Rough idle from small fuel leak?

[Ken35i]

Quick easy question. If I were to, say, have a pin-hole size fuel leak at part 11 (http://www.realoem.com/bmw/showparts.do?model=HD22&mospid=47382&btnr=13_0232&hg=13&fg=15), would that cause a rough idle? ;)

[pingu]

Have you got a catalytic converter and 02 sensor? If you do then I doubt the leak would have any effect as it would be compensated by the DME.

A fuel leak, no matter how small, sounds like a fire risk though!

[Ross]

If the fuel pressure is low enough the idle would be effected. The leak would need to significant.
No question that hose needs to be changed.

[Ken35i]

If the fuel pressure is low enough the idle would be effected. The leak would need to significant.
No question that hose needs to be changed.

Of course.


Have you got a catalytic converter and 02 sensor? If you do then I doubt the leak would have any effect as it would be compensated by the DME.

It has a cat and no O2 sensor.

[Jon K]

If the fuel pressure dropped then yes! If not, then no.

[ahlem]

I second the fire concern. Try pulling your dipstick and checking to be sure the O rings are tight. Loose O rings mean rough idle. Check for vacuum leaks in your rubber parts.