Just bought a 1999 528i and is in good condition...Just had to remove intake mainfold to replace upper heater pipe changed oil and spark plugs now i have an erratic idling problem when i stop at lights or after going above 50mph...Also when i initially step onthe gas i hear and feel a slip like maybe an air pocket in the gas pedal....what oh what could this be...i'm stumped please help!!!
It sounds to me like you have a vacuum leak somewhere. This is exactly what happens when you have a vacuum leak. First thing is to check all the hoses, especially the ones going to the ICV...second...did you replace the intake manifold gaskets? at 170k miles that's pretty much a must.
__________________ Kyle Sutherland
1995 BMW 540i/6: The Calypso Beast Vid 0-70ish 1987 BMW 325es: Face & Butt Lifted/M50tu Swapped*Sold* 1985 VW Scirocco: Too many mods, money pit*Sold* E34 Plate Filler Wanted!
You should check all of the hose connections you removed to make sure they are tight.
Your service engine light may also come on, to indicate you have a lean cylinder mixture, as air may be bypassng your mass air flow meter
If you have a leak at your manifold joint and you can't hear it or find it easily, you can take a can of starter fluid and spray where you think the leak is, you should hear a noticeable change in the idle speed.
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