe is throwing the first code.


16487 - Mass Air Flow Sensor (G70): Signal too High
P0103 - 35-10 - - - Intermittent
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 35-00 - -

The dealer didn't find the issue initially, and I was hoping that someone else had the problem also.

The car goes into limp mode 6psi max. BUT... it's somewhat intermittant. You can run it fine for a few miles maybe sometimes, and then it kicks and goes into limp mode.
Old 09-18-2003, 07:27 PM
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Looks like a bad MAF and a boost leak to me.
Old 09-19-2003, 05:06 AM
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Default Bad MAF? Really. I thought the first code was just the screen...

It did run better though with it unplugged. Thanks. Any ideas of where to look for the boost leak?
Old 09-19-2003, 05:34 AM
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Default If you are using an OEM bypass valve, replace it.

If its an aftermarket one, open it up and regrease it. That may eliminate the second two codes.

If not, check all of the hoses for leaks.

The MAF Signal Too High code is an intermittent one so its probably not that serious (and it isn't what is setting limp mode).

-Dave Pramanik
Old 09-19-2003, 06:34 AM
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Default Boost leak, and the MAF screens.. I highly doubt its a bad MAF

Especially considering you weren't getting the MAF code with the chip in..
Old 09-19-2003, 07:28 AM
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Default Thanks... I actually have the stock DV back in to try and fix it...

I have a hyperboost nonadjustable and an adjustable... both which don't help. Sounds like a leak somewhere.
Old 09-19-2003, 08:44 AM
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Put the screen back and see if that fixes it but if the car runs better with it unplugged .....
Old 09-19-2003, 11:08 AM
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Make a pressure tester and hook up a compressor
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