Idle Issues w/ 94' 740 IL

[minrodthomas]

Greetings,

There are times when I put the car in Drivethat it idles way down and it cuts off. The idle also goes up and down while sitting still. Any experience with this?

[Tuffdrvr88]

Take brake cleaner and shoot it around the intake manifold, you may have a vacuum leak.

[minrodthomas]

Thanks for the info. I let a mechanic look at it. He checked all the vacuum lines. He determined it was the idle control motor going bad. Hopeflly, that's all it is.

[Tuffdrvr88]

most likely thats all but it wont be cheap lol

[jsbmw]

Originally Posted by minrodthomas

Greetings,

There are times when I put the car in Drivethat it idles way down and it cuts off. The idle also goes up and down while sitting still. Any experience with this?

Hi
Another thing to check is the crankcase ventilation valve, if the diaphragm is damaged or worn, the valve will not regulate th eengine pressure correctly causing a rough or erratic idle, and sometimes some smoling during driving. This can be reaplaced cheaply and easily by a relative amateur, as opposed to paying BMW to take the engine out, or remove the inlet manifold in order to do the swap!
We are small BMW E32 / E34 specialist breaker, supplying information and parts worldwide. We carry a dozen vehicles or so at a time, split between 5 and 7 series. If you would like any further help or information please feel free to visit our website at www.jsbmwspares.co.uk to obtain our contact details.
Regards
jsbmw