Automotive/low revs in bmw520i

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Expert: Sean Halliday - 5/7/2007


Question
hi hows things my question is i have a 98 bmw520i and its started to cut out the revs just stop when i slow down  

Answer
Sounds like the EGR or a PCV blockage.Check all vacuum lines and if it doesnt help ,look at the idle air control or the MAF sensor.Disconnnect the MAF  sensor first and see if the idle speeds up if it does then thats the problem.The MAF is in between the air filter and the throttle body.

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Sean Halliday

Expertise

general auto repair,japanese,bmw,mercedes,mini cooper 1960/2009,general british cars,ford.I DO NOT work on automatic transmissions.Manual transissions i install clutches only.Many people ask me to diagnose noises from their cars,unfortunately i cannot do this unless i hear it.As you appreciate,vehicles can and will make a variety of noises.I DONT UPGRADE or fit aftermarket performace kits,parts,chips,only replacement parts.

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40 years experience on all general auto repair.

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