United Bimmer Community - BMW Forum

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tauki

11-02-2010 01:52 PM

flactuate

Hi everybody,I have these hesitation problem.I've checked vacuum leak & it's ok.I've changed MAF but stil.can anybody help me.

Big Evil

11-05-2010 12:42 PM

If there's no vac issue or air leaks I'd be moving on to fuel filter followed by fuel pressure if the filter doesn't take care of it.

tauki

11-06-2010 02:28 AM

flactuate

thanx man,I've changed fuel filter,chacked pressure.but stil

Big Evil

11-12-2010 10:32 AM

Then there's something that got missed. Did you smoke the vac system to test it? How about checking/cleaning the ICV? Does it have a check engine light or any codes (maybe an o2 sensor is getting weak).

tauki

11-14-2010 10:15 AM

flactuate

thanx man,I put the car on diog machine.it shows 2 foult 1to3 o2 sensor & maf sensor.so which 1 is probably a calprit?

Big Evil

11-19-2010 01:34 PM

Could go either way since they both have to do with air/fuel mix. If you've never done an O2 I'd start there and see what happens. They do wear out and BMW recommends replacing them as a part of normal service

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