vortec.binThis is the bin I used in the data log.
vortec.binThis is the bin I used in the data log.
4444.xdl4444 should be the steady log.
I looked at the 3333 and 4444 log. Its better but your fuel tables still need a little work. You could hook up the wideband now and use its data to better see whats happening. You will never get it to stay at 128 at all times but the lower kpa ranges are rich and the higher ones are lean. If the miss or jerk problem is under transition, it could be need more or less fuel under those conditions, but I would get the steady state tuning done a little better before trying to tackle that. Having someone ride with you to see what cells are active in the logger when the problem happens would be helpful too. It may not be that at all, all we can see is numbers on the computer screen, but its a start.
Your spark logs look pretty normal, including the crazy 23039.682 and 420 numbers in the cells, its just something that happens when $0D in tuner pro goes to retard and a pretty good indicator not to take the information all too seriously. I have no idea why you are hitting 22 degrees of knock retard in the lower cells intermittently. You will see the average in that cell is just over 1 degree. I would pull one degree from several cells in that immediate area and see if it helps. Your at 198/ 205 temperature in all runs so you might switch it to a 180 degree thermostat. The hotter the engine the more likely it is to knock. In the spark advance tables with my van I noticed if I was not steady with the throttle at all times what appeared to be happening is numbers from one cell get logged into another. The crazy numbers filling the table seem to be with large and sudden changes in the throttle. I do not know that for a fact, but driving like a grandma helped my spark table look a lot like it should. Having a helper watch the table to see spark retard max might be interesting too. If the 22.5 degrees of retard gets set when you have your jerk or miss or what ever is happening it could be a clue.
Last edited by donf; 08-14-2019 at 02:24 AM.
I got a 180 thermostat, my shield gas refilled and the rest of the weekend to work on my truck. Thank you for all the info. I finally decided to set it to stay in open loop and see what happens, most all problems went away. I don’t understand why but it’s good to know that it’s going get better. There is not much power in open loop but it doesn’t stumble, shake and shut off when coming to a stop. What sensors are not used when in open loop? I’ve checked all the wiring under the hood and will check for bad wires underneath when I weld in the bung. I might drop the transmission as well to install a torque converter with a little less stall. I never mentioned the torque converter when I listed the mods, would that affect the tune?
The difference between open and closed is mostly in closed the computer is adjusting the fuel mixture. Do you have the wideband hooked up? The problem not happening in open loop is a pretty good indicator that your main tables still need work.
I should have the wideband installed by 3:00 PM EST
If you have the newer X series Aem Wide band you may want this. Not sure if its the latest version I fixed but its a lot closer than whats in the archives here.
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