Bored&Stroked
Well-known member
You definitely need to figure out if it is a fuel or spark issue . . . then go from there.
Magneto: Just like checking with any other ignition . . . pull a wire from a plug and hold it a 1/4" away and crank it over - or just put a timing light on it. I run mags as often as possible - it is rare that they are intermittent . . . unless there is something funny going on with the ground/kill switch wiring or the switch itself. Or just put your tongue on the end of it and have your wife crank it over - you'll be screaming and she'll be laughing!
What type of mag? If it is an older mag like a Harman Collins, then it could have a bad coil in it. When the coil is weak, it will tend to quit once the ignition heats up. Once it cools down - works just fine again. If this is the case, then have Tom Cerello rebuild it and put a new coil in it.
What does it feel like when it quits? Like it is starving for fuel - and running out? If you take the air cleaners off and work the throttles (after it quits) - do you see any fuel coming out of the accell pump squirters?
Fuel Pumps: I tend to run the ones that have glass bowls on them - so I can see when they are pumping fuel (easily). One issue with the new/modern ones is that they usually have way too much pressure for Strombergs - so a pressure regulator is needed. Does your car currently have a pressure regulator on it? If so, maybe it is just set too low?
When it quits, pull the fuel line to the carbs - put the kill switch 'On' and see if you're getting good squirts of fuel when you just crank it over. I'd take a little can to capture the fuel in - and have a good fire extinguisher with yah! You need to determine if the pump is working . . . as it should at crank speed.
Feel free to ping me if you need more help.
B&S
Magneto: Just like checking with any other ignition . . . pull a wire from a plug and hold it a 1/4" away and crank it over - or just put a timing light on it. I run mags as often as possible - it is rare that they are intermittent . . . unless there is something funny going on with the ground/kill switch wiring or the switch itself. Or just put your tongue on the end of it and have your wife crank it over - you'll be screaming and she'll be laughing!
What type of mag? If it is an older mag like a Harman Collins, then it could have a bad coil in it. When the coil is weak, it will tend to quit once the ignition heats up. Once it cools down - works just fine again. If this is the case, then have Tom Cerello rebuild it and put a new coil in it.
What does it feel like when it quits? Like it is starving for fuel - and running out? If you take the air cleaners off and work the throttles (after it quits) - do you see any fuel coming out of the accell pump squirters?
Fuel Pumps: I tend to run the ones that have glass bowls on them - so I can see when they are pumping fuel (easily). One issue with the new/modern ones is that they usually have way too much pressure for Strombergs - so a pressure regulator is needed. Does your car currently have a pressure regulator on it? If so, maybe it is just set too low?
When it quits, pull the fuel line to the carbs - put the kill switch 'On' and see if you're getting good squirts of fuel when you just crank it over. I'd take a little can to capture the fuel in - and have a good fire extinguisher with yah! You need to determine if the pump is working . . . as it should at crank speed.
Feel free to ping me if you need more help.
B&S
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