New to 6.2 I need help

[AWG]

I'll try to keep this brief and answer any questions as folks might ask them going foreword.


I have owned a 1989 1 ton 4X4 GM van for many years (love the thing), the 350 was never a cheap date when it came to fuel. It's on it's way out so I purchased a 1989 truck with a 6.2 to replace the gas engine.

That truck ran very well when parked two years ago, the batteries went dead and fuel soured so I wasn't able to just fire it up to run on occasion. So it's been a while since it ran, I finally have time to do the transplant and I thought getting it running in place before pulling it would be helpful.


That's the preamble, now for getting to know a 6.2.

This must have a electric fuel pump as there is a cover where the mechanical pump would be, I'm looking for a proper fuel line so I can pull it and get some fresh fuel to the engine.

(I have a couple new batteries to work with now).



First question: I have been thinking this model engine was pretty much mechanical, please tell me there is a way to operate this without a ECU?
(All kinds of electronic doodads I'm seeing).



Second question:
Where is the fuel line going into the injection pump?
(Sounds like a stupid question but I can't see a thing way down in there).



I am new to diesels, save the work I have done on my old tractor.
Any help or suggestions on this project will be most appreciated.


Thanks very much in advance folks.


~A

[AWG]

I forgot I had purchased a GM 6.2L manual, I answered my own question.


In my application, can I just use a fuel/water filter like I have on my tractor instead of this electronic separator/sensor thingy?

[Robyn]

A RACOR 2 MICRON FILTER WATER Separator will work fine.

Use one that can handle about 40 gallons per hour flow
(Fuel is used to cool the pump and thus the need for the volume)

A 5 micron will work, but the 2 micron will catch more crud.

RACOR 230R2 IS MY FAVORITE unit for these engines

[AWG]

Robyn,


Thanks for your help on the separator.


I'm finding it difficult to get fuel to follow having drained the tank, I understand there is a 'interesting' fuel pick-up system on these.
Can I use the tank, pump and new filter from my old gas system when I get the diesel new or is that a mistake?


Thanks again, ~A

[DmaxMaverick]

Using the gasser fuel pump is not advised. They produce too much pressure (the Diesel requires any pressure above zero under load, and up to around 10 PSI at idle). Add to that, the gasser fuel pumps don't last long pumping the higher viscosity Diesel fuel.

[Robyn]

Use the electric pump that is spec'd for the truck.

Mount it along the frame somewhere close to the fuel tank (These pumps like pushing rather than sucking)

Wire the pump so it receives 12V when ignition is on....but it needs to have a oil pressure controlled circuit that shuts off the fuel when there is zero oil pressure (Safety in case of a wreck)

The oil pressure switch on the 6.2 engine should have 2 circuits in it.
One circuit goes to the gauge...the other runs the fuel pump.

Don't run the 12v power directly through the switch to the pump.

Use a relay to control the power to the pump and the oil pressure switch to run the relay.

Wire in a momentary primer button to prime the system ...filter change etc.

As Maverick mentioned....the gasser pump is a bad choice all the way.

Remove the fuel pump from the sending unit and add a fuel suction tube to go to the bottom of the tank.

OR.... Get a diesel fuel sending unit assembly that fits the vans tank.

NOTE

If there is a compatibility issue with the oil pressure sender on the diesel engine and your van.....use the vans original gauge sender and put a TEE in the oil pressure line at the rear of the engine and add the one from the diesel in to run the fuel pump.

Many ways to get things working right..

Grab the electrical connectors off the salvage truck to use.

GET CREATIVE