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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2019 Posts: 232 'Bolter | | 'Bolter Joined: May 2019 Posts: 232 | Have a 54 power glide engine
Plugs in it are R43
Calls for ac 46-5
Reason for my question is it diesels when shut off
Compression 135-150
Plug gap was too wide
I re-gapped but thought I’d aak about the r43 plugs before I reinstall
Can’t find a heat chart on line
Thanks | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | What technique do you use to set your ignition timing? | | | | | Joined: Mar 2010 Posts: 10,272 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,272 | Deiseling after shut down is often caused by a too rich condition caused by a malfunctioning carburetor.
Power piston hanging up, or accelerator pump leak depending on what carb you have.
Last edited by 52Carl; 04/16/2023 7:21 PM.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Oct 2021 Posts: 6,743 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 6,743 | Make sure your timing isn't too far advanced.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
| | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | Dieseling during shutdown is caused by an idle speed that's too high. Adjust the carburetor correctly and the problem will go away. Mixture and/or ignition timing has very little to do with the problem. If it won't idle somewhere around 500 RPM, fix the carburetor or find the vacuum leak.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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Love your enemies and drive 'em nuts!
| | | | | Joined: May 2019 Posts: 232 'Bolter | | 'Bolter Joined: May 2019 Posts: 232 | I think you guys are on the right track
Since I posted I’ve found
Vacuum advance won’t hold vacuum which would be lean BUT the carb is a mess I think
Leaks
Oozes gas from everywhere after shut off and accelerator pump quit working
I rebuilt but I think I’m losing my touch if I ever had one
Never checked timing as I thought it ran fine until I started driving more
Carter W1 carb
1112353 9G12 distributor
Any leads on reputable carb and distributor rebuilders and or sources for parts
Distributor also has a bit of side to side play
Mikes carb supplied the carb kit | | | | | Joined: May 2019 Posts: 232 'Bolter | | 'Bolter Joined: May 2019 Posts: 232 | | | | | | Joined: Feb 2019 Posts: 4,473 AD Addict & Tinkerer | | AD Addict & Tinkerer Joined: Feb 2019 Posts: 4,473 | One of our own, “carbking” owns “The Carburetor Shop”. He has the carb kit you need or contact him and he may be able to rebuild it for you. Here is a link to his website. http://www.thecarburetorshop.com/
Last edited by Phak1; 04/17/2023 12:31 AM.
Phil Moderator, The Engine Shop, Interiors and Project Journals1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc BrakesProject JournalsStovebolt Gallery Forum | | | | | Joined: May 2019 Posts: 232 'Bolter | | 'Bolter Joined: May 2019 Posts: 232 | | | |
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