![]() ![]() So yet again I went back to low speed calibration only let that finish to 100% which it did fine then against my better judgment I keyed off and then try to start of course it wouldn't start. So I tried to write it on low speed and then I tried after that finish to write entire on high speed and low speed and it timed out. That high-speed timed out when I tried to write the calibration only. ![]() So high speed timed out on write entire and low speed timed out on write entire. So I just did a right calibration and mind you this is the first time that I've ever written to this ECU. My main concern was getting a full right one way or another just to get it to you know finish. So I switched it over to write calibration and of course I haven't switched off the power or anything at all. ![]() So I could not write and tire using high speed or low speed it would time out at about 2%. Okay so I just ran into this issue with a 2004 Silverado 4.3 with a p59 in it. (Running the latest VCM v4.8.7 as of this post). After that, my truck then fired up and everything worked like it should! Just something to maybe try if you're getting timeout issues during writing? I will also note, I ran into this issue with the new MPVI2 Pro, I did not have this issue with my MPVI1 Pro, so it's got something to do with the newer HPTuners box that didn't happen on the original one. Only took round 2 minutes total to write, so not terrible (way better than "another brand" programmer I used to use in the early days). When I tried it again after that, it wrote just fine and completed successfully. What I ended up doing to get it to work was just unchecked the "Use High Speed" check box. I do also have an aftermarket radio with a CAN adapter module for remote on signal and has the door ajar beeper (since the original was in the stock radio). Every time I pressed Write, it would initialize and erase the ECU, then when it got to the actual writing step, sometimes it would get to 20%, sometimes only 5%, and sometimes it would just stay at 0%, the a few seconds later my gauges would fade out, and it would timeout. I'm still learning about this but those of us who have a t-case different than factory or perhaps maybe even double transfer cases for a 4LOW LOW range could really use this feature.I also had the same issue in my 2005 Silverado (P59 ECM). ![]() On our 4wd-equipped automatic vehicles, it's my understanding that the PCM receives a signal from the 4LOW shifter and grounds pin 16 (I'd like to talk to someone about this 'fact' actually) which is kind of like a performance/tow-haul mode button to tell the PCM you're now in 4LOW and to shift differently. I'd imagine the field could look something like this: Factory Wranglers even come with 4:1 (those equipped with the NP241OR transfer case) so it's got to be a value that SOMEONE entered at one point to tell the tranny to expect higher RPM's and lower speeds. The common GM 4wd LOW gear ratio is 2.72:1 and I think that's just assumed by the software or the PCM/BCM (I don't know and would actually like to know what piece of hardware controls this). Those of us in the off road community have been saying how nice it would be if HPT gave us the ability to dictate the 4LOW ratio used to determine automatic shift points when not in 1:1. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |