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Re: 635 Running rough at low speeds (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by dwm on July 03, 2000 at 11:32:06:

In Reply to: 635 Running rough at low speeds posted by Tom M. on July 02, 2000 at 11:42:49:

: I am trying to troubleshoot a running problem with my wifes '85 635csi. It cold starts OK and seems to idle fine, but when I start to accelerate you can feel the hesitation start to set in as you run up the rpm. When I start to slow down you can feel the engine 'lope' at lower rpm's, 2000 or less.
: It has new plugs and wires, new dist. cap and rotor, new throttle position switch and I just put in a new idle control valve. Valve adjustment is OK.
: If it helps, I do have to crank it on hot starts. I am not sure whether this is related or not.

: As usual, I thank all forum members for reply's.

: Regards,

: Tom M. in PA
: '85 635csi
: '87 635csi

Could be... injectors are not operating; solution run a can of injector cleaner. Another possiblity is the O2 sensor. the O2 sensor is about $125 if you can get the old one out. Last but not least wrong plugs or improper plug gap. Thats all I can think of. Good luck

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