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bmwguide.nethttps://bmwguide.net > 3 Series > E46
Jan 17, 2023 - The main fuse box is located in the glove compartment. You will see two white latches (left and right) that need to be turned to open the fuse ...
One night, while driving my 2000 E46 3-Series BMW 323i, I tried to open my sunroof, and heard an omnious loud crunch; it sounded as if my sunroof had ...
Has to b the battery,if you changed the alternator then the batter isnt supplying any power to your sensors and computer. if your battery is weak the car might run at idle, but as soon as your drive your useing more draw. swap out a battery from a friend and you should b good.
Since your check engine light is on, you should try to get it read at Autozone. They will do this for free and it will narrow your search for your problem. It could be a couple of things. It could be as simple as a fuse or clogged air filter to bad spark plugs. Have you did anything to it?
If is for a 3 series compact (318ti most common) then
P2799 is the intake air tem sensor 2
Which would explain the high idleing. Probably a sensor problem (bmw will charge) a competant mechanic should do it easily.
I don't think your trouble is on the ignition side of it but I am sure that you must have a look at the idle speed control(stepper motor).
If with temperatuer your "misfire"changes to better, it means that it's probably running too lean at cold, normally the stepper motor or ISC does this job.
Let us know how you get on.
Cheers.
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