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Thread: Esplain ECM programing to me

  1. #1
    Tommy sucks Sharpe's Avatar
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    Esplain ECM programing to me

    As some of you know, the slow-fitty-fo in my crewcab has been giving me **** for about a year. I've replaced everything ****ing thing that is considered replaceable and its still being a *****. The main problem right now is intermittent hard starting. Most mornings, when there is no one around and I'm going to work, it will fire right up. Later in the day (particularly when there are alot of people around) it usually takes 5-10 seconds of cranking to fire up. Then people laugh at me. It sucks. I'm going to do a compression test this weekend but it doesnt burn any more oil than "normal" and runs fine once going so I'm skeptical that that is the problem. Clarke speculated that the computer might be FUBAR because they have had similar problems with cars at Lance's shop and swapping out the ECM has usually fixed it.

    My ECM says "remanufactured by GM" on it so it has ****ed up before. The part number is 09366810 and a new one costs $284.20 from GM (Rockauto is ~$220) and still has to be programmed. The parts guy I talked to said I could take my truck to a dealership and have them diagnose it, but I get the feeling that will end up being a "There is nothing wrong with it, that will be $200." Is there anywhere else in town that can do this kind of diagnostic scan (Flemco)? I can easily remove the puter from the truck or take the whole damn thing. It should be noted that my exhaust is completely ****ed up and leaking from prety much every joint as well as a few rust holes in the muffler. It sounds like total **** and is my next priority for fixing but I dont know if that would contribute to the hard start issue.
    On the 8th day god created the Super Swamper TSL and said "go forth and kick ass"

  2. #2
    Registered User uglyota's Avatar
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    Not throwing any codes? Is it consistent that it starts fine in the morning, then won't start later in the day? Crank/cam position sensor?
    Last edited by uglyota; 10-16-2009 at 10:45 AM.
    Quote Originally Posted by Shaggy View Post
    damnit... if everyone is leaving i want my original 15 back... i dont wanna be left with these tools

  3. #3
    Like my rock crawler? KrazyKarl02's Avatar
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    I know on the half tons Chevy put a switch on the oil pressure that would kill the fuel pump. Such that if you had low oil pressure the fuel pump would not turn on. That could be your issue, later in the day when it is hot your oil is not as thick and does not build pressure as quickly.
    -Karl
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  4. #4
    Tommy sucks Sharpe's Avatar
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    No codes, crank and cam sensors have been replaced within the last year. Oil pressure switch has not been replaced but the fuel pump primes when the key is in the hot position.
    On the 8th day god created the Super Swamper TSL and said "go forth and kick ass"

  5. #5
    Registered User uglyota's Avatar
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    Quote Originally Posted by uglyota View Post
    Is it consistent that it starts fine in the morning, then won't start later in the day?
    1 2
    Quote Originally Posted by Shaggy View Post
    damnit... if everyone is leaving i want my original 15 back... i dont wanna be left with these tools

  6. #6
    Tommy sucks Sharpe's Avatar
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    For the most part but sometimes it will fire right up later in the day.
    On the 8th day god created the Super Swamper TSL and said "go forth and kick ass"

  7. #7
    Registered User uglyota's Avatar
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    Try and wiggle the distributor? Seems like timing
    Quote Originally Posted by Shaggy View Post
    damnit... if everyone is leaving i want my original 15 back... i dont wanna be left with these tools

  8. #8
    Rock and Roll AggieTJ2007's Avatar
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    if you come to corpus and bring me some fenders I can read the ECM w/ EFI Live. i can also reprogram a new one if you have to go that route
    Quote Originally Posted by afroman006
    Creighton, you have done stuff with that jeep that would make a goat go "holy ****!"
    Quote Originally Posted by afroman006
    So driving by brail is why your jeep looks the way it does eh?

  9. #9
    Chief
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    Quote Originally Posted by Sharpe View Post
    Most mornings, when there is no one around and I'm going to work, it will fire right up. Later in the day (particularly when there are alot of people around) it usually takes 5-10 seconds of cranking to fire up. Then people laugh at me. It sucks.
    Sounds like an easily fixable problem...





    Oreilly has a good deal on camo paint.

  10. #10
    Rock and Roll AggieTJ2007's Avatar
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    ^^^^ see i like that
    Quote Originally Posted by afroman006
    Creighton, you have done stuff with that jeep that would make a goat go "holy ****!"
    Quote Originally Posted by afroman006
    So driving by brail is why your jeep looks the way it does eh?

  11. #11
    Tommy sucks Sharpe's Avatar
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    So its time to revisit this issue. It has gotten worse and the truck is a mother****er to start prety much every time now. The 7.4L Vortec originally came with Rochester injectors (p/n 17109596) that are A) a ****ty design and B) at the absolute max end of their operating range. I am going to replace my bunk injectors with Bosch units (p/n 0280150973). I have read mixed reviews in this thread

    http://www.fullsizechevy.com/forum/g...ec-owners.html

    about whether a tune will be needed with the new injectors so I might have to hit up Creighton's EFI live. Do I have to buy a subscription or something? I will need to get the EGR and rear O2 sensors programmed out regardless.

    I am going to do *something* with the exhaust too. As far as I know there are no complete kits available for crewcabs of this body style. I dont want to buy headers and I'm ditching the cats. I think I'm going to use the crossover pipe from my stock exhaust and just run new tube the rest of the way. Not sure what muffler I'm gonna run yet.
    On the 8th day god created the Super Swamper TSL and said "go forth and kick ass"

  12. #12
    Chief
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    Mufflers are for pussies!
    2010 VW Jetta - DD, 5 Banger, 5 Speed, 1000 Watts of sound!!
    1979 Ford Bronco Custom - 400/T18/205.. 35" SSRs, 4" lift, Rancho 5000s, 200 watts of sound!!

  13. #13
    Tommy sucks Sharpe's Avatar
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    Quote Originally Posted by Hot Pocket View Post
    Mufflers are for pussies!
    And jettas are for faggots. What's your point?
    On the 8th day god created the Super Swamper TSL and said "go forth and kick ass"

  14. #14
    web wheeler FJAggie07's Avatar
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    So much anger....

  15. #15
    Chief
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    At least my **** runs

    and gets good gas mileage
    2010 VW Jetta - DD, 5 Banger, 5 Speed, 1000 Watts of sound!!
    1979 Ford Bronco Custom - 400/T18/205.. 35" SSRs, 4" lift, Rancho 5000s, 200 watts of sound!!

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