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Are you adding a car lift at some point?

Welcome. No, lack of a proper lift pump will ruin the ds4 or db2 much sooner. Some permanent changes are suggested to solve the issue now & for future. You have a ds4 ip (injection pump). Out the front of the ip is a 1/4” fuel line in an upside down U shape. Replace it with clear line. You...

Wish I knew something about the ally trans to help. All I know is they take a beating and live forever. Might need to find a specialized forum since they don’t fail all that often.

The reason Marty is asking is if there is air in the line before you start, the “burp” of air will cause a hard start and often smoke when it does because the first batch of fuel isn’t burning properly. Then maybe no air intrusion while running…

100%!! Keep the other engine, they used to be cheap, now they are getting harder to find at a good price. Set up your camera to watch the clear line for the next couple of cold starts. Then if that turns up nothing, I would begin with doing the water down intake trick to clean out all the...

Did that just start happening?

White smoke is unburned fuel, water from humidity, or coolant. As good as it isn’t for your lungs, smelling the smoke tells you what it is.

@MrMarty51 measures at the ip inlet is what counts. 8-14 is ideal range. But if out of range, I would rather 1psi high than 1psi low.

Maybe his truck is just under pressure to perform?

As to problems from the system- the same design actually came from the racing industry, known as gear drive. The idea that vibrations go through the gears into the injection pump and cause issues is as ignorant as can be. Ignorant as in someone is uneducated. The db2 pump used in gm before...

I see ya made it here. Hopefully someone has a spare they are willing to part with. For those unaware, Leroy has ran out of current stock and any next availability from him is undetermined.

Just post a pic of your old one

Gm is always using undersized wires- penny pinch on copper costs. Multiple places the wiring should be increased.

Yeah, same opinion. Unless you are going to replace the engine with something mega powerful- replace the 4l60 with another one. B&M, summit, and a million other places sell them built to withstand more load than you can produce. Towing that load down the highway with a th400 that is only 1:1...

No orings. No pipe tape or dope. Clean threads and snug it up. That is a flare fitting. It seals by simple compressive force.

Wait… so this isn’t some kind of torque monster build thats gonna happen? I thought with the heavier duty axles going in that the trans was getting the big upgrade for power that is next or already on an engine stand like an 8.1 Please explain your plans for the finished truck, and how you are...

Just remember acid to water is safe water to acid removes you from your body.

Yes but it will require more modifications than just swapping them. The transmission mount will be relocated as will the transfer case swapped or modified by changing the input shaft from 27 to a 32 tooth. This also leads to drive shaft modifications. I remember you shorten the rear shaft...

Then I wasn’t clear. Stainless steel is harder than the mild steel the hinge is made of. Stainless steel rubbing on stainless steel will require an outside lubricant or they will seize together eventually and the bushing will then start to spin in the mild steel hinge. It isn’t that the...

The snubber is what smooths out the gauge. But usually the bigger pumps that run non stop have a recirculating hose and that calms the pulse.