FYI FORD - MustangSteve's Ford Mustang Forum
The Internet's Most Knowledgeable Classic Mustang Information
IF YOU HAVE A QUESTION ABOUT CLASSIC FORD MUSTANGS, YOU HAVE COME TO THE RIGHT PLACE!
MustangSteve has over 30 years of Mustang experience, having owned 30 of them and restored several others. With the help of other Mustangers, this site is dedicated to helping anyone wanting to restore or modify their Mustang.... THERE ARE NO DUMB QUESTIONS!!!!!
Visit MustangSteve's web site to view some of my work and find details for:
FYIFORD Contributors' PICTURES - Power Brake Retrofit Kits for 65-66 Stangs - Classic Mustang FAQ's by MustangSteve - How to wire in a Duraspark Ignition - Mustang Ride Height Pictures and Descriptions - Steel Bushings to fit Granada Spindles to Mustang Tie Rods - Visit my EBAY store MustangSteve Performance - How to Install Granada Disc Brakes MustangSteve's Disc Brake Swap Page - FYIFORD Acronyms for guide to all the acronyms used on this page - FYIFORD Important information and upcoming events

You are not logged in. Would you like to login or register?

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Hot start issue

    • 1 of 1

       

    9/09/2024 8:07 AM  #1

    Steve69
    Senior 24-7 FYI Addict

    Offline

    From: Madison Wisconsin
    Registered: 4/01/2013
    Posts: 2,727

    Hot start issue

    Hey Guys,

    I have a Summit Racing carburetor.  It runs good.  After Its warm and I shut it down for more that 5 minutes it has a hard time starting. Like theres no fuel.  If its only a couple of minutes it fires up like it should.  I have the fuel lines wrapped in heat covering.  I bought a old style foxbody fuel pump with a return style line back to the fuel tank. 

    After I ran it let it sit for 10 minutes.  I figured I check the fuel bowls on the carburetor while engine is off.  The rear bowl was 3/4 full.  The front was less than half.  I did notice the fuel moving around the bowl and the car was still.  I wonder if its boiling and maybe causing the issue of warm start problems.   Im debating on installing a Holley heat shield and see if this fixs the issue.  Anyone else have any issues like this with there carburetor.  

    Thanks
    Steve69

     

    9/09/2024 8:32 AM  #2

    pbrownrk
    FYI FORD Member

    Offline

    From: Coos Bay, Oregon
    Registered: 4/01/2013
    Posts: 78

    Re: Hot start issue

    I have a Summit carb on my 1966 Ranchero with a stock 302. I can go to the market and shop. When I go to leave it does not want to start. Running and engine off the bowls are at 1/2 full. This has been a persistent problem. I carry a jump pack because it will run the battery down trying to start the car.
     

     

    9/09/2024 9:46 AM  #3

    rpm
    Senior 24-7 FYI Addict

    Offline

    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,587

    Re: Hot start issue

    Make sure your carburetor has a spacer between the intake manifold which keeps the carb cooler.

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    9/09/2024 9:59 AM  #4

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,156

    Re: Hot start issue

    I installed a 500 cfm Summit carb on Jose’s 65 with a rebuilt 5.0.  It does not exhibit any starting issues. Always starts at the touch of the key, cold or hot.

    Maybe you need to adjust float levels or install a new needle/seat assembly.

    I have never believed in all the bandaid solutions you guys are discussing.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/09/2024 10:20 AM  #5

    Bentworker
    I FYI 24-7

    Offline

    Registered: 9/17/2017
    Posts: 463

    Re: Hot start issue

    Steve- Not everyone has the luxury of pure Texas gasoline.  Out west we are burning whatever blend of garbage is sold at the pump.  I wouldn't label a phenolic spacer as a band aid.

     

    9/10/2024 7:21 AM  #6

    Steve69
    Senior 24-7 FYI Addict

    Offline

    From: Madison Wisconsin
    Registered: 4/01/2013
    Posts: 2,727

    Re: Hot start issue

    pbrownrk wrote:

    I have a Summit carb on my 1966 Ranchero with a stock 302. I can go to the market and shop. When I go to leave it does not want to start. Running and engine off the bowls are at 1/2 full. This has been a persistent problem. I carry a jump pack because it will run the battery down trying to start the car.
     

       That sounds like a PIA..   Mine will start if I pump it a bit or hold the pedal to the floor while cranking.  I ordered the heat plate from Summit and I might add a spacer too.  It that doesn't work maybe try what MS suggested with the needle and seat and adjusting the fuel levels.  I always run Kwik Trip premium fuel with not Ethanol.  Works great in anything that has a carburetor. 
     

