Cleaned MAFS twice and did a smoke test for leaks with no results. Any ideas? Spark plugs?
SOURCE: 1987 bmw 325 idles rough
I had a similar problem on a 318IS.
The rough idling was accompanied by an occasional whistling noise from the general engine area (caused by air leaks through the front and rear crankshaft oil seals).
The problem was caused by a faulty crankcase ventilation valve (Costs about $100).
The vent valve is easy to replace - (2 screws) - check the vacuum hose that connects this valve back to the tappet cover air vent nipple - it goes soggy and disintegrates.- replace with suitable oil resistant vacuum hose.
While on the job, clean the throttle body / butterfly valve internally with a soft toothbrush dipped in petrol. This cleans off sooty deposits - makes engine idle rpm more consistant.
SOURCE: where is the battery located
Quit looking under the front hood...it isn't there. The BMW and Porsche 928 folks love to put the battery in the back. BMW---in the trunk under the right (passnger side) access panel. 928----rear hatback a little left of center under the spare tire. Genius those Aryans.
SOURCE: where is the battery on a 2004 525i bmw
Passenger side rear quarter panel in the trunk (yeah, in the trunk, believe it or not). Look under the pass side tail light in the trunk you'll see the two screws holding down the cover.
SOURCE: My 2004 BMW 525i won't start (no clicking, slight humm)
starter motor solenoid problem by the sounds of it, check the connections are clean and secure, give it a tap with a soft head mallet or hammer handle. If it doesn't spring back into life it will need replacing.
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