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jazzmaster, ASE Certified Tech
Category: Toyota
Satisfied Customers: 2951
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Ford, 1965 f100, 300, installed jasper engine, ran great

Customer Question

ford, 1965 f100, 300, installed jasper engine, ran great for 3 months, now it wont even idle, changed fuel pump 2x , carb 2x, rechecked timing, plugs are fouled, it will turn over, try to catch but not run, compression is 155 in each cylinder, took off valver cover and all rocker arms traveling same distance up and down. stumped
Submitted: 1 year ago.
Category: Toyota
Expert:  jazzmaster replied 1 year ago.

hi, usually rich plugs are a sign of a carb issue compounded with the symptom of not wanting to idle ..

Can you get it to sort of idle enough (even if you have to hold your foot on the gas pedal or move the throttle open a little and look inside the carb to see if you can see fuel dribbling or spraying heavy in side the carb from the jet(s) ?

does the choke work (if an automatic choke ) or does this have a manual choke ?....jazzmaster ....

Customer: replied 1 year ago.
cant make it idle, just barley, and if yougive it any gas it dies, so i put the original carb on and a diff fuel pump same issue even if i ru it out of fuel, theres no clean up as it leans out. so i started thing, maybe ignition, but its a new distributor, and its points, so i figure no brainer. have tried different fuel, restricted the fuel, to no fuel at all, it coughs and sputters, then if you hit the gas at all it dies instantly
Expert:  jazzmaster replied 1 year ago.
have you check the fuel line from the tank to the fuel pump ?
you can also use a hand held vacuum pump.
pinch off the fuel hose at the tank and remove the fuel hose/line from the fuel pump.
and see if it holds vacuum by inserting the fitting from the vacuum pump into the hose end at the fuel pump.
also, this comes to mind -as it does happen that the pick up tube on the sending unit is rotted or has a hole in it ...jazzmaster ..
Customer: replied 1 year ago.
it has no fuel restriction, i am an a.s.e. certified shop owner, lol and am being stumped by a 65 ford 300 engine
Expert:  jazzmaster replied 1 year ago.
its pumping fuel into the carb ?
Expert:  jazzmaster replied 1 year ago.

hello, do you still need help ?

Expert:  jazzmaster replied 1 year ago.

hi, If I helped you please rate me positive ,as this is the only way I get credit and we can continue on if needed .thank you

...jazzmaster ...