[bpu699]

Well, I am working on making sure my fuel system is up to snuff. I have a Harbor Freight near me, so I went and bought their "Master Fuel Injection Pressure tester." 89$, with a 25% off coupon, it was $75 or so with tax.

I thought I would share my experience for folks considering buying one of these.

First, you get an aweful lot for the money. Other testers can run $300 or so. Thats a lot for a tool you may not use often. The tool set is nicely packaged, and does include all of the connectors you would need.

I read a lot of the online reviews, and some folks complained that it leaked at the fittings. I used teflon tape to prevent this, and had zero issues.

I connected mine between the fuel distributor and the WUR. The pressures I was getting were somewhat wacky, and I knew they couldn't be right.

I had a system pressure of 100 psi (that sounds about right), and a cold pressure of 90. THAT can't be right. Switched the ball valve to the other side, no change. Put the ball valve back on the side nearer the WUR.

The pressure guage also didn't seem to go down once the valve was opened… odd.

Each connector of the kit has a tiny one-way shrader (?spelling) valve. These have absolutely tiny orifices. For the fuel to go throught the connectors to back to the WUR, it had to go through 4 (!!!) of these. The function of these is to keep fuel from shooting into your face, when you use the quick disconnects.

I figured these valves must be creating massive resistance, so I removed them. This made a world of difference. Now, it worked like it was supposed to!!!

I checked to make sure there was no further resistance, by leaving an open line and running the fuel through to an open container. Flowed easily, no issues.

With this modification, the gauges worked beautifully. The Shrader valves screw out easily with needle nose pliers. The gauge now worked well, and the results were repeatable. And, if I wanted, I can screw the schrader valves back in - no damage done.

For anyone looking for a fuel pressure tester, this one is highly recommended. Helluva value!!!

Bo