car stalls when you remove the oil filler cap

1995 MAZDA 626
145,000 MILES
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CRONIES6
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  • 1 POST
Forget to put oil filler cap back on one day. Drove for about 30 miles and started running rough, got to a light and it stalled out. Put cap back on and started fine. While running, took the cap off and it immediately died. Put back on and runs fine. Even pulled out dipstick and noticed a little hesitation in running. As soon as you take cap off, it dies again. Is this a normal thing or bigger problem?
Feb 13, 2012 at 2:53 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the positive crankcase ventilation valve and its system
Feb 13, 2012 at 2:55 PM
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WRENCHTECH
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That would be normal. You are creating a vacuum leak when you do that.
Feb 13, 2012 at 4:20 PM
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