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car is stalling

Discussion in 'The Venerable Q-Jet' started by cheveegurl, Sep 21, 2006.

  1. cheveegurl

    cheveegurl New Member

    I got a 4bbl Q-jet that has been rebuilt. It starts up fine and runs good, but after it gets warmed up it will stall out when I slow down or come to a stop. It had the same problem before it was rebuilt. Can anybody Help Please!!
     
  2. GS464

    GS464 Hopelessly Addicted

    Hey Gurl!

    Kind of hard to help with specifics as we would need more info to get closer to the actual problem - BUT!

    Do you know it is a carb problem? What led you to rebuild yours? Is there a vacuum leak? If you don't have the correct carb to intake gasket, 99% chance of a vacuum leak. Is there a vacuum hose loose, possibly the PCV hose?

    Does it smoke once it is warmed up? Exhaust smell bad? Q-jets have a long history of leaking from well plugs underneath the carb. There are only a very few ways to fix these correctly and all involve removing the carb.

    Does it run hot once it warms up?

    When is the last time it had a tune-up and the ignition timing, etc. all set properly?

    Have you tried adjusting the idle speed?

    Is the carb restricted for air? I mean, how dirty is the air filter? Does the air cleaner housing sit too close to the top of the carb? Does the insulation from the hood hang down and plug the stock air filter housing?

    Any work done before it started to act like this? Did it just suddenly start this or gradually work up to this?

    Any other drivability problems?

    As you can see, there are lot's of reasons this could be stalling. Something as goofy as a dead alternator, weak battery and low voltage put a halt to the fun one night for me. Another time was a vacuum leak after working on the car with a "helper". :Dou:

    Phil
     
  3. Truzi

    Truzi Perpetual Student

    This is probably not the problem, but I once had a bad float cause a similar problem. The float was swollen and wedged in the bowl when it was full (keeping the needle valve closed)... just a thought.
     
  4. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    Make sure the choke is not sticking on
     
  5. junglejim75

    junglejim75 Well-Known Member

    So is it running good until it reaches temp, then dies until it cools down? Did you change the gas feed lines to where the fuel is getting too hot in the lines/carb and the fuel is "boiling"? :confused:
     
  6. cheveegurl

    cheveegurl New Member

    thanks for the help

    Well I rebuilt the carb because it was doing the same thing. But I wasn't measuring the float correctly. So I took back apart and fixed the float. Problem fix!!!! :)
    The reason I new it was the carb is because the only way I could get it started again was to put my hand over it (choke it) Or wait till it cooled down.
     
  7. GS464

    GS464 Hopelessly Addicted

    I assume then that the float was way low? Otherwise, vacuum leak.
     
  8. Truzi

    Truzi Perpetual Student

    Cool. It's always nice to hear it was an "easy" fix.
     
  9. speed70

    speed70 Henderson Driveline, Grafton OH

    After reading your first post my initial thought was to make sure the float is new and set correctly but it figures....too late as usual! :laugh:
     
  10. cheveegurl

    cheveegurl New Member

    the float was Way low

    Yeah when I measured it the first time I thought you just hold it down with your finger till its level then measure it. But i didnt know you push it just untill it seats that little needle. :Dou:
    Well that won't happen again!!!
    Again thanks for the help :TU:
     

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