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Re: Need help on intermittent engine starting prob (archive)
[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Posted by Bill R. on December 31, 2000 at 13:15:48:

In Reply to: Need help on intermittent engine starting problem posted by Dave R. 91 35i, 71 02 on December 31, 2000 at 11:33:12:

Dave, I emailed you a service bulletin. I could not print the images with it. The images consisted of the special fuel rail tool. Which was just and injector holder like a long block that they laid over a bucket of water so the injectors all sat in the water. Then they had a air hook up with and adjustable pressure regulator.
This problem has been intermittent in hot or cold weather but lately it has gotten worse when sitting overnite in cold weather. I have 535iA with electronic throttle-EML no cold start valve or idle control valve.

A. Symptoms in warm weather or when engine is warm.

With engine shut off for short periods - 15 to 30 minutes engine will not start on first try, Always started on 2nd try with accelerator in idle position.

B. Symptoms in cold weather with engine cold

Car sitting overnite won't start unless accelerator is depressed a little. When engine starts runs very rough but when you lift off pedal runs smoothly at normal idle. Runs fine from then on. It feels like the car is either not getting enough gas at part throttle or is flooded. But there is no gas smell. A few weeks ago I checked the fuel pressure which was within specs and pressure was maintained for at least one hour after engine shut-off.
Also with engine cold and off, key in run, the throttle motor moves (I guess to a cold start idle position) the motor makes a humming noise and vibrates. Don't know if this is normal. Car started fine though.

Any ideas?




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