I just got my replacement injector yesterday since one of them from the original 6 was causing a severe miss at idle, like the pop off pressure wasn't set right.

 

I put the injector in my 01 Dodge Ram 2500 Cummins HO 6 speed 4x4 that I bought 12/5/2020, and it doesn't miss now, but it lopes like it has a cam in it. Unbeknownst to me as this is my 1st HO Cummins (my two previous were '99 Ram 2500 Cummins with a 47RE trans and SO VP44 pumps. I just found out that my Industrial Injection VP pump that is on my pickup when I bought it, is the HO pump. Apparently since the HO pump is a low volume/ high pressure pump, it can't provide enough fuel to feed the 100 HP injectors, hence the idle not being as smooth as normal. I removed them last night and installed my stock Bosch injectors and it runs smooth like it did before I installed the 100 HP injectors.

 

Since I only put 10 miles on the injectors, can I send them back and exchange them for 75 HP SAC injectors?

 

Thanks,

 

Doug

Edited January 10, 20214 yr by 99_Cummins_4x4

Ive read lots of threads and still scratching head

The other hard part is some of that stuff is from 2009 and things have changed somewhat in the performance arena since then. 

Like I know of a VP44 injection pump that can produce 1,000 HP plus without any help. Being I helped the member figure out how to increase the flow.

Edited October 13, 20213 yr by Mopar1973Man

You've teased this pump a few times now.. Are you able to divulge any of the secrets? I know a monster pump did that a few years ago.

 

 

Jeeze this was in 2013.. Feels like forever ago and just last year at the same time..

The gent I worked with we dual fed the pump through the body and normal fuel inlet. Changing the internal regulator. Boring all the feed passages open a few thousandth more including return. Then upgraded the front seal and increased fuel pressure to 30 PSI. There is quite a bit done. I think cam ring and shoes are different.

I was wondering if the pump inlet was one of the limitations. Seems so..

 

Wonder if it can keep up with sled pulling rpms.. 

Edited October 15, 20213 yr by Silverwolf2691