Question about 1994 Toyota Pickup

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Truck has a miss at idle and all rpms

I can hear the miss at the exhaust but can't notice it so much under the hood. jumped the diagnosis terminals under the hood and the code thrown is 2, 4, 3, 1 (2 flashes, 4 flashes, 3 flashes, 1 flash). I've changed the plugs and wires and mass air flow sensor. I started having this issue the day after the last time I got gas and haven't driven it since. any help? thanks

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  • fullcircle79 Mar 01, 2009

    is it at all possible that there's water in the gas?

  • noel_lown Mar 18, 2009

    i have the same problem

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I believe you have two separate codes; 24 and 31. 24 is "open or short in intake air temp sensor circuit" and 31 is "open or short in airflow sensor circuit at idle". These sensors may share a common ground so I would check that as well. You could also try putting a stethascope or (long screwdriver with your ear at the other end) to each injector and see if all are clicking like they should.

Posted on Mar 01, 2009

  • David Melrose Mar 03, 2009

    Yes, it is possible but unlikely that there is water in the gas. But most gas today has some (usually 10%) ethanol in it. The ethanol attracts water and binds the water to itself. Its the same stuff that used to be called "fuel dryer" and adding methyl alcohol or ethanol to your tank helped get the water out of "bad" gas. If your tank had that much water in it, your car would run pretty rough yet would not drop any diagnosis codes except the one for random misfires.

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http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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This will help.

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