Desert Diesel 2

I ran some Edge injectors a couple of years ago(2's & 3's) that loped and drive me crazy. Put in Mach 1.6's and have not had a lope problem since..about 3 years on them now.

Pliny the Elder

Gasser's.........

hotdram

After about 2 years, I developed a slight lope on mine when the weather started getting hot, not bad, had to really pay attention to notice it.
I would rather have the lope and M1.6's than the no lope and stockers though

~Rob

Symon623

So if it truely is only in the trucks without Crank position sensors? How do you know which set up you have?

I just bought a set of 1.6's but their not in the truck yet?

hamilton cams

I have seen this for a long time with different injectors. I think it might have somethng to do with an imbalance in the injectors flow rate and pop pressure. Being as it is always worse when hot and diesels being compression ignition, it has something to do with fuel burning faster or hotter in one or a few different cylinders. I noticed it to be worse if I changed the size of the line or connector tube. It would be nice to have the injectors popped and flowed to either confirm or disprove this and also narrow it down to the exact cause.

Zach

Joe Diesel

original post from Don M
I have never figured out the lope problem 100%. Pop pressure adjustments can help some trucks, but not all of them. VP replacement to the SO pump has fixed many of them as well, but again, not all.

I am convinced it is idle circuit related. The engine idle is adjusted by rotation sensors, either crank or cam depending on year. If the pulse change is large enough to spin the rotation sensor faster than normal, the system tries to cut the fuel back to adjust the rotation speed. That starts a chain of events that cause the bouncing idle or lope.

Over the years I have had maybe a handful of people with this issue that we could never get fixed.

As a final "fix" to try, larger injectors may cure it. Mach 4 or larger. They are large enough to not have as sharp of a combustion event early in the cranks rotation. This softens the cranks rotation or takes some of the jerk out, so to speak.

from the main man himself from a post on here back on 05/04/10