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Technical Help with Carburetor/No Start issue

Discussion in 'The Hokey Ass Message Board' started by BigBoltChevy, Jul 24, 2018.

  1. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    In the 6+ months, with less time available to tinker than I'd like, I still have not gotten it started. The other carb was in bad shape, so I bought a NOS one. Here's a video of my attempt to get it to run. Its cranks and fires up, but wont continue running. I'm waiting for an electric choke to arrive thinking it really needs a choke to start, but take a look. The H.A.MB has been incredibly helpful for the beginners like myself.

    Link to Video (too large to post):


    Sent from my SM-N950U using The H.A.M.B. mobile app
     
    chryslerfan55 likes this.
  2. greybeard360
    Joined: Feb 28, 2008
    Posts: 2,079

    greybeard360
    Member

    One thing I noticed was the washer on the front carb stud bouncing around under the very loose nut. Can be a big vacuum leak. Also when cranking it sounds like it is kicking back a little... Too much initial timing.
     
  3. manyolcars
    Joined: Mar 30, 2001
    Posts: 9,192

    manyolcars

    95% of carb problems are electrical. Is your ballast resister bad?
     
  4. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 12,372

    Bandit Billy
    ALLIANCE MEMBER

    That's a pretty hard crank, you sure you got that distributor in right?

    Had it ran previously, sorry if I missed that somewhere
     
    BigBoltChevy likes this.

  5. HUGE vacuum leak.. why don't you tighten that loose stud/retainer on the driver's side of the carb..??? I bet she will run just fine then
     
    Unkl Ian and BigBoltChevy like this.
  6. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    Washer is being blown upwards by the exhaust gas passage in the front of the baseplate for warmup. Definitely could be a major vacuum leak as well as pressurized exhaust getting in.
     
    BigBoltChevy likes this.
  7. oj
    Joined: Jul 27, 2008
    Posts: 6,458

    oj
    Member

    Is it quitting when you release the key from 'Start' to 'Run'? Seems to my you pump gas, engage the 'Start' and it starts while you continue to pump and have by then released the key from 'Start' to 'Run' and even though you still pump gas it shut off. The wire from the 'Run' (ignition) is broken, it is starting because the wire from the starter solenoid is feeding the coil but when the strater solenoid opens the voltage goes away and the coil has no power. Try to run a wire from the battery to the coil and I'll bet it starts and runs, remove the wire to shut it 'Off'.
     
    tb33anda3rd and BigBoltChevy like this.
  8. Truck64
    Joined: Oct 18, 2015
    Posts: 5,325

    Truck64
    Member
    from Ioway

    Good advice above. It does sound like the timing is off one way or another.

    Start with the basics. Did you check for a good hot spark? Verify #1 piston TDC with a piston stop and that this jibes with the "0" timing mark on the damper. Make sure the plug wires are in proper firing order, and the distributor is stabbed correctly, and the rotor points to #1 terminal. These are all very common errors or engine derangements.

    Not trying to beat up on you here, but show some mercy on the starter, solenoid and battery lol. An engine that won't light off will quickly burn up a starter and solenoid, they are really only designed and built to operate for just a second. Allow at least a minute or two of rest for every second of cranking. Starter might not fail right away but extended crankfest will severely reduce its service life. Put the battery on a charger overnight, too.
     
    BigBoltChevy likes this.
  9. KoolKat-57
    Joined: Feb 22, 2010
    Posts: 3,076

    KoolKat-57
    Member
    from Dublin, OH

    With the glass fuel filter banging against the valve cover, the loose carb will be the least of his problems!
    KK
     
  10. Truck64
    Joined: Oct 18, 2015
    Posts: 5,325

    Truck64
    Member
    from Ioway

    Those filters are notorious for starting fires.

    As a general rule, it is a good practice to keep a fire extinguisher ready and available.

    One easy test for over-advanced ignition timing, disable the ignition by grounding the coil wire. See if the engine turns over freely.
     
