Help! Mustang wont start!

[MustangLover71]

Thanks for the response. OK, here is a little more for you to go on....

We had already checked the fuel switch in the trunk today, that didnt seem to be the issue.

Yes, when the key is in the on position, you do hear the fuel pump. We also had plenty of gas in the tank.

The car sure acts like it wants to start, just cant get it going It just wont kick over! Another weird thing was this happened after the car had been driving fine. It was so sudden. Hadn't been riding rough at all. Had drove it for about 10 minutes, parked, 5 min later got back in, started it without problem, drove another 5 minutes, parked it, 5 minutes later tried to start it, wouldnt kick in, and here we are.

We are pretty sure that we have narrowed this down to a fuel delivery problem, since we replaced the coil and modulator, and the spark is good. We know that when that starter fluid was sprayed into the intake that it fired up, very briefly, of course. So to us that says fuel delivery for sure.

The Fuel pump was replaced less than a year ago, and since we hear that engaging we are wondering if the problem lies with the regulator. We did find out that the regulator wasn't replaced or upgraded when the "after market" fuel pump was installed. Wondering if that is causing the problem.

We are finding there are no auto parts stores around here that will "Rent" out the fuel pressure gauge, and they want $40.00 to buy the darn thing. So we are thinking we may as well just replace the fuel regulator for $10.00. Not real sure. We have really dumped all available funds into this thing, and it is so frustrating because it is our only transportation. We are at our wits end

Hope it doesnt get towed from that parking lot before we figure it out

Thanks for your help and I appreciate any ideas on this nightmare!