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Throwing "Mass Air Flow Circuit High Input" SES code once i hit 4k rpms @4.5psi ?????

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Old Aug 4, 2005 | 07:46 PM
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Default Throwing "Mass Air Flow Circuit High Input" SES code once i hit 4k rpms @4.5psi ?????

I got the boost under control thanks to 4.8T. Its a steady 4-4.5psi at WOT. That is till i get to 4000rpms. Then it drops off still and throws that code. Why? what does it mean?

It still spikes at the shift to 6psi, but thats much better than the 12psi it was.
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Old Aug 4, 2005 | 07:51 PM
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i'm glad you got that fixed. well at least we now know why it was falling off at rpm couse before you didn't have a code did you? did you reset it and try again i'm sure you did just had to ask. so how soon does the boost come in.
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Old Aug 4, 2005 | 07:52 PM
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did you get that pump in or no. maybe its reading to much air and setting a code i dunno just throwing it out there.
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Old Aug 4, 2005 | 08:01 PM
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No the pump will go in tommorow. I got the relay and wire for it and all though.

It threw the code earlier today. I reset it and tried it again to see what i was doing to set it off. Since my laptop is still broke I used CarChip to log a few things. IAT would peak at about 145* at 7psi before, now at 4.5psi its closer to 105*-110*.

Its still missing and idling rough, and running out of fuel alot easier than it should. I think there is something wrong in the fuel system.
1.-injector spider bad
2.-fuel pressure regulator bad and running really low pressure
3.-in tank pump is weak and going bad

Thats all i know of left to cause this.
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Old Aug 4, 2005 | 08:04 PM
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Oh yea, short term fuel trim was -5.50% and long term was -6.25%.
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Old Aug 4, 2005 | 08:09 PM
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can you log what the maf is reading with that carchip i cann't remimber if you could or not. hey by the way did you check and make sure you have no exhaust leaks before the turbo? i'm not sure about the pitting and sputering though you got me on that one. you know if i remimber right there was something out there about those things tending to leak exesive fuel can't remimber for sure but it was something about when they got old they would leak. i'm about to go smoke i'll give you a ring you at home?
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Old Aug 4, 2005 | 08:10 PM
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thats good isn't it on the fuel trim you want them to be between +-5 right.?.
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Old Aug 4, 2005 | 08:40 PM
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i think +/-.5% is good, i think -5 and -6 is too high.
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Old Aug 4, 2005 | 08:42 PM
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Hey Mike, the phone was down stairs. I got it now.
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Old Aug 4, 2005 | 09:00 PM
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Damn your slow.


So does anyone know what this code means?
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