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Video: My car bogs when I give it more than 20% throttle. Any suggestions? 200 1991

posted by  AOG on  Tue May 15 17:50 CST 2012
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last visit: Sun Feb 2 13:09 CST 2014
[RELATED]

Could this be as silly a thing as a bad electrical ground that is "disconnecting" when the engine rocks a certain amount - as in too much torque/load to where the connection breaks? Possibly a strain on the AMM harness? It does sound like ignition is disappearing, but this may be deceptive. I'd suggest making up a new grounding lead or using a jumper cable to fake one to temporarily make a complete grounding path during testing.

Also, my Bentley manual isn't too good about explaining the TPS function any farther than the off-idle switch. In most every other car, the TPS is a potentiometer that varies resistance to tell the ECU where the throttle plate is vs RPM vs airflow/manifold press. In those cars a WOT switch is also incorporated. Is our TPS simply an off-idle switch??? Being throttle position sensitive makes me want to blame the TPS.

Good luck, you'll get it figured out! Nice clean engine BTW!
Steve






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