My 1995 12 valve runs perfect until it warms up that takes about 5 miles in our 50 degree weather. It then makes and intermitant loud clicking noise and loses speed until it stops clicking and then the truck takes off again. At highway speeds it will come back to life before I am going too slow. Around town when clicking it won't idle and requires that the pedal be smashed to the floor and a fair amount of cranking to fire up. During these times the trottle also tends to stick somewhat. I have replaced the lift pump and the pressure valve on the return. I have replaced fuel hoses and filter. I have dropped the tank and inspected the fuel pickup and screens. I am stumped as to the problem and fear that it is the fuel injection pump itself. Are these symptoms of a failing injectior pump, in light of everything else I have done.

Thanks,

Steve

 

See "98 12valve dying" above. Same problem.