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1990 3.1L MPFI injectors

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  • Wanted 1990 3.1L MPFI injectors

    Need a set of known GOOD 3.1L injectors unless people know the 90 MPFI 3.1's can be replaced by the SFI 94-96 3.1L injectors without any issues.

    I know the SFI 94-99 3.1's were 17lb but I don't know what the MPFI injectors are.

    Scratch the swapping in.. They are 15lb/hr injectors... and the SFI 3100 ones are 17lb/hr

    I could swap it if I could flash the ECU or just deal with the slight correction... it would probably work fine for what I need it to do.
    Last edited by 3400-95-Modified; 08-16-2012, 10:34 AM.

    Got Lope?
    3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
    Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
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    12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

  • #2
    actually, 3.1MPFI(aluminum head at least) are 16.7, the 93-99 3100 injectors are ~17.4.

    at least, that is what i have found documentation on from various sources.
    1995 Monte Carlo LS 3100, 4T60E...for now, future plans include driving it until the wheels fall off!
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    • #3
      Since no one has these I guess I'll just use a set of 3100 SFI injectors and hope for the best and adjust the ECU later when I get some OBDI tools.

      Got Lope?
      3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
      Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
      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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