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Misfiring on all cylinders? HELP!

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Old 06-24-2005, 09:08 AM
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Join Date: Jun 2003
Location: Rockford, IL
Posts: 1,122
Car Info: 98 RS
Misfiring on all cylinders? HELP!
I just got my CEL pulled and its came up with this.
135 O2 sensor heater circuit. Bank 1 sensor 1.

Then also it is misfiring on all 4 cylinders.

The car is a 98 2.5 RS. It does have a proECm aftermarket chip and Greddy EVo II exhuast.

Any ideas on what is causing the problem?
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Old 06-25-2005, 10:54 AM
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Join Date: Nov 2002
Location: SoCal
Posts: 361
Car Info: 98RS coupe, Ver. 8 STI pwr'd
Lightbulb
Your front O2 sensor is bad. Replace the O2 sensor, reset the ecm, and that should tak care of the problem.
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