Tbi fuel pressure gauge adapter

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I already searched through 8 threads and still have no answer
I need a fuel pressure adapter that has a Schrader valve. Preferably to screw Into the throttle body feed line. If not I can go with a post-filter adapter.
Anyone have any part numbers? I've got a 2.8, 4.3, and a 5.7 that this would be great for.
 

Schurkey

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I don't know of a "post-filter" adapter. This one goes in place of the filter, needed for certain applications where there isn't room behind the throttle body for the kind shown farther below.

www.amazon.com/Tool-Aid-37650-General-Adapter/dp/B0002SR544/ref=sr_1_2?crid=1NVH1CQT1VXF2

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and

www.amazon.com/OEMTOOLS-27167B-GM-TBI-Adapter/dp/B07CWW4ZQT/ref=sr_1_19?crid=1NVH1CQT1VXF2

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You do have to make sure that the Schrader valve included on the adapter is the matching one to the threaded end on your pressure gauge hose. I bought an incompatible adapter, then had to buy a dozen Schrader valves to get the compatible style (pack of 12.)
 

someotherguy

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The first one you linked would be useful for diagnostics in place of the fuel filter. The second one you linked is the one I would choose strictly because of its compact size, and can be mounted permanently behind the TBI unit, as I did on my old '94. I strongly suggest when you're not using it to cap it off so dirt doesn't get in the valve; an old A/C service port cap fits perfectly.

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Actron sells that same one for $10 and change. Actron # 0180-000-1465 for the fitting: https://actron.com/content/gm-tbi-adapter-716 - or you can buy their whole test gauge kit CP7838 for $50 and it includes the fitting: https://actron.com/content/professional-fuel-pressure-tester-kit

Richard
 

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I permanently mounted my fuel pressure gauge on the back of my Throttle Body. I got everything I needed from RV Morse Machine, before he passed away. I've had it on my truck for ~3 years now and it still works great. Total cost then was ~$130 including the AFPR.

These guys are proud of their stuff but, you can see what you need to do it, less a 90° 1/8" Street Elbow to get the gauge pointing out the side so you can see it.

 

tayto

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The first one you linked would be useful for diagnostics in place of the fuel filter. The second one you linked is the one I would choose strictly because of its compact size, and can be mounted permanently behind the TBI unit, as I did on my old '94. I strongly suggest when you're not using it to cap it off so dirt doesn't get in the valve; an old A/C service port cap fits perfectly.

You must be registered for see images attach


Actron sells that same one for $10 and change. Actron # 0180-000-1465 for the fitting: https://actron.com/content/gm-tbi-adapter-716 - or you can buy their whole test gauge kit CP7838 for $50 and it includes the fitting: https://actron.com/content/professional-fuel-pressure-tester-kit

Richard
i had a heck of a time bending the factory line to get this adapter to fit. YMMV
 

someotherguy

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i had a heck of a time bending the factory line to get this adapter to fit. YMMV
Which one? There are two linked; the first one is way too long to go behind the TBI. It's meant to temporarily take place of the fuel filter, IMO.

The second, much shorter one, fits fine behind the TBI. Usually you need to loosen the fuel line bracket at the bellhousing to move the line back a little bit, install the fitting, then tighten the bracket back down. I wouldn't have bent the line..

Richard
 

PlayingWithTBI

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i had a heck of a time bending the factory line to get this adapter to fit. YMMV
Usually you need to loosen the fuel line bracket at the bellhousing to move the line back a little bit, install the fitting, then tighten the bracket back down.
I was just replying to tayto's post with the same thing, ha ha. The adapter I posted fit fine after I did that ;)
 

1998_K1500_Sub

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This one goes in place of the filter

I had one of these in my toolbox and it rusted like the devil after the first use, rendering it useless... a "single-use" tool.

If you get one, coat it with light oil after use or it may suffer the same fate.

Since it replaces the filter when in use, rust will not be your friend.

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tayto

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Which one? There are two linked; the first one is way too long to go behind the TBI. It's meant to temporarily take place of the fuel filter, IMO.

The second, much shorter one, fits fine behind the TBI. Usually you need to loosen the fuel line bracket at the bellhousing to move the line back a little bit, install the fitting, then tighten the bracket back down. I wouldn't have bent the line..

Richard
I had thought about loosening that bracket on the bellhousing but then i proceeded to man handle the line. made it work but guess it would have made my life easier if i loosened that bracket.
 
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