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| | | | Joined: Sep 2023 Posts: 23 'Bolter | | 'Bolter Joined: Sep 2023 Posts: 23 | Hi all
I have a 216 stove bolt engine in a 1952 style side utility in Australia.
When I bought it it had an electric fuel pump fitted before the eom mechanical fuel pump.
It also had a Pressure Regular valve on the suction side of the electric pump.
Ie, pressure regular valve, elect pump, Oem mechanical fuel pump.
It all worked ok then it started to surge when you put the foot down and on occasion stopped.
I have removed the pressure regulation valve and the electric pump and left it as original with just the mechanical fuel pump.
Starts, idles fine and runs up to around 35mph then starts the jerking / surging thing like it’s starving for fuel. Gets worse as it warms up.
Been told to completely remove/ strip/ clean the carby. Also been told to replace the condenser first.
Appreciate any advice before I move forward.
Cheers
Max | | | | | Joined: Feb 2016 Posts: 1,989 'Bolter | | 'Bolter Joined: Feb 2016 Posts: 1,989 | Surging is typically associated with too little fuel, I would confirm the ignition system is 100%, then work on the fuel system. Make sure the fuel lines are clear and tight and not sucking air into the system, check pressure AND volume of the pump, then work on the carburetor.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
| | | | | Joined: Sep 2009 Posts: 5,868 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,868 | Max - just a note that this topic best falls into the Engine Shop forum, so your conversation has been moved there.  More replies and conversation coming! 
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
| | | | | Joined: Dec 2020 Posts: 1,961 'Bolter | | 'Bolter Joined: Dec 2020 Posts: 1,961 | Most likely fuel pump volume and pressure if its running fine till 35mph
~ BD.
"You won't find me in an old folks home" Pioneer Florida Cracker
1958 Apache Stepside
1958 Apache 1/2 ton Panel
1959 Apache 1/2 ton Panel
| | | | | Joined: Jan 2022 Posts: 2,452 'Bolter | | 'Bolter Joined: Jan 2022 Posts: 2,452 | I'd GUESS insufficient fuel pressure too. But instead of guessing, I'd do as Jerry says and actually measure it. This will require a pressure gauge. A combination vacuum and fuel pressure gauge is your best bet and can be had for under $20 at Harbor Freight and may be available for loan out at your FLAPS. You may need a longer hose to reach into the cab so you can measure while it is failing. Check your Chevy Maintenance Manual for proper readings.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| | | | | Joined: Dec 2020 Posts: 1,961 'Bolter | | 'Bolter Joined: Dec 2020 Posts: 1,961 | Thats probably why the electric was installed. If it was fine, check the screen on the carb at fuel line.
Check volume with the fuel line off at carb with a cup.
~ BD.
"You won't find me in an old folks home" Pioneer Florida Cracker
1958 Apache Stepside
1958 Apache 1/2 ton Panel
1959 Apache 1/2 ton Panel
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Check the fuel lines. Often someone has installed an extra fuel filter in the line that could be plugged up. That model is equipped with a shutoff valve under the tank. It has been known to get plugged up.
If the fuel system is ok take a look at the ign. points. the spring can be weak or sticking in the pivot.
George
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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