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What causes the metering valve to open? I understand when the FSOS is powered up it allows the metering valve to open and then the spring in the FSOS pushes the metering valve closed when there is no 12 volt power to it therefore shutting the flow of fuel and shutting down the engine. So is it...

I checked the specs on the drill I'm using and it spins 2000 rpm's, I did spin the drill just for about 45 seconds after I installed the transfer pump gauge and it went to 85- 90 lbs. I want to give the ATF a chance to work before I just waste it all running it through at barely a dribble out of...

It's barely spitting it out, when I had it on a engine I wouldn't get any fuel at the injector lines. I installed another IP on the engine and it performed as expected, plenty of fuel at the injectors and it drops a cylinder if I crack open an injector line. Here is a couple of pics of the...

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Well I ran the drill for about 15 minutes on the pump and I got some fluid to peak out the return line hose but it still didn't flow up and over the hump in the hose and down into the bucket. When I operate the throttle open I can feel and hear the load on the drill change, but it's still just...

If I'm not mistaken if I just turn on my lift pump on my P400 with a DB2 it will flow fuel out the return line without turning the engine over.

Yes I have 12 volt power and ground going to the FSOS, also have the throttle to wide open. I can't get any fluid to flow out of the fitting on the top of the pump, I just have this hose going into the bucket along with the other 8 hoses, and I'm really not getting much fluid out of the 8...

Here's some pics of what I'm doing...I'm not getting any fluid coming out of the top of the pump, then I got to thinking, when installed on a engine the excess fuel coming from the injectors is what is feeding this line, back into the top of the pump, correct?

Ok guys, I've got the DB2 pump rigged up with a electric pump with an adjustable fuel pressure regulator set at 20 lbs with it's own return line going back into a gallon of ATF. I have a piece of 1/4" clear vinyl going into the pump inlet along with 8 4 ft long 3/8" clear lines going into a 5...

I have them, I'm just trying to find out the best way to get them out without gouging up the bores in the block where they are pressed into.

They are three separate parts, there is two different relief valves and a "cap plug" which looks like a small freeze plug with about a 1/16" hole in it. I removed the cap plug on a Guinee pig block I have by drilling about a 1/8" inch hole in it and using a slide hammer with a screw in it, but...

Like the title says, I'm looking for information regarding the removal and replacement of the two oil pressure relief valves in the GM 6.5 or 6.2 engine. Not sure if a slide hammer with a screw in it is the way to go. I tried google but couldn't find anything.

Before I took the pump off of the engine that I'm trying to run on an engine stand, I took the top off of the pump to make sure that the shut off solenoid and related mechanisms were working properly. With probably 5 lbs of lift pump pressure it would fill the pump but when I turned the engine...

I just remembered back in 2019 I sold ak diesel driver a GM new DS4 with like 500 miles on it that had sat on my shop shelf here in Florida and he had a problem getting it to run right and he told me he ran Bio diesel through it and it cleaned it out and ran fine as far as I know. I don't have...

I have a few IP gears laying around, I think I will weld something that will go to a drill and try the ATF trick. We'll see how it works.

I didn't know if running transmission fluid through it might work. With like 10 PSI inlet pressure and some way to turn the pump drive at a couple hundred rpm's.

I have a DB2 pump that is on a motor that has been sitting for some time, the engine was pulled several years ago and ran fine but now I can't get any fuel out of the injector line ports. I removed the top and the shut off solenoid and linkage is working properly and it's getting fuel.

Like the title says I'm looking for a 6.2 oil pan for 1988-1990 GMT 400 4 wheel drive truck for a 2 piece rear main seal block. Preferably with the oil pump pickup assembly. Let me know if anyone has one. Thx

Hey Ferm, I PMed you about coming to pick up that long block, give me a call.

Ferm, I'll come get that block if you can wait about three weeks, my wife is having some major surgery this coming Friday and I need to be around to take care of her for at least a least a week after and I don't think I can get there before this Friday with everything going on. Your about 2:45...