Comanche91
01-20-2013, 08:39 PM
Here's a simple little mod that saves you time by enabling you to check your fuel pressure any time you want. The parts:
1.) A 0-60 PSI liquid-filled 1-1/2" fuel pressure gauge from Jegs, p/n 555-41012
2.) A brass 1/4" flare x 1/8" female NPT straight adapter fitting from here: http://www.casperselectronics.com/store2/product_info.php?products_id=1337
Use teflon tape on the gauge pipe threads then snug it on the adapter:
http://i182.photobucket.com/albums/x297/comanche91/2-5.jpg
After the engine has been sitting overnight and is cold, bleed any fuel rail pressure off first by depressing the Schrader valve needle. Have a rag handy in case the fuel squirts out. Then remove the core needle from the fuel rail Schrader valve w. an extractor tool, same tool used for bicycle tires.
http://i182.photobucket.com/albums/x297/comanche91/1-5.jpg
My ever-present red-eyed helper:
http://i182.photobucket.com/albums/x297/comanche91/3-5.jpg
Screw the assembled gauge and adapter on the Schrader valve. Since it's a flare, do not use teflon tape, and do not over-tighten:
http://i182.photobucket.com/albums/x297/comanche91/4-4.jpg
Start 'er up and check for leaks. Hmmm, I'm about two PSI low:
http://i182.photobucket.com/albums/x297/comanche91/5-2.jpg
1.) A 0-60 PSI liquid-filled 1-1/2" fuel pressure gauge from Jegs, p/n 555-41012
2.) A brass 1/4" flare x 1/8" female NPT straight adapter fitting from here: http://www.casperselectronics.com/store2/product_info.php?products_id=1337
Use teflon tape on the gauge pipe threads then snug it on the adapter:
http://i182.photobucket.com/albums/x297/comanche91/2-5.jpg
After the engine has been sitting overnight and is cold, bleed any fuel rail pressure off first by depressing the Schrader valve needle. Have a rag handy in case the fuel squirts out. Then remove the core needle from the fuel rail Schrader valve w. an extractor tool, same tool used for bicycle tires.
http://i182.photobucket.com/albums/x297/comanche91/1-5.jpg
My ever-present red-eyed helper:
http://i182.photobucket.com/albums/x297/comanche91/3-5.jpg
Screw the assembled gauge and adapter on the Schrader valve. Since it's a flare, do not use teflon tape, and do not over-tighten:
http://i182.photobucket.com/albums/x297/comanche91/4-4.jpg
Start 'er up and check for leaks. Hmmm, I'm about two PSI low:
http://i182.photobucket.com/albums/x297/comanche91/5-2.jpg