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Old 06-27-2010, 02:23 PM   #7
kenmolloy
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Re: 92 Buick GS stalls with low fuel light comes on

Removed the ECM and it looks fine, it is encased in Plastic, no signs of any water damage, removed wiring and pins look new.

removed the wiring harness for the cam and crank sensors to the ICM, the wiring repairs i saw early were factory maded for where the wires from can and crank join, check for continuity of all the wires and could not find any opens in the wire (.01 Ohms resistance in all wires) re-loomed the harness, put it all back together and the SES light came back on as soon as i put it in gear

Was working at a friends bout 20 mi away so decieded to head home, this time it kept stalling really bad, and would not restart for several minutes between, i noticed that the fuel pump was not turning on after it stalled, but as soon as it came on the car would start and drive about 2-3 min, stopped by another friend on way home (he has a scanner) scanned and..... code 41 Again, told him i was sure it was fuel now and not electrical, cause now when it dies it dies like it running out of fuel, not like before it would just die no sputter just like i turned the key off. so i borrowed his fuel gauge and.... when i turned on it would pressurize to 40 psi but very slowly (maybe this has something to do with the low fuel light being on), started car and pressure would drop to 20, then rise to 40 and then back again, when it died the pressure dropped alll the way to "0"....

Sooo... I removed the fuel relay and jummpered it... bang right up to 40 psi and held it there.... drove to gas station and put $20 in (wanted to keep tank above 1/2 with the relay jumpered (btw low feul light is staying on), went for a nice long drive both city and highway and no more stalling,but now car idles low (500-600 rpm) before when car was running good it would idle at 900-1000 rpm. and it sounds rough at idle and sometimes stumbles a bit at take off.

not sure where to go from here I am thinking ICM? priced one out and.... $450 , hoping they though i was asking for a ECM.., someone suggested it may be the TPS.... anyone have any ideas/tests i can do to isolate further....

On the brighter side now i can at least drive more than 5k at a time...lol
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