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BMW Z3 backfires and hesitates

Tiny
ANNEMARIE
  • MEMBER
  • BMW Z3
I have a 1998 BMW Z3 with 125000 miles and 4cyl engine. I take immaculate care of it. Over the past couple days I have noticed it hesitates. Yesterday in 2nd gear - today in 4th then 3rd then 4th again. Its almost like its running out of gas but then it recovers. Today's 4th gear stumble was accompanied by an unholy loud backfire. Yesterday it had been driven awhile before it stuttered, today it was when I first started out. Any ideas? MAF sensor? Fuel pump?
thanks!
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Sunday, September 9th, 2007 AT 5:51 PM

1 Reply

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Check fuel pressure and delivery. Check for a faulty crankcase vent valve PN 11-15-7-501-567. See to that and repost if needed
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Tuesday, March 11th, 2008 AT 1:37 AM

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