My truck is back!!!
I have been chasing an SES light problem with my truck all summer. Began when we towed the 5'er up to Bismarck for Memorial Day. Peaked with the pull out to the Black Hills and my frustrating time with the idiots at the local Ford dealership.
I was running a PMT1 code pcm in my early 99. It originally came with an XLE coded pcm. The shift strategy was nice...but I had a 3-4 shift flare that wouldn't go away. Anyway...I had a chance to buy another XLE8 pcm and put that back in the truck. I called DI to see if my PMT chip would work in the XLE box...and he said try it. Well...it does. Boy...does it ever. :evil:
In stock trim at WOP...my truck wouldn't go over 1k degrees EGT. With the PMT pcm...I had to back out at 1250...stock. With the chip in tow setting...my truck would hit 1300 degrees before 75 mph at WOT with the PMT...didn't come close to 1300 degrees with the XLE box. And in the daily setting...no smoke with the PMT box...but it got hot wicked quick. With the XLE box...nice black haze and EGT's were managable. Chirped the tires on the 1-2 and 2-3 shifts. And whats most important...no SES light. Oh...the shift flare is gone.
I also found out that not only did my truck not come with an AIH which my PMT box thinks it should have...but the early 99's had the baro in the wiring harness...while on the 99.5's and later they were put in the pcm. So that was another issue I was dealing with.
In the end...my early 99 just didn't play well with my PMT box.