never seen one with the hoses. If you don't have fuel in those hoses it probably isn't going to measure the pressure. The ones I always saw/used just went right on the rail. try opening the T enough to see some fluid and see if it reads.

This is assuming you checked the inertia switch in the back, fuses up front and you can hear the pump priming.

 

I believe the clear hose it to drain the fuel at the gauge after you take a reading. Put the clear hose in a container, conduct your test and then push the pressure release button on the brass T. This will release the pressurized fuel through the clear hose and into your container.

 

Appreciate you guys stepping in.

Drove it today about 40 miles through town, and got a very minor hesitation once on acceleration in second and third gear.

I tried another gauge from Oreilley, and still no reading with the Key On, and after Starting. Pretty sure I've got it hooked up correctly as I followed these instructions. I just added the Gauge to that adapter.

 

I'm wondering if the shrader valve is working inside of the threaded port on the fuel rail. You're obviously getting fuel to the cylinders.

I'd attach the gauge again and run the plastic tube to a container.

Have someone start the car and then you'd push the pressure relief button briefly.
Is fuel flowing through the gauge and into the container now?

 

Double post.

 

fasterthangas, appreciate you stepping in.

Very strange. I have a second '93 2.3L Stang with the Valve in the same spot and tried the gauge on that one, and still no reading.

 

Does the hose have the depressor feature on the end that pushes down the plunger on the Schrader? Without that feature, you will never get pressure in the line.

 

In the picture he posted of the Oreilly's gauge, it shows the pin in the center of the brass adapter. Hopefully it's still there being a rental tool.

 

If you press on the Schrader valve fuel should come spraying out. You won’t be able to tell how much pressure it is, but it will be a sign of pressure.

 

I don't know much about the Valve, but since the car is driveable, that means there is pressure going to the valve correct?

 

The valve works exactly like the valves on your tires. To put air into the tire, your device presses the plunger down and that opens the valve.

So just like when you were a kid letting the air out of some punk's bicycle tire, take a small screwdriver and depress the center pin. I typically put a rag on the end when i do this. Some fuel should spray out. Be careful doing this as there is risk of fire, so obviously do it in a well-ventilated space, and the engine is cold.

The fuel pressure gauge works the same way. The unit needs to depress the pin for fuel to flow into the gauge and pressurize it. SO there is a feature on the end meant to depress the center pin. Make sure it's there and able to depress it

 

The valve works exactly like the valves on your tires. To put air into the tire, your device presses the plunger down and that opens the valve.

So just like when you were a kid letting the air out of some punk's bicycle tire, take a small screwdriver and depress the center pin. I typically put a rag on the end when i do this. Some fuel should spray out. Be careful doing this as there is risk of fire, so obviously do it in a well-ventilated space, and the engine is cold.

The fuel pressure gauge works the same way. The unit needs to depress the pin for fuel to flow into the gauge and pressurize it. SO there is a feature on the end meant to depress the center pin. Make sure it's there and able to depress it

Great minds think alike.

 

Yup. Lets see a pic of the Schrader valve too while we are at it.

 

Sure thing. And reminder, I have a 2nd Stang a '93, and tried the two gauges there as well. That valve is in the same spot.

 

It "should" but sometimes they aren't made correctly and they don't.

ks