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Thread: TBI Chips .com help! i need a drivable truck soon

  1. #16
    Fuel Injected! kingcat400's Avatar
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    what he said

    "From 1-2 was pretty minor. Your long term fuel trim numbers were running pretty consistently rich so I leaned out the chip 12% and should have fixed that issue. Chip 3 I richened the accelerator pump programming 15% to compensate for that 12% that I took out of all the fuel when you tap that throttle and should have correct that problem to where should have given you all the benefits of chip 1 but with better fuel economy.
    "

  2. #17
    RIP EagleMark's Avatar
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    If you get emulation and your laptop has wirelss internet we can remote access your computer and talk on the phone while you see everything I do on your laptop and TunerPro RT. Need to rough in a tune then fire up and tweak idle so it runs right. Then it would provide good data for tuning. Only way to do WOT is Dyno in 1/2 to 1 hour this way. Can remote access at dyno as well.

    I know we may have brought these up but checking.
    Have you ever used a volt meter on the TPS? Should go smooth from about 1/2 volt to 4.5 volts, no spikes or drops.
    No exhaust leaks before or around O2 sensor.
    Vacuum leaks checked yet? How?
    Fuel pressure? Fuel pressure drop when engine revved?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  3. #18
    Fuel Injected! kingcat400's Avatar
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    ok i have wireless at my house and shop but no acces to wireless while driving. i am going to have tbichips do one more and if i see no major improvement i am going to try and get money back.

    i checked the tps with the logger but not a dmm
    i went trough and checked for leaks after it had ran for a bit but i will recheck after i drive it tomorrow
    i did not check but i am pulling solid vacuum at idle and while driving and accelerating( i have a gauge installed)
    fuel psi is at 18 and does not fluctuate much on no load acceleration.

    i am also going to talk to a guy that owns a dyno and does a lot of racecar work tomorrow t see about using his dyno

  4. #19
    Fuel Injected! kingcat400's Avatar
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    ok here is the log for chip 3 and also another log of chip 1


    would it help if i tried to log the stock chip
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  5. #20
    RIP EagleMark's Avatar
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    Quote Originally Posted by kingcat400 View Post
    would it help if i tried to log the stock chip
    Probably! What is the BCC/four letter code on it?

    Does that truck come with an IAT sensor? If so fix it before the log. You could also turn the throttle blade screw in 1/4 turn.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  6. #21
    Fuel Injected! kingcat400's Avatar
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    here is some tunerpro logs from today. this is the last chip i had gotten from brian before i said screw him.
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  7. #22
    RIP EagleMark's Avatar
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    But without having a base bin to start with I wouldn't know what to adjust?

    Spark advance in that log looks good.

    Fueling in history tables looks good.

    Watching INT and BLM is all over the place, from what you have said about the bog off idle and looking at those BLM INT I'd still say it's an AE Acceleration Enrichment issue like earlier in this thread. Without a wide band O2 sensor they are hard to fix without trial and error. You said he fixed it and it got worse? Then worse again? Who knows where it started and which way he adjusted it?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  8. #23
    Fuel Injected! kingcat400's Avatar
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    the bog got better with added base timing. but is still there. i will try to get some logs of the stock chip and also the chip before this one.
    is there anything i should lookout for when running the stock chip

  9. #24
    RIP EagleMark's Avatar
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    Not really, without more timing for vortec heads it won't run well, with 18 PSI and stock VE it's going to be max rich, nothing that will hert the truck, just hurt your fellings...

    Ever get a pop with the bog during accleration?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  10. #25
    Fuel Injected! kingcat400's Avatar
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    ok i will get some logs of the stock one. this motor has never drove on the chock one so i will see how it goes

  11. #26
    Fuel Injected! kingcat400's Avatar
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    this is the stock chip
    Attached Files Attached Files

  12. #27
    RIP EagleMark's Avatar
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    Yeah but you never said what stock chip is?

    Probably! What is the BCC/four letter code on it?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  13. #28
    RIP EagleMark's Avatar
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    Do you have EGR on motor?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  14. #29
    RIP EagleMark's Avatar
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    Is this the same way you have been data logging for these adjusted chips?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  15. #30
    Fuel Injected! kingcat400's Avatar
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    no there is no egr. ya this is the same track i used in most of the tests. only differance is now i brake up the log driving and launch.

    the code is BJYL

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