[C1] Engine trouble
Thread Starter
2nd Gear
Joined: Mar 2014
Posts: 2
Likes: 0
From: Albrightsville Pennsylvania
Engine trouble
60 Corvette up from Florida Not run in a while found the gas tank rusted replaced the tank the lines filter got it running have no throttle response hit the throttle it dies replaced the ballast resistor and coil still have the same problem. When it sits for a long time then when started it will run for 30 to 45 seconds the slowly dies out.
Any thoughts on what to try next ?
Thank you
Any thoughts on what to try next ?
Thank you
Race Director
Joined: Oct 2005
Posts: 12,470
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Check fuel flow rate and fuel pressure at the fuel line inlet to the carb, while cranking the motor, you should ahve about 5 PSIG pressure, and strong pulse flow. If not, your pump is probably bad, or clogged with rust from the tank..
Doug
Doug
Race Director
Joined: Feb 2007
Posts: 15,491
Likes: 8,963
From: northern california
C2 of Year Finalist (track prepared) 2019
60 Corvette up from Florida Not run in a while found the gas tank rusted replaced the tank the lines filter got it running have no throttle response hit the throttle it dies replaced the ballast resistor and coil still have the same problem. When it sits for a long time then when started it will run for 30 to 45 seconds the slowly dies out.
Any thoughts on what to try next ?
Thank you
Any thoughts on what to try next ?
Thank you
Nothing you have described suggests an ignition problem. Focus on fuel delivery.
Racer
Joined: Dec 2008
Posts: 424
Likes: 247
From: cumberland md
had a similar problem with a c-2 FI vet.turns out the chines fuel sending unit pickup tube was incorrectly bent such that the sock was about 1/4 tank of gas in the vet. take a horoscope and see if the tube and sock are above the level of gas in your tank. mike mccagh
Le Mans Master
Joined: Nov 2015
Posts: 7,495
Likes: 2,653
From: Really Central IL Illinois
Check all rubber hoses from the tank and to the fuel pump. A cracked hose will gravity fill with fuel but it suck air when the pump is drawing a vacuum. Thus, you get fuel to run for a few seconds or minutes before you get air.
Jim has a very good point with the leather accelerator pump.
Jim has a very good point with the leather accelerator pump.
Le Mans Master
Joined: Nov 2015
Posts: 7,495
Likes: 2,653
From: Really Central IL Illinois
Put a fuel pressure gauge in the line with a Tee to verify it is a fuel delivery problem. If you can't tee in a gauge, verify the loss of fuel by observing the accelerator pump shot after it dies. Or you can also choke it with a rag or the choke blade as it is dying to see if it will pick up again.
Last edited by R66; May 23, 2021 at 09:23 PM.
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Le Mans Master
Joined: Feb 2004
Posts: 7,370
Likes: 875
From: Norcal CA
2018 C1 of Year Finalist
Put a fuel pressure gauge in the line with a Tee to verify it is a fuel delivery problem. If you can't tee in a gauge, verify the loss of fuel by observing the accelerator pump shot after it dies. Or you can also choke it with a rag or the choke blade as it is dying to see if it will pick up again.
Yep! also, I would not rule out the diaphragm on the fuel pump if it sat with gas. I had one eat away from sitting. It left me on the side of the road.
Le Mans Master
Joined: Sep 2008
Posts: 5,662
Likes: 2,344
From: Lake Minnetonka, Mn
2018 C1 of Year Finalist
Oxygenated fuel probably ate up the accel pump that Jim Lockwood was referring to. As someone said, rust didn't stop at the tank. You need to go stem to stern with the fuel delivery system.