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vinnysrt8 01-11-2010 07:50 AM

99 740iL - Rough idle in park and drive
99 bmw 740il rough idle in park and drive. the car has 109000 miles. could it be the spark plugs and how hard is it to change thanks vinny

vinnysrt8 01-11-2010 07:26 PM


rrtec 01-24-2010 11:55 AM

Any idea of the service history? Could be a plethora of things..

Vacuum Leak
Bad Gas
Fuel filter
air filter

The list goes on.. Any other symptoms? Check engine light? throwing codes at all?

crkrental 01-25-2010 04:15 AM

Changed Plugs..
I haave the same problem and I changed the plugs and coils and I have the same problem still but not as bad as before. I will take mine 760li to the dealer when I arrive back from Amsterdam. I think this is the best solution for this type of problem. I've been to several places and they tell me the same ol story about the coils and plugs. Will let you know more when I find out the problem with mine car.

TerryY 01-25-2010 10:58 AM

Check for vacuum leaks too.

vinnysrt8 01-26-2010 10:45 AM

it runs good now i reset the computer and it seems good.

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