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Projects Hard restart when hot

Discussion in 'The Hokey Ass Message Board' started by IowaTom, Sep 18, 2020.

  1. IowaTom
    Joined: Jul 23, 2018
    Posts: 22


    Guys, I have a '58 Studebaker with a 185 c.i. L-head six and a Carter BBR1 single barrel carb. I rebuilt the carb using a kit from Mike's Carburetors and lately it's become a breath-holding trick to restart the warmed up engine after a brief stop at a store. A friend suggested a bad coil. I replaced mine with a new one from PerTronix when I replaced the points with an Ignitor module. How can I test it? Any other suggestions on what to look for? Thanks!!
  2. jimmy six
    Joined: Mar 21, 2006
    Posts: 7,127

    jimmy six

    Hot starter could be dragging. I had to carry a pump sprayer with cold water for a BBC pickup that acted like that.
    mrfliboy likes this.
  3. xhotrodder
    Joined: Jul 2, 2009
    Posts: 1,596


    Have you checked your compression? Bad compression can cause that, also vapor lock can cause that.
  4. Dooley
    Joined: May 29, 2002
    Posts: 2,660

    from Buffalo NY

    Just had this happen with my sbc
    Check the ground mine wasn't good needs to be right on the block.. Huge difference

  5. Do you mean turns over hard OR does not fire off?

  6. Bob Lowry
    Joined: Jan 19, 2020
    Posts: 228

    Bob Lowry

    Go backwards to diagnose...what was the last change you made before you started having the issue?
    Start there and work backwards.
    ccain likes this.
  7. the oil soup
    Joined: May 19, 2013
    Posts: 182

    the oil soup
    from Tucson,AZ

    Once it's hot and shut off look down the carb to see if the accelerator pump is working, heat soak may be boiling the fuel out of the float bowl. On mine I floor it when it's hot and it will start within a couple of seconds.
    ccain likes this.
  8. oldsman41
    Joined: Jun 25, 2010
    Posts: 1,282


    If it’s turning over and not starting you are probably boiling away the fuel in the carb.use a spacer and wrap your fuel line,if that fails get a small electric fuel pump to start it on then turn the pump off. If it is slow tostart with the starter then check your grounds. Also check your timing
    Truckdoctor Andy and ccain like this.
  9. ccain
    Joined: Jun 13, 2009
    Posts: 411


    I don't know if they still do, but some of the parts stores used to be able to test coils. You might give one of them a call.

    If it's acting like it's not getting any gas, I had that problem with my '60. I mean, I got away with it using the old "gas pedal a 1/3rd of the way down while starting" trick for a while but...

    Make sure your fuel lines are well clear of the manifold, I recently read that the newer gasolines are way more volatile than the old stuff and can cook off quicker, at lower temperatures. Heat soak will boil the gas right out of the float bowl.

    We have a gasoline/ethanol blend here. I dunno what other states are using.
    I DO know, however, that the gas out here in SoCal evaporates away quick like acetone does if you spill it.

    I've read that one way to combat it is to adjust the plenum area of the intake or otherwise isolate the carb from the manifold via some sort of heat sink. Either a phenolic gasket or an aluminum spacer between the carb and the manifold seems to be the standard fix they suggest.

    When I rebuilt my carb, I went ahead and added an Edelbrock 1" aluminum spacer. So far, so good. No more hard hot starts.

    But now my starter is shitting the bed. :mad:
  10. IowaTom
    Joined: Jul 23, 2018
    Posts: 22


    Thank you, Guys! Great stuff!
  11. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 1,323


    Get rid of the intake manifold exhaust heat..

    First thing I would do is put the points back in..
  12. ken bogren
    Joined: Jul 6, 2010
    Posts: 730

    ken bogren

    The 460 in my 61 f100 was like that, could barely turn it over when hot. Probably not traditional, but a starter insulating wrap solved the problem.
  13. flatheadgary
    Joined: Jul 17, 2007
    Posts: 818

    from boron,ca

    if it is a slow drag on the starter put a solenoid from a ford on the firewall and put all the wires on it and one to go to the starter solenoid. this will fix a hot starter.
  14. TagMan
    Joined: Dec 12, 2002
    Posts: 6,049


    I had the same problem. Long story, short - bad ignition coil.
    Elcohaulic likes this.
  15. I haven't seen the answer to the question of whether it cranks slow or won't fire up but cranks ok
    Elcohaulic, 40FORDPU and jaracer like this.
  16. IowaTom
    Joined: Jul 23, 2018
    Posts: 22


    Cranks fine, just won't fire up - sorry.
  17. carbking
    Joined: Dec 20, 2008
    Posts: 2,871


  18. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 1,323


    Is the Pertronix getting power while the key is on start? Run a wire from the battery positive to the coil positive and try starting it when your having this issue...

    I'd put the points back in, set the dwell and leave things alone.. If you want to improve your ignition, install a CD box like the Vertex Z6 or an old analog MSD6AL.. Too many issues with the new MSD.. The points will only be triggering and they will last 50,000 mile easy..
  19. tguptill
    Joined: Aug 12, 2012
    Posts: 55

    from Maine

    After you shut it off look down the throat of the carb and see if it is dripping. Sounds like the float may be a bit to high.
  20. Steves46
    Joined: Sep 23, 2008
    Posts: 417

    from Florida

    If the coil was going bad, wouldn’t it fail once the engine is warmed up and still running? Had the same problem with 55 F100 and it turned out being my carburetor float level was set too high which caused the gas to flood upon shutdown. Have you tried putting the gas pedal to the floor and holding it when restarting?
  21. proartguy
    Joined: Apr 13, 2009
    Posts: 452

    from Sparks, NV

    I would suggest lowering the float a little. I had hot start problems with my Carter BBD. Lowering the float helped the hot start, but made it not start as well cold - worth the tradeoff.

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