94 red gt

I have a 94 gt. when cruzin down the road the car will start sputtering the rpm gauge will go from 2300 down to 400. It downs not do it everyday, I can sometimes go for a few days with out any problems. I put a new fuel filter,plugs,wires,ignition coil,distributor and checked fuel pressure reading, fuel pressure was within spec. any help would be appreciated thanks.

rleey07

I had a 94 gt that did the same thing, it ended up being the fuel pump. I replaced almost everything sensor wise and plugs and wires, and it was just the pump. I replaced the pump and it ran great after that.

Bubba 95SN

To verify fuel delivery have gauge hooked up while griving when it messes up. EEC1V tests are necessary. Post results. What brand spark plugs?

94 red gt

when i was driving with the gauge hooked up and it sputtered the fuel pressure only dropped a couple of pounds it didn't fluctuate much. they are platinum 2 plugs not sure what the name brand of the plugs are.

Bubba 95SN

Take out thr platinum plugs replace with motorcraft or Autolite copper plugs. If the offending plugs were Bosh you have solved problem,

94 red gt

thanks for the help i will give it a try and see what happens

motorking

Hey 94GT,
I am the tech manager at Autolite spark plugs and a avid Mustang fan. While I do agree that dual electrode spark plugs really do not work very well in Mustangs, I do not think that is causing your issues. Have you checked all wiring connectors in the engine compartment? Check every ground cable to make sure they are clean and tight. Check the alternator output with every single electrical accessory in the car on. I just had a Camaro in my shop with similar symtoms, the owner had replaced many sensors prior to bringing it to me. I noticed the battery was low, charged it up and it ran great-for a little while. Some checking found the power wire at the alternator had corroded and was intermittantly charging the battery. Let us know what you find out and if you need specific troubleshooting intructions, shoot me an email at Jay.Buckley@Honeywell.com

94 red gt

thanks motorking I will take a look one day after work or this weekend and let u know thank you for the help.