Fuel starvation- any ideas
Posted: Tue Oct 17, 2017 12:49 pm
Hi
Had a problem bring my 'new' convertible home in July, ran for twenty mile and then my wife and I towed the car the next 60 miles home.
Inspection indicated the fuel line was full of kinks, new fuel line fitted.
Inspection indicated the fuel pump wasn't right so exchanged for a known good one.
Inspection indicated the small tube to the carb jet was kinked, carb overhauled with new jet and needle and float level re-set.
Inspection indicated the tank was rusty inside, scoured out the tank, 'shaping' several small wired brushes to facilitate the job and pressure washed interior as best I could, ran petrol through and eventually when swilled around with petrol clean petrol went in and clean petrol came out.
Re-assembled tank to car.
This week the car went back on the road, and has now covered about 112 mile without a problem but yesterday it stalled with fuel starvation, fortunately a friendly driver stopped and help me push it the shortish distance home...(lucky I know).
Investigation started; disconnected the flexible line to the carb, turned on the ignition, no action from pump.
Broke the fuel line union to pump and the pump immediately starts to pump...admittedly air...but pumps...turned off the ignition.
Concluded, the line being new, that the tank filter must be blocked.
Tightened the union and, to prove I was right turned on the ignition, the pump unexpectedly fires up fills the carb and the car starts.
Leave the car running.....it runs but eventually stops again. The engine is by now hot. (by the way I think the thermostat is permanently open). If I tap the pump, it tries a pump or two but can't /won't keep running to fill the float chamber. I tap the float chamber thinking the needle might be sticking, no effect. (I had checked this when the carb was overhauled but you never know).
The pump is hot, the ignition coil is hotter, the fuel line to the pump is cool.
Where do I go now??? Anyone got any ideas...I'm stumped.
Had a problem bring my 'new' convertible home in July, ran for twenty mile and then my wife and I towed the car the next 60 miles home.
Inspection indicated the fuel line was full of kinks, new fuel line fitted.
Inspection indicated the fuel pump wasn't right so exchanged for a known good one.
Inspection indicated the small tube to the carb jet was kinked, carb overhauled with new jet and needle and float level re-set.
Inspection indicated the tank was rusty inside, scoured out the tank, 'shaping' several small wired brushes to facilitate the job and pressure washed interior as best I could, ran petrol through and eventually when swilled around with petrol clean petrol went in and clean petrol came out.
Re-assembled tank to car.
This week the car went back on the road, and has now covered about 112 mile without a problem but yesterday it stalled with fuel starvation, fortunately a friendly driver stopped and help me push it the shortish distance home...(lucky I know).
Investigation started; disconnected the flexible line to the carb, turned on the ignition, no action from pump.
Broke the fuel line union to pump and the pump immediately starts to pump...admittedly air...but pumps...turned off the ignition.
Concluded, the line being new, that the tank filter must be blocked.
Tightened the union and, to prove I was right turned on the ignition, the pump unexpectedly fires up fills the carb and the car starts.
Leave the car running.....it runs but eventually stops again. The engine is by now hot. (by the way I think the thermostat is permanently open). If I tap the pump, it tries a pump or two but can't /won't keep running to fill the float chamber. I tap the float chamber thinking the needle might be sticking, no effect. (I had checked this when the carb was overhauled but you never know).
The pump is hot, the ignition coil is hotter, the fuel line to the pump is cool.
Where do I go now??? Anyone got any ideas...I'm stumped.