sudden acceleration and burst of power
#1
sudden acceleration and burst of power
I have a 1978 f150 with a 6.9 idi and randomly my truck will get a burst of power and accelerate on its own for a second. I just replaced injection lines and caps becuase they were leaking causing hard start. Am i sucking air? Could it be injectors, ip. I also just changed fuel filter. I dont know what it is im stumped also it doesnt matter what fuel level its at so i know its not rhe pick up lines cause know what the idis do when almost out of diesel. Please help
#2
Sounds like air in the line, check your lines running to the lift pump. My 86 had a leak on the short hose between the frame mounted hard line and the lift pump. It wasn't until it got bad enough to drip that we actually noticed it. The truck had been surging for a long time and replacing that hose cured it.
#3
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#6
That's how my truck acts when I get low on fuel. The pickup in my front tank is broken and starts sucking air about 1/4 tank and will surge and sputter and lope. If you can do that with a full tank then that's probably not your issue. It still sounds like you are getting air in somewhere. What does your fuel system look like, is it all the original gas stuff from the F-150 up until the lift pump on the motor?