2002 mustang gt no fuel pressure after new pump and filter

Fastback1014

New Member
Jun 17, 2018
3
0
1
30
Alabama
My 2002 gt was reading 0 psi I replaced pump and filter and now barely get 10 psi at Schrader valve but it also leaks so I doubt I’m getting a perfect reading. Car will not start. I spray starting fluid in air filter and it will hiccup so I know spark is good. I pull the line after the Filter and turn it to run and fuel shoots out very strong. Car will just crank but won’t fire thought about fuel pressure sensor but running out of ideas
 
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wmburns

SN Certified Technician
Aug 14, 2009
5,811
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Houston Texas
Turn the key on but do NOT crank. Does the fuel pump "prime" for a few seconds at each key on?

Did you replace the entire fuel pump basket or just the fuel pump? If you replaced just the fuel pump did you inspect the flexible line between the pump and tank hat for leaks?

A bad fuel rail pressure sensor (FRPS) is a "no start" sensor for the 1999-2004 model years. Inspect the FRPS connector for bent or pushed pins. Look for any evidence of corrosion. Double check that the intake vacuum reference line is connected and leak free. Inspect the vacuum line for evidence of raw gas.

Use a mechanic's stethoscope to listen to a fuel injector during cranking. Can you hear the "click" during motor cranking? I also recommend using a "noid" style test light to confirm power and PCM signal pulse at the injector.

Test for key on VREF 5 volt power at the FRPS between the BN/WH and GY/RD wires.

Beyond a doubt the easiest way to test for a possible bad FRPS is to use an ODB2 scanner to ask the PCM what it thinks the fuel pressure is. This also makes trouble shooting a bad sensor or wiring problem much easier.

Here's some more information that may be of help.

1996+ Crank with no start check list
https://www.allfordmustangs.com/forums/4-6l-tech/336452-1997-mustang-wont-ignite.html

ForScan ODB2 scanner w ELM327 USB
https://www.stangnet.com/mustang-forums/resources/forscan-odb2-scanner-w-elm327-usb.57/
 
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