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    scott14450's Avatar
    scott14450 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jun 22, 2007, 10:09 AM
    Just replaced injectors, now vehicle idles BAD.
    My 88 Pathfinder recently went into fail safe mode (won't go above 2750 RPMs). The computer code was 51 - bad injectors, although the car idled fine. I cleaned and replaced the injectors, no more error code, no more failsafe mode. However, now the vehicle idles VERY erratically - fluctuating between 1200-1800 RPMs continually. There are no vacuum leaks, fuel pressure is good, ignition timing is good, choke functions. I even switched out computers. What would cause the idle to go so bad immediately after replacing the injectors? I'm baffled...
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jun 22, 2007, 10:36 AM
    Check Ignition RPM Module:

    Zip Code Entry at PartsAmerica.com
    kitch428's Avatar
    kitch428 Posts: 1,440, Reputation: 152
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    #3

    Jun 22, 2007, 02:45 PM
    Sounds like a switched vacuum supply. Look into the map sensor. Sounds like manifold pressue is changing rapidly.
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