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Thread: 97 c3500HD 454

  1. #11
    Forum tyhee Site Admin GMPX's Avatar
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    Quote Originally Posted by malibu795 View Post
    Same ecm
    Sorry malibu795 they aren't the same ECM's, the 96-97 had one type, then it changed again for 98-00 (the one we supported but have since retired active work on).
    Need official EFILive help, please go here.
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  2. #12
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    Quote Originally Posted by GMPX View Post
    Sorry malibu795 they aren't the same ECM's, the 96-97 had one type, then it changed again for 98-00 (the one we supported but have since retired active work on).
    Can it still have the 411 swap done?

  3. #13
    Forum tyhee Site Admin GMPX's Avatar
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    I don't know sorry, I'm not sure what is actually involved in that process.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  4. #14
    Lifetime Member SS2win's Avatar
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    yes it can. Lextech has the spreadsheet for it. I've done a 97 and a 99.
    2001 Camaro SS #2020
    Stock LS1 w/InconTT | REV Springs | Ti retainers | M6 | McLeod Twin Clutch
    UMI RR K Member | SLP Subframe Connectors | Global West TA | BMR PHB | Metco LCA
    996 Brake Kit| 17" CCW Classics | 17x11 ZR1 Replicas on all four corners

    425@6lbs | ???@12lbs | EFILive Custom OS3 | !MAF | SD
    11.73@12x/1.7 on worn out nittos... yaaawn!

  5. #15
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    Already Sent him a PM..

  6. #16
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    been going through it... been getting lean burn codes on the O2 and 1406, above 1/2 throttle engine tends to lay over on power dragging a 7k trailer and gets more noticeable the heavier I get...
    cant get the fuel system lined out... new filter/fuel pump w/sock/injectors..
    all data has 56-62psi for specs
    key on fuel pressure 46psi
    key off fuel pressure drops almost instantly to 15-20psi
    free rev drops to 40psi from 46psi
    all pressures measured at test port.
    putting a 340LPH pump in the tank will probably mask the problem due to shear volume of fuel sent..
    picked up adapter to swap line to -6 AN to run from tank to engine for supply and return incase one of the steel to hose transitions pealed over and is restricting flow..
    fuel pressure regulator is vacuum controlled
    both FPR and fuel pump are under 12M warranty...getting new FPR tomorrow
    could I have a gotten a bad fuel pump?
    have exhaust (dual 3" ) and 0411 ECM waiting to go one... get one problem fixed at a time...

  7. #17
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    Here's some stuff I do with it.. grossed 25k
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  8. #18
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    upon further parts review.. fuel pump I got is rated at 35GPH and 85psi swapping it out got the 58gph/110psi version

  9. #19
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    Swapped fuel pump hits 62psi with key on then drops to 58psi, used the bigger pump I mentioned

  10. #20
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    after multiple attempts... engine had no power... yanked the MPFI system off, put a MSD 6AL with blaster SS coil billet dis, edelbrock performer intake, fast ezi efi 1.0, oem fuel pump.. also swap to adjustable valve train with 1.7 roller tip rockers. comp cam conversion stud is #4514-16 ~$90.00 since I already did the 0411 swap ill turn all the SES codes off..

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