Smoke Control

***907DAVE*** · #1 Sat, April 17th, 2010, 09:52 PM

Funny because I posted this morning but I guess it didn't stick.

At idle Duty% seems to float around 7%-8%, so I dont know if that is causing me any issues.

Cody, is the .4-.5 ms limit on the injectors because of the delay in the PCM to IDM communication then the actual mechanical delay in the injector itself?

What is even more interesting (to me) is that while cruising the PW is typically around 1ms @ +/- 1200psi, so in reality is the injector is actually on injecting fuel for .5ms.

Well what I did was return the PW in the Idle range to where it was before, then use the MFD map to pull additional fuel from the specific ranges I was experiencing the smoke. Seems to work very well now, very minimal smoke, much more stable idle, and the Cruise Control is MUCH happier now.

Still needs some more tweeking on but I am inching closer. Now if I could just get the Converter Duty% figured out.

Thanks again.

***907DAVE*** · #2 Tue, April 20th, 2010, 01:07 AM

Well its back to the drawing board..........

With a few more minor adjustments truck was behaving perfect. Almost no smoke under 3/4 throttle, shifting was good, power was good......... until today.

I was attempting to cross the highway which was very busy, my turn came so I stabbed the pedal and nothing. Ohhhh crap, luckily I made it across unscathed but definitely not acceptable. I did some experimenting on my ride home and it was just in the sub 1500 range that there was no power, ease into it and you would never know anything was wrong.

I am unsure what I took too much away from, but I think it is the MFD map..

Maybe there is no cure for these injectors, but I will keep on trying.

***907DAVE*** · #3 Tue, April 20th, 2010, 11:16 PM

Can you please explain exactly how the ICP is increasing when you decrease PW. I just cannot see how it is happening, even though I know (well think) it is.

Also, what happens in the ICP map when MFD is higher than 47 mg/ Stroke.