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3.1 Injectors in a 96 3100

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  • 3.1 Injectors in a 96 3100

    anyone know if the 3.1 injectors will work in the 3100 in a 96 Grand Prix? I am having a sputter issue and to me its leaning toward injectors. thanks
    Robert
    ---------------------------------------------------
    96 Grand Prix SE 3100 202,000 miles
    New Rebuilt 3100
    New Rebuilt 4T60-E
    Exhaust
    Drilled/Slotted Rotors


    95 Grand Prix GTP 177,000 miles
    White
    3" Magnaflow Catback
    Lowered 2" Eibach in front Brichmount Rear
    94-96 Hi-Po 5 Stars on 245/50/16


    90 Pontiac Turbo Grand Prix
    5 Speed Swapped
    127,000
    Spec Stage 3 Clutch
    230,000 mile Getrag 282
    Emissions Deleted
    Brand new Engine 1,000 Miles
    Fully Custom Built car

  • #2
    Yes, they will work. Pretty much all injectors from GM engines are interchangeable (given the same flow rate) up until they came out with the Multec II's, which are a lower impedance.

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    • #3
      ok thanks very much
      Robert
      ---------------------------------------------------
      96 Grand Prix SE 3100 202,000 miles
      New Rebuilt 3100
      New Rebuilt 4T60-E
      Exhaust
      Drilled/Slotted Rotors


      95 Grand Prix GTP 177,000 miles
      White
      3" Magnaflow Catback
      Lowered 2" Eibach in front Brichmount Rear
      94-96 Hi-Po 5 Stars on 245/50/16


      90 Pontiac Turbo Grand Prix
      5 Speed Swapped
      127,000
      Spec Stage 3 Clutch
      230,000 mile Getrag 282
      Emissions Deleted
      Brand new Engine 1,000 Miles
      Fully Custom Built car

      Comment


      • #4
        It will not run right. The spray pattern is different.

        I tried using 3100 injectors in my 3.1 and it ran like crap.
        Taylor
        1988 Olds Cutlass Supreme 3100 MPFI
        1990 Pontiac Grand Prix STE 3.1 MPFI
        1994 Olds Cutlass Supreme convertible
        1998 Lincoln Mark VIII
        "find something simple and complicate it"

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        • #5
          This is just a guess from what I've been told about the different injectors, but I would imagine that it would run, but would run lean. If thats the case then a computer tune would fix that but for the money you'd spend to get your computer tuned you could probably get some used 3100 injectors. You could also send the injectors away to have them cleaned and tested.

          Here's the link to the article : http://60degreev6.com/showthread.php?t=25017

          And here's the home page of the place that does it : http://www.witchhunter.com/
          Last edited by TazMan; 08-02-2007, 02:34 AM.

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          • #6
            3.1 injectors are lower flow rate that 3100 ones. If you need a set I have a few lying around.

            Got Lope?
            3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
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            Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
            12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

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