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Thread: PCM Electronic Wizards and DTC Codes

  1. #21
    Senior Member Grass-Passer Hood's Avatar
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    Not sure if you want to bring it to me in Luling but I can do your "custom" cat jumper pipe next week. I should have my lift installed this weekend.
    Gary Hood
    CMC #20
    OH WOW! Racing

  2. #22
    Senior Member Carroll Shelby Fbody383's Avatar
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    Quote Originally Posted by Hood View Post
    Not sure if you want to bring it to me in Luling but I can do your "custom" cat jumper pipe next week. I should have my lift installed this weekend.
    I'm probably gonna break out the sawzall this weekend, get an appropriately sized muffler, and weld it up. I'll probably add a new driver side panhard bar mount and reinforce the upper panhard support bar while i'm at it.
    #39 CMC Camaro
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  3. #23
    Senior Member Grass-Passer Casey_SS's Avatar
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    Yeah, your logs looked perfectly fine. All the sensors are doing their job and reading normally, indicating a "mechanical" i.e. non-computer related issue. The fact that it ran good cold and then started screwing up made me automatically think something was changing when the PCM went into closed loop mode but I couldn't find a smoking gun in the logs at all. Bad cats could do the same thing though as they warmed up and made the clog worse. I think that's a pretty logical next step and a "safety" upgrade regardless in case you find yourself parked on some dry grass against your will
    2012 NASA-TX American Iron Champ
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  4. #24
    Senior Member Grass-Passer rleng1's Avatar
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    Tomball Muffler & Brake - $100.
    major tool used - Sawzall & welder
    At the least, remove the cats, and knock the membrane out of them, and remount the hollowed out cats. See if it runs.

  5. #25
    Senior Member Carroll Shelby Fbody383's Avatar
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    Quote Originally Posted by rleng1 View Post
    Tomball Muffler & Brake - $100.
    major tool used - Sawzall & welder
    At the least, remove the cats, and knock the membrane out of them, and remount the hollowed out cats. See if it runs.
    Oh it will "run," in the sense that will move the car. I figure if I'm going to the trouble to get the exhaust out and cat cut out, I might as well put a muffler in. Then I'll sound cool like all the other mid-pack slackers.

    Quote Originally Posted by casey_ss
    I think that's a pretty logical next step and a "safety" upgrade regardless in case you find yourself parked on some dry grass against your will.
    I'm pretty good about getting into the grass on my own.
    #39 CMC Camaro
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    CMC-NT01 FTW!

  6. #26
    Senior Member Grass-Passer rleng1's Avatar
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    Dude, I up'd your off in turn 1 at TWS on Sunday. Look at #84 Sprint's last vid at about 12 mins.
    I go off big and deep right in front of Mitch. I got to a point where I had to make a decision to go around the building or in front of the building.
    Either my cool shirt leaked or I messed myself.

  7. #27
    Senior Member Carroll Shelby mitchntx's Avatar
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    Quote Originally Posted by rleng1 View Post
    Dude, I up'd your off in turn 1 at TWS on Sunday. Look at #84 Sprint's last vid at about 12 mins.
    I go off big and deep right in front of Mitch. I got to a point where I had to make a decision to go around the building or in front of the building.
    Either my cool shirt leaked or I messed myself.
    I thought ... wow, you go Randy.

    He was driving it in DEEEEEEP.

    Then ... where'd he go?

  8. #28
    Senior Member Grass-Passer rleng1's Avatar
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    The inner Randy

  9. #29
    Senior Member Carroll Shelby Fbody383's Avatar
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    Backpressure ~ too much of a good thing can be a bad thing

    BACKPRESSURE

    So I drop the exhaust; I needed to check on the cat and it would give me a chance to pretty up the turndown I welded on a couple years ago.

    I picked up the Y-pipe and cat assembly and it sounded like a case of spray paint. I didn't think they were supposed to do that. I'm taking her down to Grandsport Speedway next Sunday for a little caress/test -n- tune.

    *** FOR SALE: One catalytic convertor refill kit ***

    Since the beginning of time, men have often ascribed certain female traits to their cars; usually dealing with beauty and temperment.

    This B$tch is pissed.

    It may be the first time in a long time the motor has not had excessive back pressure. I may be joining the Proctor Fire club at Hallett since I know from the scans it goes rich off throttle.

    Good news for you guys is the new motor will get to wait until next year.
    #39 CMC Camaro
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    CMC-NT01 FTW!

  10. #30
    Senior Member Grass-Passer Hood's Avatar
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    Quote Originally Posted by Fbody383 View Post
    I know from the scans it goes rich off throttle.
    Which is why your cat has no more lives... unburned fuel completes combustion in the exhaust and is a death sentence to the catalyst.

    At any rate, you may blow your dyno numbers with this fix.
    Last edited by Hood; 05-15-2011 at 01:41 AM.
    Gary Hood
    CMC #20
    OH WOW! Racing

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