Yeah he fixed that and I had the same thought but currently it works and no out of range cells. I am going to try just copying the differences over and doing a full re flash and see what happens.
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Yeah he fixed that and I had the same thought but currently it works and no out of range cells. I am going to try just copying the differences over and doing a full re flash and see what happens.
You have to fix the OOR in these parameters: A0001, A0002, A0012, A0013.
For A0012, A0013: set those to 511.
For A0001, A0002: set those to 99, save file, exit tunetool, restart tunetool, set those to 100, save file.
Also, B3647 is wrong (it contains values for B3605), for example what is open loop commanded fuel at idle.
Thanks joe I got those fixed. I need to do some RAF stuff my idle sucks
Well anyone been able to try it on thier ride?
Here is my most current tune I just pulled it from the pcm with everything working correctly
It seems to be in the system file, I did a segment swap of 9373619 and yes, now 4X4 low shifts, but my A/C quit. I flashed it back to the way I had it and the A/C works again. I am going to look for another segment and keep trying.
Theres already tunes that work what exactly are you trying to acomplish?
I want my 4x4 lo to shift and my A/C to work using COS3. I swapped the 9373619 system segment and 4X4 lo shifts, but the A/C won't come on, no codes, works with scan tool activation, but if it is on with the scan tool and I hit the AC button it shuts off the compressor and says "AC pressure out of range". Maybe the wiring is different for the truck AC? I took the computer and harness from a 2000 Camaro. I tried system segment 9373554 from an 02 silverado and 9373941 from an 02 avalanche, neither worked with the AC (did not bother to check 4lo). This is in a 93 Toyota 4X4 with a 4L60EQuote:
Originally Posted by Whipped383
See post #45 that one works with 4lo and 2 bar map. Are you running the l31? I know theres a diference in the camaro pressure switch and the truck pressure switch, alot of guys are swapping to the camaro switch so they can run E fans. I know for a fact a few guys that have posted here have done that
I looked at the diagrams this morning, the trucks have a high and low pressure switch the camaro has the one presure switch on the hi side. Post #45 uses 9373619 segment, which makes the 4X4 lo work, but the AC is wired different. I will poke through alldata and see what I can find. People are using the van segment, but isn't that 2WD?
I looked at the diagrams this morning, the trucks have a high and low pressure switch the camaro has the one presure switch on the hi side. Post #45 uses 9373619 segment, which makes the 4X4 lo work, but the AC is wired different. I will poke through alldata and see what I can find. People are using the van segment, but isn't that 2WD?
The van segment was blended with a ZR2 tune to get the low working from my understanding. Check over on ppe theres lots of guys there that are aware of the 3 wire ac sensor. From what I recall they had to use the base tune here and use tunercats to get whatever they needed in the system file for the 3 wire sensor. EFIlive is not capable of adding whatever it is thats needed to make it work properly and theres lots of guys over there that can help you out.
Thank you....I will probably just heliarc the new sensors in and wire it like a truck....Quote:
Originally Posted by Whipped383
Acronyms....ha. What is PPE? Try a search for it see what comes up....LOL
thank you!!!Quote:
Originally Posted by eaglemark
Still no luck, I tried swapping a 01 truck engine segments into my tune, but after swapping everything over truck will not start.....uggg.
OK, so I'm bringing up an old thread as I'm having issues making 4lo work. My project is as follows: 1998 GMC Savana extended cargo van, converted to 4WD. 0411 PCM/L31/4L80e/US Gear 20% Underdrive/NP205 equipped with switches on both the Hi/Lo range and 2/4WD shift rails. Here is what I did to get 4lo working, I downloaded the file posted in post #7. I merged this file with the '02 express van file I've been modifying to make the performance shift mode work for the underdrive when engaged (Underdrive in Low - 1.25:1) and Normal shift mode work with the Underdrive in pass through mode (Underdrive in Hi 1:1) - (see v14_... tune file) note this tune file is pretty much a stock L31 '02 e van tune with modified shift tables, TCC engagement tables, Speedo and a few other things and it stays stuck in 1st gear if the transfer case (NP205) is shifted in to low range (1.96:1)... Starting with the tune file from post #7 I did segment swaps from the tune file I had been modifying for the for the Underdrive (v14_...), the only segment I did not swap in from this file was the system segment (see v13_... tune file), which by all the post I've read seems to contain the invisible parameter(s) that allows 4lo to work normally and have the transmission shift through all the gears, so this segment is unchanged from the file from post #7. So this tune file (v13_...) worked and when the transfer case was shifted into low range I was able to get the 4L80e to shift all the way to 4th gear...Quote:
Originally Posted by s10mods
However... there is one undesirable and baffling side effect that I noticed. With the tune file that includes 4lo shifting correctly (v13_...) I now have a problem in that something is wrong with how the transmission is shifting with the transfer case in high range (1:1) and driving at normal road speeds, so at around 20-35MPH the transmission wants to lurch into 4th then back into 3rd, back to 4th rapidly all this happening under the specified speed for the 3-4 upshift in the performance shift mode (had not tried to see if this issue is also present in "Normal" shift mode). See the log file LS1B_0028 showing this issue with the v13_... tune. After capturing that data I then swapped back to the v14_... tune file that does not allow 4lo to work correctly and it shifts fine (no 3-4, 4-3 hysteresis) in performance shift mode, transfer case in high range at normal road speed and seems to shift inline with the modified performance shift tables, see LS1B_0029 for this data.
The only difference between these two tune files (unless I made a mistake or am not understanding the implications of using a tune that was originally intended for a 4L60e) is the system segment. All other segments should be identical, what am I missing here?
Anyone have some thoughts on what to try next to get 4lo to work and not have bizarre 3-4, 4-3 shifting issue? Any help would be greatly appreciated.
I did develop my own spreadsheet to check and make sure my shift tables and TCC engagement used the following rules:
(2-1)<(1-2)
(3-2)<(2-3)
(4-3)<(3-4)
(1-2)<(3-2)
(2-3)<(4-3)
(2-1)<(2nd TCC Rel)
(2nd TCC Rel)<(2nd TCC App)
(1-2)<(2 TCC App)
(3-2)<(3rd TCC Rel)
(3rd TCC Rel)<(3rd TCC App)
(2-3)<(3 TCC App)
(4-3)<(4th TCC Rel)
(4th TCC Rel)<(4th TCC App)
(3-4)<(4 TCC App)
Perhaps I still have something wrong in the shift tables or spreadsheet used to check them (I'm not seeing it at the moment) or I need to increase the 3-4, 4-3 shift speed spread (is 4MPH difference to little at 25% TPS)???
Thanks,
Mark