[paddd]

I have a 1989 ford mustang lx with a 2.3 litre engine, the other day on the highway it began to seem to miss and while missing the tach would bounce up and down, it cleared up farther down the road so I forgot about it. the next morning I started the car and proceeded down the street where it quit. once I got it home I checked the spark it's good, I checked the fuel relay it's good, I checked the inertia switch it's good, could it be the fuel pump? it will start but runs up to about 1000 rpm then sputters and dies, I can hear the fuel pump but it definately does sound different than in the past. any ideas before I put in a new fuel pump?
thanks

[ExtrmZ]

check the spark with a timing light, see if its steady when it does this problem. sounds like an ignition problem

[paddd]

spark is good timing is good

[MilkMaster122]

have you took a timing light to the actual engine? because even if there is physical spark there, that means nothing without the timing its firing at. Which is your ignition control mod.

There is a wire that goes to your ignition control modual called the IDM wire. this wire is what is directly hooked up to your tach and gives you your reading from the ignition control modual. if this mod is bad. it will cause that.

also get your voltage reg checked.

[SNavarro]

Ignition switch maybe?

[LederHosen]

The thing about sputtering and dying, it could be so many things. I would check some easy stuff, like pull all the plugs and wires, and make sure their all good, and make sure there is a solid connection from each wire to the distributor. I've had this problem before and once it was a bad spark plug wire, and another one of the wires wasn't connected well enough to the distributor. I would say change the fuel filter too, but generally you want to change the pump and filter together. But you can change the filter first to see if that was the problem.

Zac

[TOM RENZO]

Sounds like the fuel pump delivery hose in the tank SPLIT. What happens is the hose is exposed to the fuel on both sides. (inside and outside) the early efi hose used in the fuel tanks could not take the chemicals and caused the hose to split. A quick preasure reading at the schraider valve will tell the story. Preasure won't hold and it will be very low. I would pull the tank and install a 255 walburo pump and screen assembly. Good luck tom.