okay so then tuning the ve id just log the AFR error in the log and do the copy and past special by % to the ve table?Originally Posted by 5FDP
and would turning off the dfco get rid of the stall when i blip the throttler? its a manual.
okay so then tuning the ve id just log the AFR error in the log and do the copy and past special by % to the ve table?
and would turning off the dfco get rid of the stall when i blip the throttler? its a manual.
Last edited by dennyp20121; 02-22-2018 at 07:42 PM.
Yes, just copy and paste the results in your AFR Error histogram into your VE table using "paste special % HALF". You want to creep up on the correct #'s so do the % HALF multiple times or until you get your errors showing in each cell to be < +/-3%.
DFCO has nothing to do with the engine stalling when you blip the throttle. DFCO is only active when you are decelerating at speed the PCM cuts off the fuel (Deceleration Fuel Cut Off). Once you get your VE table situated, and your MAF table situated, then you can work on RAF. Have you done anything to your timing to help control your idle? Once you get those things worked out, it should idle without stalling.
not yet. i have to pull a few degrees to keep it from hanging thats all. other than that it idles nice. but i did notice in the data log that the map sensor is pegged at about 2k rpm so i think i need to get the 3 bar to start with.
I'd worry about getting your fueling down before you start swapping in more sensors. It's so rich now still if those fuel trims are correct.
Is fuel pressure correct at 58psi?
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
55psi at running
The problem I'm having now is that afr error histogram in the loger is only populating one cell.
You are likely missing something in the channels list or your graph layout if it does not populate correctly in the graphs.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Either missing or using mismatched parameters. The parameter you use in the histogram has to be the exact same one you are logging. For some of the parameters, manifold pressure especially there are several different manifold pressure parameters that give the same reading but have slightly different names. I had this issue when I first setup my histograms, was logging one version, and using another in the histogram.
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