GT5OH wrote:
> Hey guys,
>
> I am getting a weird stumble from my 1990 GT when I mash down the
> pedal at WOT. It feels like all of a sudden I am running out of gas
> or just loosing power. I have checked all the vacuum lines and I am
> not sure what else could be causing this. Here are the modifications
> I have done recently which one of has to have caused this:
>
> Cobra upper and lower intake manifold (w/spacer)
> Shorty headers
> Radiator
> Water pump
> Fan w/clutch and shroud
> cap and rotor
> wires
> alternator (upgrade to 130A)
> Ram air hood
>
> If anyone has any idea what could be causing this I would appreciate
> this, it's not fun when your mustang won't get up and go when you want
> it to. Thanks for the help guys.
>
> Sean

I'd check your fuel pressure. I believe it should be somewhere around
45 psi. Might want to check your manual on that one. Replace your fuel
filter, if you haven't lately. Also, Check resistance in your spark
plug wires.