91 5.0 HO won't start - Ford Forums

diiulio · 07-21-2008, 10:32

I have a '91 Mustang GT with a 5.0HO and it won't start. It has been sitting for a couple of years, but getting started occasionally. I went to go start it and it turns over, but does not start. I took a spark plug cable off and I get a spark. I pressed the valve of the fuel supply line and it sprays out, plus I hear the pump whine when I turn on the 'on' so I know it is pumping.

I thought maybe it was the coil so I replaced it, but still the same thing.

Any ideas? How should I diagnose this?

Jason

thefonz · 07-21-2008, 12:31

Check fuel pressure at the fuel rail. You need about 35 psi to start and run the vehicle. You could spray some starting fluid directly into the throttle body. If it starts, you are lacking fuel.