r/Triumph_Cars • u/diabetessucksnuts • 1d ago
Trouble shooting
I have a 1976 spitfire 1500, I’ve gotten it to the point where I can start it consistently with some manipulation of the choke. After idling for a bit the motor will sputter out regardless of how many different choke positions I try.
The only thing that prevents it from sputtering out is if I keep my foot on the gas pedal. I can rev the car at will as long as I never completely let off the gas. I’ve had it idling for minutes at a time while maintaining 1500/2000 rpm’s. If I hold the rpm’s and let off the pedal, the motor will start to sputter, but upon pressing and holding the gas pedal the motor will stabilize and be fine.
I’ve replaced the spark plugs, coil, battery, air filter and ensured fuel is getting past the fuel pump into the carb.
I’ve not messed with or cleaned the carb.
