Some times when i start my car it makes a knocking noise somewhere in the front and goes faster as i accelerate then it goes away, also it just started making a screeching noise and some times the temperature gauge goes to the second line 1/4 away from the red part. what could the problems be?
Could be a few things the vanos timing chain or the guides or your water pump
Could be a few things the vanos timing chain or the guides or your water pump
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SOURCE: Black Smoke and Hessitation when Accelerating
Ther are 2 sending switches at the front of the engine pop them off and look in the ends of the 1 of them has one prong the other has 2 make sure they were returned to the correct unit as they will plug on to each other. I had this same issue it also will effect how the car runs as the 2 prong one goes to the ECM to adjust the fuel mixture when the engine is cold.
SOURCE: bmw air injection pump problem...HELP!
sounds like the secondary air pump has water contamination. If you unplug the connector for the air pump, and check it on cold start, did the noise go away? If the pump is bad, you need to replace the secondary air valve. Sounds like maybe it is contaminated and not seating fully.
SOURCE: 2001 BMW 325i problem: Car runs very rough, but no warning lights
Sounds like a fuel problem , have you changed the fuel filter in a while ? could be the knock sensor or the knock sensor module needs to be replaced.
SOURCE: 2003 BMW 325xi won't start, dashboard and radio go on.
My 2003 325xi died on the highway a few weeks ago, and I thought it was the battery. It turned out to be the alternator, which was an expensive problem to repair. If your battery is new, it could be the alternator, or a problem with the electrical system. I find the BMWs to be too complicated electrically, which often leads to problems! I'd check your alternator...
SOURCE: i HAVE A 1997 BMW 740IL CAR WONT START JUST MAKES
If the battery is good , then you need a new starter.
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