WEIRD BEHAVIOR

User topics relating to software that provides a tuning UI to alter ECU code and data

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WEIRD BEHAVIOR

Postby TALONTRAX » Tue Mar 13, 2007 5:46 pm

I have a 98 Tsi awd. 5 speed. The car has a list of mods 16G, safc, supporting mods. The car has always run perfect. I only drive it for fun, it`s not a d.d. Heres what it`s doing out of the blue:
Starts, & idles rough (always had a perfect smooth idle)
Has hesitations/dead spots in the throttle (just off idle)
Anywhere past 30% throttle, & onset of boost, it will pop loudly, misfire, lose power, & a/f. guage reads 1.01v!!
sounds like something is causing super rich condition, boost leak ????

What I`ve checked so far:
Boost leaks,rigged up a pvc.pipe with a quick-release air fitting, & charged entire system(upper, lower ic.pipes,intercooler, bov. valve, but not the compressor) with 25 psi, no leaks.

Tried another maf, (stock 2G)no change
Tested the tps. with a dvom,nice smooth sweep, full range present
Tested the map.sensor, voltage is 1.65 at idle, & rises close to 5v as it gets closer to 0 vac. or boost(accelerating).

Any ideas ??? This car ran absolutely perfect until the other day, then these symptoms came up out of the blue.

Maf. reset output transistor ??? What is it`s function? Could this be my problem? Where is it located, inside the maf, or the ecu?
TALONTRAX
 
Posts: 10
Joined: Sun Feb 25, 2007 5:48 am
Location: SOUTHEASTERN PA.

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