Re: Galloping Pony Stumbles
"Dave Wick" <firstname.lastname@example.org> wrote in message
>I have an '89 5.0 5-speed Mustang GT. Before I go further, I did have a
>similar post out here a while back. Please stay with me though. During
>full throttle acceleration in first gear it starts stumbling well before
>red line ... by 3,500 or 4,000. It's like it runs out of gas. Yet it's
>fine at part throttle (just did this today) right up to 5,000ish with no
>problem. It's fine in second gear at full throttle all the way up to 5,000
>and beyond. It only stumbles at full throttle in first gear.
> The fuel filter and fuel pump have been replaced. I've checked for codes.
> I've checked the TPS. I have no clues. It runs perfect except at full
> throttle in first.
> Ideas anyone?
This idea is based on the assumption that the engine will "cock" 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.