       •Thread Starter
     

    9/10/2024 7:30 AM  #7

    BobE
    Senior 24-7 FYI Addict

    Offline

    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,558

    Re: Hot start issue

    Steve69 - if you install a spacer, I would avoid an aluminum version.  While aluminum will dissipate heat quickly, it will still transfer heat to the carb.  The phenolic/wood versions will insulate the carb better. 
     

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    9/10/2024 9:43 AM  #8

    Rufus68
    I FYI 24-7

    Offline

    From: Knoxville, TN
    Registered: 4/26/2017
    Posts: 865

    Re: Hot start issue

    What procedure do you use when attempting to start it hot?

    1968 T-code Coupe with a 302.  Nice car, no show stopper for sure, but I like it.
     

    9/10/2024 11:47 AM  #9

    TKOPerformance
    Hyper FYIFORD ADDICT

    Offline

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,418

    Re: Hot start issue

    I've often heard the fuel blamed for hot start issues, because most fuel has ethanol in it now.  I don't know that ethanol fuel would make a difference since the boiling point of ethanol is actually higher than gasoline. 

    When these cars were new they typically had a cast iron manifold with a carb atop an aluminum spacer.  That seemed to work fine and not create hot starting issues.  So IMO if there's an issue its not related to such a combination, and an aluminum manifold would be even less likely to cause issues. 

    If the float bowl is 1/2, 3/4, or full I don't see that being an issue in it starting.  Its got gas.  So unless you run the bowls dry cranking it and they can't refill not sure why it would matter.  If they don't refill I'd suspect the needle and seat, which I have seen ethanol damage and cause issues. 
     

     

    9/10/2024 2:15 PM  #10

    Ron68
    Senior 24-7 FYI Addict

    Offline

    From: Mukilteo, Washington
    Registered: 4/01/2013
    Posts: 1,540

    Re: Hot start issue

    I had a hot start issue once with the 68, which had an aluminum spacer under the carb. On hot summer days where I had been driving a long ways on the freeway, when I'd pull off, it might stall and be hard to start.  I switched to a nylon spacer and it was no longer an issue.

    68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     

    9/10/2024 4:35 PM  #11

    rpm
    Senior 24-7 FYI Addict

    Offline

    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,587

    Re: Hot start issue

    I'm using this 3/8" hear soak gasket.

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    9/10/2024 4:57 PM  #12

    Rufus68
    I FYI 24-7

    Offline

    From: Knoxville, TN
    Registered: 4/26/2017
    Posts: 865

    Re: Hot start issue

    Are you depressing the pedal half way and holding it while starting the car hot?  This is the procedure outlined in the owner's manual back in the day.  This works by allowing more air into the mix during starting.
    Do not release the pedal nor pump it.  The intention is for more air not more fuel.
     

    1968 T-code Coupe with a 302.  Nice car, no show stopper for sure, but I like it.
     

    9/10/2024 5:04 PM  #13

    Rufus68
    I FYI 24-7

    Offline

    From: Knoxville, TN
    Registered: 4/26/2017
    Posts: 865

    Re: Hot start issue

    1968 T-code Coupe with a 302.  Nice car, no show stopper for sure, but I like it.
     

    9/10/2024 5:43 PM  #14

    6sally6
    Hyper FYIFORD ADDICT

    Offline

    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,739

    Re: Hot start issue

    Rufus68 wrote:

    I find it 'funny' the instructions show a female pressing the accelerator....(or a California man...
    calm-down...J/K)) Although those are nice pumps !!!!!
    6sal6
     

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    9/10/2024 5:54 PM  #15

    Rufus68
    I FYI 24-7

    Offline

    From: Knoxville, TN
    Registered: 4/26/2017
    Posts: 865

    Re: Hot start issue

    And they wonder why the Mustang was originally called a secretary's car

    1968 T-code Coupe with a 302.  Nice car, no show stopper for sure, but I like it.
     

    9/10/2024 6:28 PM  #16

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,156

    Re: Hot start issue

    I think the assumption was that only a woman would need instructions on how to start a car

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/11/2024 4:06 AM  #17

    Rufus68
    I FYI 24-7

    Offline

    From: Knoxville, TN
    Registered: 4/26/2017
    Posts: 865

    Re: Hot start issue

    Better

    1968 T-code Coupe with a 302.  Nice car, no show stopper for sure, but I like it.
     

    9/11/2024 6:07 AM  #18

    TKOPerformance
    Hyper FYIFORD ADDICT

    Offline

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,418

    Re: Hot start issue

    You don't know how that foot identifies. 

     

     

    1 of 1

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  »  Hot start issue

    • Board footera


    REMEMBER!!! When posting a question about your Mustang or other Ford on this forum, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.