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Thread: 89 2.6l carb problems! Help!

  1. #1

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    89 2.6l carb problems! Help!

    So I just got this truck running after a while, I put another motor in it, and runs great again.
    I used the original carb because the one on the new motor was seized.
    So it's running like it did before.
    If I only use 1/4 throttle it drives around great!
    Starts great and the choke works good.
    But if I give it anymore throttle it seams like it hesitates and you feel the truck slow down and if you floor it then it will just slowly accelerate. So lack of power "bad! As in on a freeway on ramp I only hit 40mph by the time I'm on the freeway"
    So I need someone to help me because I am a complete noob at carbs. I can do anything else. And I am a visual learner. I have a Haynes manual and it's like Spanish to me.
    Anyone near ogden utah area?
    It has new plugs, wires, cap and rotor, ignition timing set to 5*, new air filter, cleaned egr and ports, all vac lines are good "even in the litte silver box on fender".
    New clutch, syn oil change, trans fluid, clutch cable adjusted, throttle cable adjusted correctly!
    I just don't know carbs well enough.
    I would like to stick with an oem carb because I want this truck to stay original.
    Any help would be fantastic! Thanks!
    Here's the truck

  2. #2



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    sounds like a vacuum leak - spray carb cleaner around the base of the carb and the intake to head area - if idle changes, you found the leak.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  3. #3

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    Oh I also replaced the manifold to carb gasket.
    But I will try that! Thanks!

  4. #4



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    Be sure you connected the right vacuum hose to the distributor for advance. Check your timing if you haven't yet, can't expect the new motor is setup right. Make sure choke is not partially closed also, restricting some air flow.
    Keep an eye on dripping oil with the synth change. The synth oil is so good it can find ways to leak. If you had a leak, if will make it worse. But should be ok. Synth also cleans deposits, which also can cause little issues around the engine. If it survives the change without a problem you should be home free on that.

  5. #5

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    I took pics of vac lines before disassembly.
    And I'm positive they are right, but I can double check.
    I replaced the oil pan gasket while I had the engine out since it was out in the open haha
    But the truck runs exactly the same from when I first bought it with original engine.
    And now literally everything has been changed but the carb so I just suspected that it's a carb problem.

  6. #6



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    Plugged fuel filter. Plugged needle and seat. Float level set to low. Accelerator pump not working correctly. Plugged main jets. If you don't need to SMOG it get rid of that carb. There junk. Or it could be a bad fuel pump.
    Last edited by camoit; 03-30-2015 at 05:48 PM.
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  7. #7

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    Ok so just for the heck of it I switched the two Vacumme lines going to the distributor and it runs better! I'm actually going 65 by the time I hit the freeway.
    But it you can still slightly feel a miss or something. So I think I still need someone to tweak with the carb.
    I did replace the fuel filter less than a year ago.
    I wanted to replace the file pump just for the heck of it and being original.

  8. #8

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    Ok so I'm checking the distributor.
    Is this right?
    The #1 piston is at top dead center from a compression stroke and the rotor is pointing at #1.

  9. #9

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    By the way, it started doing it again, so I looked in the mirror and saw black smoke when it would bov down and hesitates.
    So it's running rich or missfires

  10. #10

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    Hey I'm in the Ogden area and have learned my fair share about these trucks, no guru but if you need help man just pm me and I'll be more then happy to help where I can!!

  11. #11

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    Ok so I took the truck to my grandpas good freind who knows carbs, so I got a rebuild kit from Oriley auto parts and he rebuilt it and truck runs fantastic,
    Strong, and gets up and goes now smooth all the way to redline "I never do this""test reasons"! I am very satisfied!
    And also, it had 2 bad diaframs.

  12. #12

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    Jason, do you currently have one of these little trucks now? Maybe we can meet up and chit chat about these things? I'm on 12th st.

  13. #13

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    Quote Originally Posted by pennyman1 View Post
    sounds like a vacuum leak - spray carb cleaner around the base of the carb and the intake to head area - if idle changes, you found the leak.
    I was told I had a vacuum leak as well. Any suggestions.

  14. #14

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    Hey Justin sorry it's taken me so long to get back to you! but yes I currently have two of them lol working on them night and day. I can meet you whenever, I'm always up for meeting fellow MM fans!!

  15. #15



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    Replace vacuum lines one at a time. There old and cracked. For a couple of bucks it won't hurt. But I would say you had a problem. Looks like the accelerator pump.
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  16. #16

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    Ya it's night and day difference and getting over 100 miles more to a tank!
    I am very happy with this little truck!

    Jason, you can pm me your number and we could meet up, any others in the area can do the same!

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