My 1989 Pontiac 6000 has a new oxygen sensor and plugs, with 3 coils. It runs good until it warms up, then it runs rough. What could be wrong?
by 
MSHAZEL40
ANSWERS: 4
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It could be the exhaust gas recirculation valve (egr) is leaking.
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There are 2 other sensors that control fuel delivery that could be causing your problem. The intake air temp. sensor, and the coolant temp sensor. Either of these will usually throw an error code. Have you had the car's on board computer scanned?
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NO its the catalyst coverter, i sware on it, I put hundreds of dolars into mine all new sensors, fuel intake everything, fuel pump, new battery, plugs, spark plus almost 600 and yet verytime it would run and get to a certain temp and for like anywhere between 5-20 minutes it would stall completely dead, at red lights and all.. seriuolsy i think its the converter-catlyast or however u spell it.. what about the throttle positioning sensor, or map sensor.. dont invest too much money into your 6000 i put over a grand and now its in a junkyard... good luck for real.
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NO its the catalyst coverter, i sware on it, I put hundreds of dolars into mine all new sensors, fuel intake everything, fuel pump, new battery, plugs, spark plus almost 600 and yet verytime it would run and get to a certain temp and for like anywhere between 5-20 minutes it would stall completely dead, at red lights and all.. seriuolsy i think its the converter-catlyast or however u spell it.. what about the throttle positioning sensor, or map sensor.. dont invest too much money into your 6000 i put over a grand and now its in a junkyard... good luck for real.
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