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Cold stall problem 700 1987

posted by  someone claiming to be Bruce Johnson on  Sun May 27 19:06 CST 2001 [RELATED]

First I want to thank all of the contributors to The Brickboard. I purchased two high mileage 700s last year, '87 740GLE sedan & '88 740GLE wagon, both automatics, B230F. I have been able to solve innumerable problems with both vehicles with the help of the 700 FAQ and Archives. There is one I have not been to solve. The '87 sedan starts fine but often stalls as soon as it is put in gear. I have swapped between the cars, the IAC valve, the AMM and the knock sensor. The ECT thermistor reads 2.8k ohms at 70 deg.F(a little high). Throttle body is clean, plate and TPS properly adjusted. Valve timing is correct(now). The ignition timing is 12deg BTDC. My question is about the throttle position switch. In two different postings as well as the FAQ I have read that the timing should advance 10-12 deg. as soon as the switch opens, off idle. Neither of the cars change timing when the switch is open. Could something else be overriding this signal? I have traced the signal back to the Ignition Control Unit and it is getting that far. The '87 still stalls and the '88 is fine. Any insight would be greatly appreciated.





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