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Thread: Fuel pressure gauge

  1. #1
    Fuel Injected!
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    Fuel pressure gauge

    So the adapter with fuel pressure gauge that I had ordered over a week ago finally came in
    But....

    When I opened the package the instructions say this adapter screws between the fuel filter and the the line coming from the tank
    Are the threads the same to the ones on the throttle body so that I can visually see the fuel pressure while driving to test and tune my fuel injector data?
    Otherwise I'll have to have my gf ride in the back holding the gauge but i doubt she is very fond of the idea.fuel pressure.jpg

  2. #2
    Fuel Injected! BLG355's Avatar
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    No. Looks like you have the same one I do. I have a digital gauge that threads on to that adapter that I borrow from my brother when I needed to check pressure while driving.

    I found it seems fairly decent of a gauge setup, although mine is a little off. I have the adapter installed and left it in for now. The only time I hook it up to make adjustments or if I am trying things.

    http://www.rvmorsemachine.com/product.htm

    They make one that threads into the regulator housing on the throttle body. And it costs less than the Actron one.
    My Build: 95 K1500, 355ci w/ OEM roller setup - zero decked, Eagle steel crank, Scat bushed H-beam rods, Speed Pro 2V flat top pistons - Rotating assembly balanced. Dart 165cc Iron Eagle S/S heads - 72cc chambers - 1.94 / 1.50 valves. Isky roller cam - 204/209 dur @ .050 - .480/.496 lift with Comp Magnum 1.6 rockers, Edelbrock 3704 intake - Bored to 52mm - 454 throttle body, Delco EP381 fuel pump @ 18 psi running through 80# 454 injectors. Hedman Headers into 3" Dynomax exhaust.

  3. #3
    Super Moderator dave w's Avatar
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    The pictured adapter looks like the same one I've mounted on the throttle body to measure fuel pressure. It's sometimes easier to mount the fuel pressure tester by the fuel filter. Usually the fuel filter outlet and throttle body inlet are the same thread.

    dave w

  4. #4
    Fuel Injected! BLG355's Avatar
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    The adapter he has should be 16mm x 1.5, which is very common GM fuel filter fitting. The fuel line adapter fittings that thread into the throttle body are 14mm x 1.25 and 12mm x 1.25.
    My Build: 95 K1500, 355ci w/ OEM roller setup - zero decked, Eagle steel crank, Scat bushed H-beam rods, Speed Pro 2V flat top pistons - Rotating assembly balanced. Dart 165cc Iron Eagle S/S heads - 72cc chambers - 1.94 / 1.50 valves. Isky roller cam - 204/209 dur @ .050 - .480/.496 lift with Comp Magnum 1.6 rockers, Edelbrock 3704 intake - Bored to 52mm - 454 throttle body, Delco EP381 fuel pump @ 18 psi running through 80# 454 injectors. Hedman Headers into 3" Dynomax exhaust.

  5. #5
    Fuel Injected!
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    Quote Originally Posted by BLG355 View Post
    The adapter he has should be 16mm x 1.5, which is very common GM fuel filter fitting. The fuel line adapter fittings that thread into the throttle body are 14mm x 1.25 and 12mm x 1.25.
    Well crap I guess I'll have to return it then just my luck
    First the tranny, then the engine, now this.

  6. #6
    Fuel Injected!
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    Okay after a quick search I found a post saying that the inlet side is 16mmx 1.5 and the outlet is 14mmx 1.25
    http://67-72chevytrucks.com/vboard/s...d.php?t=583392

  7. #7
    Fuel Injected! BLG355's Avatar
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    It happens...I lost compression on two cylinders. One was still reading 110, but the other was 40psi. all the rest were 175. So I decided to rebuild the engine, but I was still using the truck every now and then. After washing it one day, I pulled on to the main road and did a nice long 1st into 2nd gear burn out, and when it hit second, it went BOOM! The rear planetary failed. I went from having to rebuild both units, to building them both, an then learning to tune on top of that! It's been on heck of a ride and I surely know that banging the head off the wall feeling! It feels like one step forward and two steps back sometimes!
    My Build: 95 K1500, 355ci w/ OEM roller setup - zero decked, Eagle steel crank, Scat bushed H-beam rods, Speed Pro 2V flat top pistons - Rotating assembly balanced. Dart 165cc Iron Eagle S/S heads - 72cc chambers - 1.94 / 1.50 valves. Isky roller cam - 204/209 dur @ .050 - .480/.496 lift with Comp Magnum 1.6 rockers, Edelbrock 3704 intake - Bored to 52mm - 454 throttle body, Delco EP381 fuel pump @ 18 psi running through 80# 454 injectors. Hedman Headers into 3" Dynomax exhaust.

