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1994 Mazda B2300 Question: Fuel pump sometimes won't start



jaunalso, 2.3L 4 Cylinder, Gastonia, NC, November 12, 2010, 12:30

This is not a question but some information that I want to share. I had trouble for about two years with the fuel pump not starting, sometimes, for days at a time. I spent a lot of money having diagnostics and work done, but no-one could find the problem.

I discovered that a chip called PCM and the relay for the fuel pump, in the black plastic box located under the hood, needed to be changed. Total time was about 2 minutes and the total cost was $52.00. Problem solved.

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  • Answer #1

    November 12, 2010, 16:56

    Yes, the MAIN relay or PCM/Fuel Pump relay are VERY common causes for an intermittent no start because the fuel pump is not being energized.
    It amazes me how many shops still don't know about this when it is widely posted on Technician Repair Sites such as IATN ( International Auto Technicians Network ).

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