    BigBoltChevy likes this.
  11. 302GMC
    Joined: Dec 15, 2005
    Posts: 7,870

    302GMC
    Member
    from Idaho

    If somebody sold that carb as New Old Stock, they committed fraud ...
     
  12. Oh my !:(
     
    54vicky likes this.
  13. No offense, but he just can't be helped
     
    54vicky and Unkl Ian like this.
  14. Loose carb and that filter has got to go. How much fuel is in the filter? You may want to do a quick fuel pump volume test, look it up. An electric choke won't be much help and the 2GC has a pretty good choke, get the parts to get it to work. Once you get that far, try retarding the timing as it cranks.
     
    54vicky likes this.
  15. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    Thanks! I plan to go through all the recommendations.
     
    Bandit Billy likes this.
  16. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    Thanks! I plan to go through all the recommendations.
     
  17. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    Thanks! I plan to go through all the recommendations. Yes, the shipping company drove it onto the truck when being delivered to me. The starter was cracked once it arrived, and I had the hardest time getting any action out of it. Once I was able to figure out the starter was cracked (After I replaced some of the cruddy wiring), I then moved on to the next "thing".
     
  18. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    Yep, I have my fire extinguisher ready and available, and I keep a wet towel around when I've tried to use prime the carb to get it to start. Great suggestions that I previously saw in another posting on the H.A.M.B.
     
    Truck64 likes this.
  19. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    Could've been lying to me!!! But it's a LOT better than the one that was on it.
     
  20. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    Will be doing this also. Thanks for taking the time to provide recommendations. The other 3 are tightened well, but this 4th is in a place that's nearly impossible to get to. I was obviously wrong to thinking it perhaps didn't matter.
     
  21. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    Thanks! Many of you are recommending to get rid of the filter and tighten down the 4th stud on the carb. Plan to do both those first. The carb utilizes a hot air choke. I'll do some more homework to see if I can figure out what the connections look like/required to go that direction. The carb I removed was in pretty bad shape, and didn't appear to be the one that was on it for the year. Thanks a bunch.
     
  22. BigBoltChevy
    Joined: Jan 10, 2013
    Posts: 17

    BigBoltChevy
    Member

    You're insight is very helpful. Thank you. The starter/solenoid was my planned "next" issue to address once I got it started. This a "NOS" solenoid as the last one was cracked and stopped working all together. When I turn the key, sometimes it just "spins". that's just to say, I can hear what sounds like the starter just spinning, without engaging the flywheel. So I have to "bump it" sometimes until I hear/feel it engage. Then It attempts to start. I know this has to be addressed/resolved, and planned to start trying to figure things out after this non-starting issue. Again, thank you so much for your advise. You and the other members who take the time to provide constructive feedback/recommendations is INVALUABLE. I hope over time, I'll be able to gain the knowledge that I may share with someone later as well.
     
  23. Carb isn't bolted down properly.
    Shitty fuel filter is a fire waiting to happen.
    What other half assed bullshit is going on ?
    Quit fucking around.
     
    54vicky likes this.
  24. In your video it looks like the choke is trying to close after the engine starts. If this is taking place in Texas somewhere, I'd guess there really isn't much need for the choke once the engine starts running. It may be flooding the engine nearly as soon as it starts. Before throwing any money at the choke, study the choke linkage and try to figure out a way to wire the choke valve open, temporarily at least.

    This will at least give you a chance to get the idle speed and idle mixture somewhat adjusted. And save your battery and starter a bit of extra stress.

    Some folks might say to just prop the choke open with a screwdriver but there's always a chance of it dropping too far down in the throttle bore and also propping the throttle plates partially open.
     
    54vicky likes this.
  25. thomas.parker197
    Joined: Dec 29, 2017
    Posts: 52

    thomas.parker197
    Member

    That choke should be hooked up to the exhaust manifold, couldn't tell if it was or not. I would definitely wire the choke opened. May want to check the online manual for that early rochester 2gc. It mat indeed be NOS, but is almost certainly remanfactored. Have you set the idle mixture screws?

    Sent from my SAMSUNG-SM-G900A using Tapatalk
     

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