VDH2+TNAA4

***cleatus12r*** · #1 Thu, May 13th, 2010, 10:08 AM

I'll email you a file to try, Dave. I know it works and if it doesn't work on the truck you're speaking of, then there is another problem.

***907DAVE*** · #2 Thu, May 13th, 2010, 11:27 AM

Damn.....thanks!

I will give it a shot, still curious what could be causing this.

***907DAVE*** · #3 Fri, May 21st, 2010, 11:02 PM

Well truck is still acting up....... even with the file you sent me Cody.

Still bucking at light throttle/ cruise conditions in ALL the programs except stock only when the engine is cold, warm it up a bit and it will completely go away.

Any ideas?

***cleatus12r*** · #4 Sat, May 22nd, 2010, 08:16 AM

Sounds like some kind of HPO issue to me, Dave.

***907DAVE*** · #5 Sat, May 22nd, 2010, 02:41 PM

But why does it NOT have any issues in the "stock" file?

The ICP, IPR% in the programs are almost identical to stock in the low rpm/ cruise ranges.

***907DAVE*** · #6 Sat, May 22nd, 2010, 03:24 PM

I might have forgot to mention that if you accelerate moderate to heavy it wont act up a bit. I would think an ICP issue would be aggravated by hard acceleration.

***907DAVE*** · #7 Sun, June 6th, 2010, 04:16 AM

Well got some testing done tonight and it is an ICP issue.

Funny thing is that it is commanding the IPR to drop pressure, then back up again repeatedly.

I graphed (Genesis) the IPR %, ICP, APP, and PW. When the problem occurred the IPR% and ICP would drop simultaneously, spike back up, drop, and so on. When oil temps climb both would increase and decrease smoothly, and the problem slowly faded away.

There was no spike up in ICP to cause the IPR to drop, both would fall at the same time. All the time the APP would hold constant, so rules that out.

Truck ran perfect before and perfect with a Superchip programmer.

Is there a possibility there is an issue with the Definition files?

Any ideas?