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E36General discussion and technical help for (E36) 1992-1999 3 series cars. 318, 323, 325, 328.
I cleaned my ICV last week, and instantly I noticed a nice improvement in the car's 'breathing'. But then after a day or two, the idle seems a little rougher than before I cleaned it. While idling rough, the car rocks slightly from side to side. It'll do this every 20 or so seconds, until the car has been driven a few miles and the engine is thoroughly warmed up. It also hesitates slightly when starting from a standstill . . used to do that only with the A/C on, but now it does it more often.
I'm gonna change out the O2 sensor next week, see if that does something. I guess that would be the next step. But other than that, anyone have any other ideas, thoughts, or suggestions??
you can clean it, but it wont matter because if you say after the car warms up its fine, then its not your throttle body, however it has to be your ICV because the ICV isnt really used when the car is warm, and what i meant by that is after you put the ICV valve in, 2 days later from the bumps on the road it might have changed its position a little bit because when it is sideways it does have a dramatic effect on the idle
Originally Posted by c1apton
I keep forgetting that - I have a great memory but it doesn't last long
after you put the ICV valve in, 2 days later from the bumps on the road it might have changed its position a little bit because when it is sideways it does have a dramatic effect on the idle
On E36's the ICV is held in place by a rubber collar, and it can't move or twist because the intake manifold hose is rigid. Unless you swapped that hose for an aftermarket one, that sucker ain't movin'.
I cleaned out my TB once or twice, one time the car idled funny afterwards, but the carbon build up and cleaning product just had to be burnt away.
I've read the same thing in the case of ICV's; that it sometimes gets worse before it gets better. Maybe that's all it is. It was doing a little better yesterday, so we'll see if it keeps improving.
when last did you replace the fuel filter?
Another good suggestion . . I haven't yet since I bought the car back in March. Been concentrating on the suspension & cooling up till recently. I'll change that along with the O2 sensor while I'm under the car. Then I'll clean up the TB & install new spark plugs. Then I'll see where I am from there. The problem isn't severe at all, I just wanna try and take care of it before the winter comes.