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Thread: Not boosting/slow accel

  1. #1
    gone crazy Turbo Mopar Contributor J&H Ryan's Avatar
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    Not boosting/slow accel

    Well, we thought it was a blown headgasket, but apparently not. 89 GT Lebaron with an 88 TII Engine w/auto. We've checked timing, elec and mech, map, codes, vacumn lines are all new (did same thing with old lines), ran it on the 2.5l and 2.2 TII computers, wastegate can discoed, can hear turbo whine, still nothing. Any ideas?
    Ryan
    92 GTC, TIII
    00 XJ

  2. #2
    Garrett booster
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    Re: Not boosting/slow accel

    Leak in the intercooler plumbing? Broken or disconnected wastegate actuator arm at the swingvalve?

    -Chuck James

  3. #3
    Garrett booster 3nglenn's Avatar
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    Re: Not boosting/slow accel

    Hole or leak (big one) in the intercooler and/or piping (if your intercooled?)

    ^ faster than me...

  4. #4
    boostaholic R/T's Avatar
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    Re: Not boosting/slow accel

    Wastegate arm

  5. #5
    turbo addict Turbo Mopar Contributor Dave's Avatar
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    Re: Not boosting/slow accel

    Gotta be the arm.

  6. #6
    boostaholic
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    Re: Not boosting/slow accel

    Quote Originally Posted by Dave
    Gotta be the arm.
    +1

  7. #7
    gone crazy Turbo Mopar Contributor J&H Ryan's Avatar
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    Re: Not boosting/slow accel

    just discoed the arm and zip tied it both directions (too late for me to remember which direction that works under boost/vac) and nothing. No balls at all. Only thing left is maybe a clogged cat?
    Ryan
    92 GTC, TIII
    00 XJ

  8. #8
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: Not boosting/slow accel

    Could be the cat. I assume you've already checked the piping and I/C for leaks? Also assuming that you know the turbo is good. It's not smoking or anything, right?

  9. #9
    Garrett booster
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    Re: Not boosting/slow accel

    It's gotta be a leak in the intake piping.

  10. #10
    gone crazy Turbo Mopar Contributor J&H Ryan's Avatar
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    Re: Not boosting/slow accel

    Quote Originally Posted by TrrboJeep
    It's gotta be a leak in the intake piping.
    Yeah, it just has the little TI U-hose, so thats an easy check. The turbo spun fine when it was out. What we thought was a headgasket failure was followed by lower oil pressure and slight overheating. We're going to drop the downpipe later and if that doesn't work I dunno..
    Ryan
    92 GTC, TIII
    00 XJ

  11. #11
    gone crazy Turbo Mopar Contributor J&H Ryan's Avatar
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    Re: Not boosting/slow accel

    twas the cat. Solid like a brick.
    Ryan
    92 GTC, TIII
    00 XJ

  12. #12
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: Not boosting/slow accel

    Quote Originally Posted by J&H Ryan
    twas the cat. Solid like a brick.

    That will do it for sure. Finally an excuse to get rid of it.

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