2005 x5 reading misfire

I have a 2005 x5 I have taken it to the BMW dealer and they still can't not fix. Check engine lights flas and at times it will not go over 5 mph, but if the codes are reset it will be fine for a day or two. Codes are reading misfire on 5 and 7 also multiple misfires and running to rich, can someone please help me out with this please. Have replaced plugs and coils and they supposedly did a smoke test and still nothing... thank you

Help us help you better...once again, the most important details about your "X5" is missing. Please consider creating a signature that has your model/model year/build date. The E53 X5 has multiple models/engines/transmissions/parts/etc that change during the production from the 2000-2006 model year.

If you have the 4.4 (N62) engine...do a search using "intermediate levers" as the search phrase...or do a google search using "bmw e53 x5 intermediate levers"...and see if your symptoms match this issue.

If it is fine after you reset the SES light then you have a misfire in which after a while, the computer is shutting down the injector(s). The engine may have a "slight " misfire, but after x numbers of misfires has been registered on the computer the computer will shut down the injector in the cylinder that is misfiring so now you don't have a "slight" misfire, but a misfire all the time. A "Lean Condition" will be classified by the computer as a misfire even though the cylinder is firing.

Originally Posted by Toopricey01

I have a 2005 x5 I have taken it to the BMW dealer and they still can't not fix. Check engine lights flas and at times it will not go over 5 mph, but if the codes are reset it will be fine for a day or two. Codes are reading misfire on 5 and 7 also multiple misfires and running to rich, can someone please help me out with this please. Have replaced plugs and coils and they supposedly did a smoke test and still nothing... thank you

Possibly the oil separator hoses? See this thread for details:

http://www.bimmerfest.com/forums/sho...=oil+separator

They're easy to check and an inexpensive fix if they're the problem.

Originally Posted by Toopricey01

I have a 2005 x5 I have taken it to the BMW dealer and they still can't not fix. Check engine lights flas and at times it will not go over 5 mph, but if the codes are reset it will be fine for a day or two. Codes are reading misfire on 5 and 7 also multiple misfires and running to rich, can someone please help me out with this please. Have replaced plugs and coils and they supposedly did a smoke test and still nothing... thank you

How do you know that the car is running rich? What was the code for the rich condition?

Did they check the spark sensor?

Originally Posted by DTANDJT

Did they check the spark sensor?

What's a "Spark Sensor"?