Thread: 3.3 91 Ciera S
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Old 10-24-2006, 10:07 AM
Ian Szgatti's Avatar
Ian Szgatti Ian Szgatti is offline
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3.3 91 Ciera S

276,500 kilometers

I am wondering if anybody knows what tempreture the thermostat has to reach before the ECM goes into closed loop mode, recognizing the vehicle to be at operating tempreture.

The reason is... I have a very good fuel pump, fuel filter, spark plugs, new wires, 02 sensor is only 30,000 kms old, clean injectors, good EGR, and generally good throttle responce. If I try to accelerate to fast from a stand still, the car will buck and nothing will happen. Fuel will shoot through the exhaust and burst in the cat. (think about blocked converters during this too??).
The resistance of the primary and secondary terminals is another thing I'd like to know, so I can test them.
To make this interesting, concider that if I accelerate slowly at first and work into the pedal before the cars shifts out of first, the engine will reach a high RMP without missing, and have a lot of power.

I have not done a compression test, so I won't rule out the engine not producing enough cyclinder pressure to sqwak... but I doubt that... it seems under normal driving conditions to operate fantastic. No high oil consumption or coolant loss. I maintain this cars very well.
Could a TPS act sluggish? I know the values are from .45 V to 4.75 V at WOT... It doesn't seem to miss a beat.
Sorry about the very long post, hopefully there are some cars nuts on here who don't mind a challenge... or better yet, somebody who has experianced and solved a similar symptom.