Working on my 2003 s10 with a 2003 5.3L swap. im running a 2005 express van calibration to make everything work properly in the s10.
For the first month or two and couple thousand miles everything worked fine. Then one day i lost lockup on the highway. next day i got a cylinder 5 miss fire. found a plug wire that was too close to the header and assumed that would fix my issue. fixed the plug wire and still no lockup.
i thought i might be getting a random miss and maxed out the missfire tables. still no lockup.
Then i set the trans to lockup at low speed in second so i could log the problem in the neighborhood. I can see on the scanner that the brake switch is working properly, low tps is working. the TCC state switches from off to apply enable to locked. TCC PWM goes from 90ish to 100ish (thats what the tune is setup for). I can command 100% TCC PW and lock the convertor from the scanner and i get full lockup. But when i try and let the PCM command lockup it will never lock.
Im still running the stock s10 trans with 170k on it. I want to verify that its a mechanical issue like i think before i go digging into anything.
attached is my latest tune and log file. in the log file anytime the verter is locked is when i commanded it with the scanner controls. no lockup scan.hpl111914 missfire detection changes 2nd gear lock.hpt