Originally Posted by
Jesse1975
I'm going to update this as well and hopefully it will just continue to improve. It threw 3 more codes, engine light came on and I reset them. I was hoping they were all due to the ECM now running it's stock programming and a bunch of items that have been asleep for a while getting used again. It appears that is the case and none of those codes have come back yet. I did get the P21DD DEF heater resistance code, but I've had that one once before and I'll deal with it if it doesn't go away.
So for now I'm good.
One other interesting thing is watching the ignition timing on the Edge. It was always a positive number, between 0-15 maybe depending on how hard I was on the throttle, now it spends a fair amount of time below zero, it ranges from -7 to 7 or so with no real rhyme or reason. Once it's warm, and at highway speeds, it seems to be almost always above zero, with being at zero or 1 at idle. Any input on why it is injecting fuel after top dead center would be welcome. It was more drastic right after the ECM flash and seems to be trending in the right direction, but I thought I'd ask here. I've only seen the negative/post TDC injection timing during regens before this.
And I can also see the mileage reduction after taking out KD tune
Is there any harm or is it unwise to annually flash and reflash the ECM? I miss the tune...
Thanks
Jesse
Get a spare ECM for your KD tune.Emissions time put in the stock one.the rest of the 364 days run the KD one.
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews