1988 Mazda B2200 Running lean?

Tiny
ERICBWEST
  • MEMBER
  • 1988 MAZDA B2200
  • 230,000 MILES
The truck developed a miss when decelerating or at a constant cruising rpm. I believe that this is do to the truck running too lean. I rebuilt the carburetor and replaced the base gaskets. I also readjusted the mixture setting. The truck ran perfect for about a month and is now having the same issue again. I've checked to make sure everything is tight. Readjusting the mixture does not help either. What else could be causing this problem? What else should I check? Thanks for the help.

Eric
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Wednesday, November 13th, 2013 AT 1:03 PM

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Tiny
ERICBWEST
  • MEMBER
I forgot to add that the truck did recently get a tune-up and a new fuel filter.
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Wednesday, November 13th, 2013 AT 1:49 PM
Tiny
MHPAUTOS
  • EXPERT
The main thing to check for is vacuum leaks and ensure that the carby float height is set correctly, also make sure coil, plugs, leads and distributor cap/ rotor are ok.
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Wednesday, November 13th, 2013 AT 2:52 PM

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