89 mustang hesitation

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toytrd89 - 24 Jul 2005 00:02 GMT

I have a 89 GT with a 93 cobra motor which was recently rebuilt to a 308
with forged internals. The heads were redone with 202 in. and 195 ex. It
has a 70mm throttle body and egr spacer, gt 40 intake, 24lb injectors, nos
fogger system"not used at the moment", msd billet dist, 6AL, and HVC
blaster coil. When I am at a cruising speed and the engine RPM's are about
2200 it sounds like its missing, but everything in the Ignition system is
new, and I have around 42lbs of fuel pressure. Whats up? Does anybody have
some insight.

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Rod - 24 Jul 2005 22:20 GMT

Could be the start of your fuel pump going bad. If it happens at low fuel
levels then that would also point to the pump.

Cheers, Rod

> I have a 89 GT with a 93 cobra motor which was recently rebuilt to a 308
> with forged internals. The heads were redone with 202 in. and 195 ex. It
[quoted text clipped - 4 lines]
> new, and I have around 42lbs of fuel pressure. Whats up? Does anybody have
> some insight.

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toytrd89 - 27 Jul 2005 01:06 GMT

My car has two fuel pumps, one in take and a Vortec T-Rex pusher pump for
the nitro. Both new, Thanks for trying to help!

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Backyard Mechanic - 25 Jul 2005 01:56 GMT

> I have a 89 GT with a 93 cobra motor which was recently rebuilt to a
> 308 with forged internals. The heads were redone with 202 in. and 195
[quoted text clipped - 4 lines]
> in the Ignition system is new, and I have around 42lbs of fuel
> pressure. Whats up? Does anybody have some insight.

What Spark Plugs? Why am I thinking Bosch double plats!

Buy the same exact plugs that came with the 93 Cobra new....

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toytrd89 - 27 Jul 2005 01:04 GMT

The plugs are Denso uridum "no Bosch in my car".

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