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Car Forum / Oldsmobile Cars / July 2004Update to 1991 olds 88 battery runs down over night
My 1991 olds 88 battery runs down over night. 2 shops looked at it and couldn't find the cause. Some updates: I tested the batt. with a load tester and it is OK. The alt. puts out 14.8. Disconnecting the batt and putting an amp meter in series shows no current draw. However, starting the engine and then shutting it off causes a the thing (maybe idle air solenoid ?) to click that is just aft of the throttle body and above the crossover pipe on the left side of the engine. It has a 4 wire connecter that plugs into it. It doesn't click after the batt. cable is disconnected then reconnected. I started the engine, shut it off and the thing clicks again. I tried reading codes but the check engine light doesn't come on. This may be part of the problem or just a dead bulb. I bought a shop manual but it won't come for a week or so. The car starts and runs fine, but I only drove it about 10 miles before I bought it. Thanks for reading this and thinking about it. Have you tried unplugging the part you're talking about to see if the battery would stay up overnight? Yes and it does. What ever allows the thing to run after the engine stops and the ign is off is atleast part of the problem. > Have you tried unplugging the part you're talking about to see if the > battery would stay up overnight? Have you pulled the part and had it tested yet? No. Hadn't thought of that I guess because the engine seems to run OK. Starts good, no stumbling on acc., runs smooth at road speed, shut off cleanly. I have a shop manual coming and I was going to wait until I had the wiring diagram to see what feeds whatever the thing is called. (maybe idle air solenoid ?) It may have its power straight from the ECM which will mean a trip to the junk yard for a used one. I priced one: $35. I was hoping someone had the same or similar problem and could steer me in the right direction before I start guessing parts. The fact that the thing clicks with a regular rhythem pattern is strange too. It's like an R/C charging and discharging. > Have you pulled the part and had it tested yet?  SignatureUsing M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ How about pulling the part and filing it (in the garbage), get a new part and see what happens. It's not too expensive, is it??? -PapaRick ----------------------------------------------------------------------- > Yes and it does. What ever allows the thing to run after the engine > stops and the ign is off is atleast part of the problem. [quoted text clipped - 3 lines] > > I got the GM shop manual for the car and found the idle air controler that was running with the switch off is controled by the ECM. I went to the junk yard and got a ECM for $30, installed it and wverything is find so far. The factory shop manual is large and has a lot of information. It is the place to start for trouble shooting problems. > How about pulling the part and filing it (in the garbage), get a new > part and see what happens. It's not too expensive, is it??? -PapaRick [quoted text clipped - 6 lines] >>> Have you tried unplugging the part you're talking about to see if the >>> battery would stay up overnight? SignatureUsing M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
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