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1990 Ford Mustang GT Question: Check engine light

 

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acase24, Murrieta, CA, March 29, 2011, 06:49
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when on the interstate my check engine light comes on and goes off every once in a while. I just had motor rebuilt new tranny new clutch new O2 sensors I am lost. The only thing I haven't replaced is the fuel pump and fuel filter.

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  • Answer #1

    March 29, 2011, 08:00
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     Master

    if you are changing altitude , the o2 sensors could be reacting to thinner air. it was not uncommon for obd 1 systems to re act like this.
    have it double checked at a shop to confirm.

    Roy

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    acase24, March 29, 2011, 08:09
     Rookie

    The altitude isn't changing. It started after heavy rain but on the coast here there is no change in altitude

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    Visitor, March 29, 2011, 08:41

    ok, then you need a shop to pull the code with an obd 1 tester to get the code and diag it to determine the issue. if you give me the code, i can guide you from there.

    Roy

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