Switch From Diesel to Gas.

lenr wrote:
Yes it uses the Bosch CP4 HPFP as does GM. These pumps are just fine as long as you do not add gasoline, ethanol, water, DEF, etc. to the fuel.

I have to disagree with you here. You are not fine just as long you do not add gasoline, ethanol, water, DEF, etc. to the fuel. Condensation can form in the tank even when the only thing you ever put in there is #2 diesel. Not only that, but many other contaminates can be in the fuel that you pump in.

The CP4 with its two pistons(instead of the three with the CP3) had to work overtime to make higher pressures than the CP3. This plus how the CP4 cools itself made them considerably more sensitive to contamination versus the CP3. Then there is also the fact of how it failed. The CP4 would grenade cause metal particle to be carried throughout the fuel system.

Many of my old customers in the oilfields were having issues left and right with the CP4 pumps because their main supply of diesel was an above ground tank on the yard. The fleets that had CP3 pumps on their diesels hardly had any issues using the same fuel because it was not so sensitive to contamination damage.

Fuel injection pressure and volume has a lot to do with the amount of power a diesel makes. High pressures makes pumps more sensitive to contamination and heat failures. A 15 micron particle may be fine to pass through a diesel with 19,000 psi fuel pressure, but that size would wreak havoc on a diesel with a CP4 with 29,000 psi fuel pressure. There is no free lunch and generally if you increase fuel pressure for more power, then you are decreasing reliability while increasing contamination sensitivity.