someotherguy
Truly Awesome
It's been years since I tested pressure down at the filter area vs. behind the TBI, but if I recall correctly, that same fitting can be used before/after the filter, if you choose to do so. Seemed like that's where I had it on my '94 when it was intermittently crapping out, and I carried the gauge around with me in the door panel pocket for a week or two until I caught it. A little tough climbing under a dropped truck to hook the gauge up which is why after I replaced the pump, I moved the fitting to behind the TBI.I looked all over Amazon for a photo of that style TBI fuel pressure adapter, and couldn't find one. Too lazy to take a picture of the one I own.
For the record, that adapter is the style that goes between the fuel hose and the throttle body. It's not the kind that goes in place of the fuel filter. Much better, in my opinion, since it measures pressure AFTER the filter, so if the filter is plugged...it'll show up on the pressure gauge.
Some folks have complained about that style of adapter leaking. Must have had damaged O-rings inside.
Richard