Re: Rough Idle...Screw It! (archive)

But READ ON...With a small flat-blade screwdriver- locate the headless screw, mounted horizontally, at the base of your throttle-body. It is a throttle flap screw-stop setting, that needs to be reset, while the Motronic re-adapts to having its mapped-memory cleared. The factory
paint marks this screw, to discourage tampering.
By all means, DO NOT ADJUST THE TPS!!! You will be one hurtin'unit,if you *FIX* that till' its BROKE!
Make sure the car starts, and "tries" to stay running. SLOWLY adjust the screw, in 1/4-turn
increments- listen and watch the motor smooth-out.
Thats it.... Shut The Hood!
Zach
First thing to look for is vacuum leaks. A small leak can cause your car to idle soo low it will baredly run. As for the timing, your distributor cap is mounted directly to your head so you can't rotatate it to adjust the time. One more thing, when you disconnect the battery, or certain fuses for a period of time, your car will relearn mixtures and ect..which will cause the car to idle rough or even stall for an hour or so.
Russ Wilson
87 325is
new timing belt and a 288 cam
I just installed intake on my car, but the rough idle was there before...the originial owner said he had the timing belt changed, but he didnt have the car re-timed...any solutions?
thanks
Jon
'87 325iS

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