Geo Prizm Problem Report

Geo Prizm Driveability Concerns Due to Throttle Position Sensor Out of Adjustment

(7 reports)

The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due to carbon build up. This will cause the idle timing to advance more than 30 degrees which will cause very high HC and NOx emissions. Conversely, the Throttle Position Sensors can wear out and not properly advance the timing which causes a lack of power and poor fuel economy.

for some unknown reason i have total loss of power even with a full tune up after 40 miles per hour cant maintain speeds on highway slows down going up a slight incline no one can find the issue this could be it -
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1995 Geo Prizm, 193000 miles and it cuts out at 2700 rpm and above. Can accelerate through it...