99 E36 Low RPM stumble when warm? suggestions?

Okay folks. I did a search, and didn't see anything that jumped out at me so I thought I'd try the collective knowledge to see if this is a common issue.

I've only owned the car for a couple weeks. Overall it seems to run pretty good, but I noticed that it has a bit of a stumble when leaving a light or sometimes when changing gears.

it *seems* to only happen after it's warmed up although I wouldn't guarantee that. NO CEL's, no pending codes (I did a scan).

My standard MO when I get a new to me car is to go through and change the juices, and spark plugs just so I have a baseline. I have NOT done that yet, and perhaps new plugs will do the trick?

Anyway, I know I'm a noob here so please go easy on me Thanks!

Yep, try to swap out the plugs, oil change, oil filter, new fluids and then check the vital signs on your ride again. Update your progress after you have done this. Afterwards try and save up some cash for a cooling system overhaul in order to feel confident everywhere you drive it. Also if you have not posted up pictures of your car do so now! lol. Ohhh and welcome to the fest!

ifirst, welcome to the fest!!

would also suggest cleaning the throttle body and the idle control valve.

and +1 with the pics.



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I agree with everything mentioned above. The first thing I would look at would be the air intake boot (check for cracks, which may be small and down inside the flexible "accordion" section). I'm thinking it's a vacuum leak issue.