NOS 1994 GM Truck Diesel Truck Fuel Pressure Regulator

[WarWagon]

What is the back story for this?

Friend brought this to my attention. We are both going :???:

Picture is an optical filter harness and a 1/4" fuel line thread in part of some sort. Maybe TSB for excessive fuel return and adding the harness to some 1994's?


GM Part:

REGULATOR

Part NO.:

12553873


http://www.gmpartsgiant.com/parts/gm-regulator-12553873.html

http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=140596651395

 

[JMJNet]

IIRC, that threaded part is part of the IP.

I can be wrong though.

 

[THEFERMANATOR]

The threaded one is teh return or dump line off of the IP. It has a spring loaded checkball inside of it I believe to regulate internal IP pressure to the 4-6 factory spec.

 

[Brooklyn Tow]

The threaded one is teh return or dump line off of the IP. It has a spring loaded checkball inside of it I believe to regulate internal IP pressure to the 4-6 factory spec.

IIRC, SS sells the "Return Regulator" .......He's the only one I've ever seen offer one.

Here is the description, Just like FERM said.....

Fuel pressure regulator/check valve for all 6.5 trucks, all years, Including all C/K trucks, G/P trucks, Suburbans, Tahoe's Yukon's, Van's, School buses and Hummer H1's. Fits and is correct for all DB2 and DS4 pumps, mechanical or electronic injection. On the 6.5 injection pump the regulator is built inside the return line fitting. It maintains the required 3-5 psi fuel pressure. It also acts as a check valve to prevent the reverse flow of fuel to the tank while the engine if off. If your fuel pressure is low, it may be a bad regulator valve. Symptoms of low pressure are stalling, hard starting, and a hesitation or stumble on acceleration. To check your pressure use our test gauge ssd-242 or permanently mount our ssd-215 gauge kit. Installs in minutes with basic hand tools. Also fits all 6.2 diesels too!

 

[Burning oil]

Something like this might work and be cheaper. I do not have a price, but if interested I will check on Monday.
Its a one way valve with a 4.5# spring.
Drill out (if needed) the old fitting and install the new one in the line.

 

[THEFERMANATOR]

Something like this might work and be cheaper. I do not have a price, but if interested I will check on Monday.
Its a one way valve with a 4.5# spring.
Drill out (if needed) the old fitting and install the new one in the line.

View attachment 32929

If you could check for me please. I may have a use for something like this for the BURB.

 

[Burning oil]

Will do.

And WW I got your pump screen on the way.

 

[Brooklyn Tow]

Is this "regulator" in the actual return line/hose.....or is it attached to the IP and the return line connects to it?

Any pics of the location?

 

[NVW]

Louis, I think it is the return line fitting in the IP.

Is this "regulator" in the actual return line/hose.....or is it attached to the IP and the return line connects to it?

Any pics of the location?

 

[Brooklyn Tow]

Louis, I think it is the return line fitting in the IP.

Probably pretty hard to get a pic of that:???:.........I bet that would cause some HARD starts...

 

[ak diesel driver]

that's the one you put the clear line on when checking air. it's right on the front of the IP

 

[buddy]

Its something on every IP to begin with. I could have sworn it should be higher pressure spec than that. Although its the one spec not mentioned in the DS4/6.5 training manual I have. It might be better to bump it a couple psi.

 

[Burning oil]

If you could check for me please. I may have a use for something like this for the BURB.

Got a price, but there is a $200 minimum order from this supplier. The valve is $19.99 and has a buna rubber seal. More chem resistant valves can be had for More $$. Were you going to use it for fuel?