Rough Idle

[frickendom]

Hello. I just purchased this e30. I am having a rough idle when I start my car. After it starts, it shakes violently two times then idles a little rough. Sometimes its good after, but other times it shakes violently till I gas it. After gassing it sometimes it would be better but sometimes its not. It drives fine with lots of power. Doesn't hesitate or stall when driving. I already replaced the spark plugs, fuel filter, cat converter, Oil change, and oil filter. When I bought the car, It had a dead battery and I got it recharged at autozone. After that it drove fine, but just yesterday, the car didnt start till i jump started it. Then it was good again.. What can be the problem?

[pfahls1]

Have you checked for vacuum leaks? Also check your oil filler cap to make sure it seats well and check the o-rings on your dip-stick. I'm sure there a lot of causes for this and other people will chim in too.

[Rascal2pt0]

look for cracks in anything plastic going to or from the intake manifold. Do a general tuneup, plugs, wires, rotor, and cap. At a minimum take an eraser(don't laugh it works) to the rotor and cap terminals to clean of any oxidation.

[Ceeker]

look for cracks in anything plastic going to or from the intake manifold. Do a general tuneup, plugs, wires, rotor, and cap. At a minimum take an eraser(don't laugh it works) to the rotor and cap terminals to clean of any oxidation.

Hey cool tip..are we talking a "pen" eraser or "pencil" there is a difference in the compound. I was just using course sand paper until I read this..lol.

I would also check your cold start injector for pre -87 models.

[frickendom]

Thanks guys. I will be checking tomorrow when theres light