still reving too high

Discussion in 'Technical' started by maverick75, Jul 16, 2006.

  1. maverick75

    maverick75 Gotta Love Mavs!

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    Well my 289 has been giving me reving problems ever since i've had the car.

    I rebuilt the carb and nothin it still idled crazzy.

    So i borrowed my neighbors carb since he wasnt using.

    and i tried to adjust to get the idle lower but if it drops below 1,500 the engine dies.Sometimes it will drop down to 1,000 and still run but i cant seam to get it @ 600rpm.

    any ideas?


    thanks
     
    maverick75, Jul 16, 2006
    #1
  2. CornedBeef4.6L

    CornedBeef4.6L no longer here

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    First thought is base ignition timing is off. It needs to be corrct before you can set your idle properly.
     
    CornedBeef4.6L, Jul 16, 2006
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  3. maverick75

    maverick75 Gotta Love Mavs!

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    My uncle set the idle on it, and he checked it and said its correct.
     
    maverick75, Jul 16, 2006
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  4. dmhines

    dmhines Dixie Maverick Boy

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    If it revs too high and dies at low RPM you probably have a nice vacuum leak to find ... something to do what you saying would need to be like an EGR or PCV leak ...
     
    dmhines, Jul 16, 2006
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  5. CornedBeef4.6L

    CornedBeef4.6L no longer here

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    Vacuum leak......
     
    CornedBeef4.6L, Jul 16, 2006
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  6. maverick75

    maverick75 Gotta Love Mavs!

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    Hmmm PCV hasnt been changed in 15 years, egr plate in not hooked up,or blocked off:slap:

    Thanks(y)
     
    maverick75, Jul 16, 2006
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  7. PINKY

    PINKY .....John Ford.....

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    thats what I was thinking...vacuum
     
    PINKY, Jul 16, 2006
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  8. 71gold

    71gold Frank Cooper Supporting Member

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    vacuum... a nice way to say his motor "sucks" :yikes: ...frank...:bouncy:
     
    71gold, Jul 16, 2006
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  9. PINKY

    PINKY .....John Ford.....

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    :biglaugh: :biglaugh: Thats funny right there, I don't care who you are!
     
    PINKY, Jul 17, 2006
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  10. eztony

    eztony Member

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    I had the same thing with my '72 302. Ended up being vacuum leak. I replaced every single hose I could find in the engine compartment and it did not fix it. The bad hose was at the rear of the C4 tranny that runs into a hard line to the engine compartment. Since changing that, it has run a lot smoother.
     
    eztony, Jul 17, 2006
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  11. ShadowMaster

    ShadowMaster The Bad Guy

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    Uhhhh...so why didn't you set it? That way you will know it's right.

    Oh yeah.....vacuum leak like everyone else said.
     
    ShadowMaster, Jul 17, 2006
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  12. Texas 71

    Texas 71 Member

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    If it has power brakes the booster could be leaking vacuum also. This however would usually result in a hard brake pedal. If it is running at 1000 rpm or so it should be a rather large leak. If you can't find it try spraying a little wd-40 around the vacuum hoses and the intake gaskets possibly and if it smooths the idle out you have found your culpret.
     
    Texas 71, Jul 17, 2006
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  13. Comick76

    Comick76 Grease Monkey

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    I concur....Vac leak
     
    Comick76, Jul 17, 2006
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  14. maverick75

    maverick75 Gotta Love Mavs!

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    well i still havent gotten new glasses in 6 months(lost 2 pairs):slap:

    i'll be replacing all the hoses with new ones,but i wont fire it up until i get my 4bbl:bouncy: next month.



    Another Q:were does the booster hook up on the tree?

    Some diagrams say on the side, but some say on the top:huh:
     
    maverick75, Jul 17, 2006
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  15. Texas 71

    Texas 71 Member

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    The booster hooks basically anywhere on the tree it will fit. The tree just distributes the vacuum between whatever is hooked to it. Most of the trees I have seen have the large port (the one for the booster) on top.
     
    Texas 71, Jul 18, 2006
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