Its a dumb question but how do i test the fuel pressure
on a 94 LT1 . Thanks

 

U need a fuel pressure guage that hooks to the fuel rail at the back of the intake. You can get one at autozone or one of you local parts stores.
Brad

 

The schrader valve is located on the fuel rail, back of the heads, passenger side. It should have a plastic cap on it.

When you get a gauge w/hose, make sure the connector will easily fit on the valve (since it is really tight back there.)

Place a rag under the connection to catch any spilled fuel.

Gauge should read around 44-47 with the vac hose OFF the regulator and around 38ish with the hose on.

When removing the connection, wait til the pressure bleeds down on your gauge before you totally disconnect it and keep the end in the air so as to not dump the fuel out of the hose.

Now do you remember where you placed the schrader valve cap???

 

Should i drive the car around with the gauge connected ?
Or should i just start it and rev it ? Thanks

 

Actually, you just need to have the ignition switch on so that the fuel pump is working.

Also, it is a good idea to remove your gas cap when you are messing with the regulator so as to relieve any extra pressure in the tank. And, just like the schrader valve (don't forget to put your gas cap back on before you go for a ride).

I'm sure there will be those who disagree with my opinion here, but what the hey.

 

Should have mentioned that the engine should be on. Minor oversight.

I'm sure that you would get a better idea of what your pressure is if you DID have the sucker attached to your windshield as you drove around, but the Vac line test will give you a ball park reference. JMHO

 

Should i remove the little valve in the fuel line or leave it in there ?
Thanks

 

Check the pressure gauge connector.... the true "test gauges" include a small pin that presses down on the Schrader valve core, so you can get a reading.

 

Thank you very much for all the replys

 

is it stupid to try and test it under load?? by either tapeing it to your windshild or trying to hold it in your hand as you test drive.

 

No, it is a good idea, you know if you fuel pump is worling like it should.

http://shbox.com/1/fp_reg.jpg