Galloping Pony Stumbles

Fuel pressure regulator?

Shot-in-the-dark mode;

You say that you replaced the fuel pump. It sounds like you might have fuel starvation under heavy acceleration. First gear should pull more acceleration G's than second. maybe fuel is running away from the pickup? Try it with a full tank of gas. (?)

Dave Wick wrote:

" snipped-for-privacy@here.com" wrote in news: snipped-for-privacy@here.com:

Also maybe coil... though MOST times that symptom is very marked and exhibits in all gears.

SITD #2

This idea is based on the assumption that the engine will "c*ck" to one side more in first than any other gear. I don't really know if this is true. It's a guess. If it does, a bad spark plug wire is grounding out against something when the engine is "torqued" to the max, but not when under partial torque (less than full throttle in first or full throttle in any other gear). A new set of wires may solve the problem.

Comments on my assumption may help Dave out.

Interesting thought. I'd like to think that a careful inspection of the wires should show any issue. I'll have to take a good look.

Dave

Its been quite awhile, but isnt there a metal baffle of sorts that floats inside the gas tank? I seem to recall that the fuel pump pickup fits inside/between the baffles somehow. I also seem to recall that I read that if the pump pickup wasnt installed correctly in the baffles fuel starvationc ould happen. (?)

Like I said, its been a long time since I did a 5.0 fuel pump, so I might be confused.

Pop the hood with the engine running in a dark place. You may see some arcing.