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  1. Jeffro87

    There is L29 power to be made...

    I did the swap 411 swap, bosch injectors blah blah. I can make this a raped ape (considering black box pcm) or actually grab 13mpg out of it. 10-11mpg at best in 20 years i have owned it. BUT I have not been able to find a tune that allows it to idle smooth at start-up , occasional start-up...
  2. Jeffro87

    HP tuners.

    I am running 454 stock with 4l80, got it to run well with transmission shift points tweaked, however the faster i can get it, the more i cant get it to idle properly.
  3. Jeffro87

    0411 swap done, truck runs great , need wiring info

    Nevermind ,found the time to figure it out.
  4. Jeffro87

    0411 swap done, truck runs great , need wiring info

    don't regret the swap, day and night. however would like a detailed instruction on egr and range selector wiring fix. looking for good instructions, but everyone seems to be trying to contact someone else for it. Can someone link me to this info please? Thanks!!! Update: I have 96 pinouts btw...
  5. Jeffro87

    Electrical - Anyone make sense of this..? where you at Skylark

    Some items ive seen rarely cause this, multifunction switch, dome override, i saw tape on cable to starter maybe shorting to frame?
  6. Jeffro87

    Vortec 5.7 sounds 180 degrees out of time

    Failing coil, or you have contamination in distributor, is it pulling oil up into cap?
  7. Jeffro87

    Won't start

    If its an old school starter, replace it, double check the spacing at the flywheel gear. Or upgrade to a gear reduction and ,again, check tour gap at gear. Make sure your grounds , all of them are good.
  8. Jeffro87

    Th-400 to 700r4

    Plug is for lockup and need a place for line pressure cable, that leaves good adjustment. I ran mine behind a1987 383 monte ss for 15 years with 0 issues without lockup. Ran a hefty cooler. Never overheated. Would, however, tryto get it wired properly.
  9. Jeffro87

    Yet Another 411 tuning question

    Thanks for the reply, i know there are many sources pointed out, some ive found that arent mentioned here, so im just trying to get personal experiences from members that went well. That shift problem may be fine tuned at the valve body? I also need to get into a 2017 f250 platinum diesel ...
  10. Jeffro87

    Yet Another 411 tuning question

    Hi, poked around forum and found isolated opinions on this. Have the perfect 411 for my 96 7.4, new connectors , and a service manual with supplements on the way. My question is for successful 411 guys, who or what did you use to tune it?
  11. Jeffro87

    5.7 vortec vs 7.4 wiring question

    never mind, just bought a 411 ecu.
  12. Jeffro87

    94 K1500 5.7 - Can’t Figure Out Code 43!

    I know those old single pins used to collapse, corrode or fall apart.
  13. Jeffro87

    94 K1500 5.7 - Can’t Figure Out Code 43!

    Corroded knock sensor wire? Need a pigtail maybe? Are there two ks on this truck? The jumped plug looks like a pressure switch for a/c.
  14. Jeffro87

    5.7 vortec vs 7.4 wiring question

    Am trying to diag a tach signal loss to ip, now serial data loss. When comparing powertrain wiring between 5.7 and 7.4 . I noticed injectors #3 and #4 , pins b31 and b32 are swapped. Is this a misprint? Which is correct? I have a 5.7 ecu i am considering replacing my possibly failing pcm. Any...
  15. Jeffro87

    12200411 PCM swap for 1996 to 2000 GMT400 trucks

    Anyone have 1996 c3500 7.4 vortec pinout ?
  16. Jeffro87

    454. Vortec max miles you would go?

    Ran mine from new(ISH) , nothing but delco filter and mobil1 to 165k, open up for rebuild and the gods shined on me. Engine was not even tarnished. No cylinder or valve wear. Not even piston rocking. Good even compression. These motors are fantastic with good maintenance.
  17. Jeffro87

    hvac box

    The dash change for upper duct work like said is different. There is an adfitional harness added to the passenger side in 94 or 95?, not sure if there is a clearance issue. I transferred a 96 into a 97 and the hvac harness and relay mounting is different. Not sure is this helps you though.
  18. Jeffro87

    Stepside Bed Rail Repair

    Wow, hard work and some real dedication paying off, good work! I have a new appreciation for Florida corrosion today.
  19. Jeffro87

    New from florida

    Hi, My name is Jeff, I am a musclecar owner, recently started getting hooked on my trucks. I had to retire my 1996 c3500 after 2 decades of reliable service, due to crossmember rot. I rebuilt the 4l80,454 and transplanted it into my short 1997 c1500. Love it. Anyway, i dont own a cell phone or...

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