  8. #8
    Fuel Injected!
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    I hope my promotion kicks in at the end of the month or sooner before I end up stranded.

  9. #9
    Fuel Injected! BLG355's Avatar
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    Quote Originally Posted by trippyjoey View Post
    Okay after a quick search I found a post saying that the inlet side is 16mmx 1.5 and the outlet is 14mmx 1.25
    http://67-72chevytrucks.com/vboard/s...d.php?t=583392
    Excellent! I didn't even think about that. I was thinking about in place of the fittings that thread in like the one in the link. Is there enough room to squeeze that in there?
    My Build: 95 K1500, 355ci w/ OEM roller setup - zero decked, Eagle steel crank, Scat bushed H-beam rods, Speed Pro 2V flat top pistons - Rotating assembly balanced. Dart 165cc Iron Eagle S/S heads - 72cc chambers - 1.94 / 1.50 valves. Isky roller cam - 204/209 dur @ .050 - .480/.496 lift with Comp Magnum 1.6 rockers, Edelbrock 3704 intake - Bored to 52mm - 454 throttle body, Delco EP381 fuel pump @ 18 psi running through 80# 454 injectors. Hedman Headers into 3" Dynomax exhaust.

  10. #10
    Fuel Injected! BLG355's Avatar
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    Quote Originally Posted by BLG355 View Post
    Excellent! I didn't even think about that. I was thinking about in place of the fittings that thread in like the one in the link. Is there enough room to squeeze that in there?
    http://www.jegs.com/p/Russell/Russel...71024/10002/-1

    I have a set of these I bought when I wasn't sure how I was going to do the fuel system...that is how I know the thread size going into the regulator housing. I never even gave a though to what dave w was saying about the actual line. That's great to know, I might move mine!
    My Build: 95 K1500, 355ci w/ OEM roller setup - zero decked, Eagle steel crank, Scat bushed H-beam rods, Speed Pro 2V flat top pistons - Rotating assembly balanced. Dart 165cc Iron Eagle S/S heads - 72cc chambers - 1.94 / 1.50 valves. Isky roller cam - 204/209 dur @ .050 - .480/.496 lift with Comp Magnum 1.6 rockers, Edelbrock 3704 intake - Bored to 52mm - 454 throttle body, Delco EP381 fuel pump @ 18 psi running through 80# 454 injectors. Hedman Headers into 3" Dynomax exhaust.

  11. #11
    Fuel Injected!
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    Yeah so if I disconnect my fuel line that feeds my throttle body I should be able to fit this fitting between the throttle body and the fuel feed line to pick up the fuel pressure reading right before the regulator.

  12. #12
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  13. #13
    Fuel Injected! BLG355's Avatar
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    You may have to wrestle it into place but it should thread in.
    My Build: 95 K1500, 355ci w/ OEM roller setup - zero decked, Eagle steel crank, Scat bushed H-beam rods, Speed Pro 2V flat top pistons - Rotating assembly balanced. Dart 165cc Iron Eagle S/S heads - 72cc chambers - 1.94 / 1.50 valves. Isky roller cam - 204/209 dur @ .050 - .480/.496 lift with Comp Magnum 1.6 rockers, Edelbrock 3704 intake - Bored to 52mm - 454 throttle body, Delco EP381 fuel pump @ 18 psi running through 80# 454 injectors. Hedman Headers into 3" Dynomax exhaust.

  14. #14
    Fuel Injected!
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    As long as I don't strip the thread

  15. #15
    Fuel Injected! EDZIP's Avatar
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    Quote Originally Posted by trippyjoey View Post
    Yeah so if I disconnect my fuel line that feeds my throttle body I should be able to fit this fitting between the throttle body and the fuel feed line to pick up the fuel pressure reading right before the regulator.
    Yes...I have a couple of them that I use to test fuel pressure via the GM throttle body fuel lines.

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