What exactly causes a 299 to trip? What am I doing to piss off my truck? I have only gotten it a few times. Low throttle and boost and RPM, then roll onto it a little.

yellow? Anyone?

Have you looked at table C0806

This might help too.
http://www.dieselplace.com/forum/showpost.php?p=1622546&postcount=4

Dont tell me table #'s damnit.....I can never remember what table does what :p: You mean the target vane position?

I figured thats how things worked.

Problem being......its intermittent so its hard to log. It also goes like this.....if you log your "desired vane position" and your "actuall vane position".....desired dosnt realy seem to follow your table. Seems desired, TVCDES as I log, it is what the ECM figures it needs to put it to to achieve what ever boost.

This is how i understand it......

TCVPOS seems to be were the vanes are actuall at

TCVDES seems to be were the ECM is telling the vanes to go based off needing to hit what ever boost.

Here is how I understand it. Truck sees at x point I need to be at x vane postion(target vane position, postition in table) But it will over ride this to make target boost. It sees it needs to make what ever boost so it will tell the vanes what they need to go to. This number is what you log as the desired vane position(tcvdes). You can also log were the vanes are actually at(TCVPOS)

So how do you go about trying to get the target vane position a lil closer? What I have been doing is making a map of actual vane. Then paste the SOB into my tune and smooth that around a bit. And look at what point in my tune it varys way off from actual. This can be a slow assed process jumping back and forth. Then I go drive around some more and dump that info in there and keep tweaking and fine tuning that.

Right? Wrong?

I wish I knew how to log what was in the table....then I could just look and see were the little line for actual and the line for my table differed a bunch. Or it would be a lil easier if I had a driver and I could have them cruise around and watch were my truck was in the tune when it coded. If I could easily repeat it. Sometimes when I have a tunning issue I find it easier to have someone else drive me. Then I can also write tunes while they are driving.....speeds up the process a bit. Plus it isnt my ticket if we get pulled over for driving like a loon ):h

Phil

If the problem is intermittent? Try setting C0806 from 10(stock) to 600
like Turbo lcc suggested.
I think that should help.

Log it,

Build a MAP

Play the log and it will fill in the squares for you if you do it right...........:D

T;) NY

Tony, I think thats how I am doing it.....right?

Just make sure you dont use the cell count as your value you are showing or it will be all kindsa jacked up right? ;) :lol:

i believe that sets when you don't reach desired boost levels. the last lbz tune i tried is doing that i'm going to turn p0299 to no mil not reported in dtc's tomorow. try lowering desired boost a little.

Tony, I think thats how I am doing it.....right?

Just make sure you dont use the cell count as your value you are showing or it will be all kindsa jacked up right? ;) :lol:

It will also how you the average.

;)

Basically, the measured MAP pressure is more than 39 kPa below the expected range for 10 seconds. Off the top of my head 39 kpa is probably in the 4-6psi range

So you have an area of your desired boost table that is not being built up to. Now I have had luck with adjusting the vane position table or you need to figure out what area in your desired boost table you arnt hitting. Generally I found the 299 to set easiest when pulling long hills, maybe what you want to try logging.

If you log it, just look at actual boost numbers compaired to desired boost numbers, if its not not close, adjust it to equal what your actual boost was.