2G car starts idle surges then stalls (log)

eclipto98 · Nov 17, 2014

im having some major issues with the idling in my car, everything ran fine yesterday morning but the same night before i left to work my car took a long time to start, after driving it 30 feet it stalls and would not start, so i hooked up link and for some reason all of my settings were changed so i changed them back drove to work then it happened again on the off ramp.

I had a bad ground so i fixed that but now after the car heats up it idle surges higher and higher until it stalls. if i give it gas it dies right after. i checked my plugs, and cts both seem to be working i dont have any major boost leaks. and the biss screw has been the same. but now my o2 is reading 0.00 now but before it was at a steady .02 volts

any help would be great

i uploaded 3 logs the first one i let it heat up. the second one was starting up after it stalled
Attached Files

HallerDSM · Nov 17, 2014

Sounds like a computer issue. I would check ecu.

eclipto98 · Nov 18, 2014

HallerDSM said:
Sounds like a computer issue. I would check ecu.

ive checked the ecu all caps are good nothings damaged

rough · Nov 18, 2014

I have a similar issue and it's the Maf, try unplugging it and see if it stays running!

eclipto98 · Nov 18, 2014

rough said:
I have a similar issue and it's the Maf, try unplugging it and see if it stays running!

it doesnt run with the maf unplugged. i just changed my alternator because i had a code for that and used my tps to control my idle with link and its running fine now

GST with PSI · Nov 18, 2014

The car is not at operating temp, and also not in closed loop. It's hard to tell anything about idle when those two things aren't happening. Warm up the car, and pull another log. Add Baro and battery voltage to the log.

eclipto98 · Nov 18, 2014

GST with PSI said:
The car is not at operating temp, and also not in closed loop. It's hard to tell anything about idle when those two things aren't happening. Warm up the car, and pull another log. Add Baro and battery voltage to the log.

how do you add battery voltage i was looking for it but i didnt seem to find it.
on the second log the car was in operating temp but since the o2 is malfunctioning it stays in open loop longer then it should. simulating my idle switch fixed the problem.

GST with PSI · Nov 20, 2014

You need to add them to your captured values. While logging, press F-10, and add baro and battery voltage to the log. Add ISCPosition as well.

After you add those values, let the car get up to operating temp, and capture another log at idle.

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2G car starts idle surges then stalls (log)

eclipto98

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HallerDSM

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GST with PSI

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