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Posted by Alex (90se5spd) on June 24, 2002 at 18:07:52:
diagnositics done so far now i have no clue
first of all, the symptoms
motor starts up, sometimes a/c will enguage immediately sometimes not. after enguage occures it runs for a random ammount of time (with the a/c and fan switch on of course) until the idle goes high from 1k>2k rpms 5secs or so later it disenguages the clutch as well as the radiator fans for the a/c. idle does back down, attempts to reenguage, fails and disenguages, trys again and repeats the cycle. sometimes however it works just fine without the cycling. difficult to predict.
no bubbles in the view window
relays are working properly
a/c clutch operaters correctly
both amb air temp sensor and dual pressure sensors appear to be working correctly and get a reading
TPS...apon is connection and testing resistance it was found that that switch is open all the time, reguardless of throttle position. however after starting the motor with the TPS disconnected, problem persisted.