ok so i posted about a smoke diagnosis a few weeks back. the problem went a way for a while, then the truck threw codes and started smoking again. the smoke is bluish whet with hints of black in it. the truck uses no oil. I also have the trans dropping in and out of overdrive. the battery cables are clean. the following codes are shown 622, 743, 753, 1765, and 1693. i installed a mystery switch so 743,753, and 1765 are probably from using the switch. the one than makes me wonder is the 622. i have seen where faulty alternators cause the overdrive problem and I am wondering if noisy power from the alternator is somehow causing the truck to over fuel? any thoughts before i buy an alternator?

 

well i re cleaned the battery connections today. maybe that will slow down the hunting for over drive. I will get some batteries for my oscope in a while and check and see if the 12v supply has any noise on it. i am betting that i will need to have an alternator for it but my main concern is that the alternator is switched thru the ecm. man that would suck if i had to replace it. i guess the saving grace is that it's a good excuse to upgrade to something a little peppier.

as for the smoke, i tore into the turbo today and found an unusual amount of oil sludge at the compressor wheel. i am thinking i lost an oil seal on the turbo shaft. i ordered a rebuild kit from high tech turbo in salt lake. man i like that place, great service and great prices. we will see if that solves my smoke issue.

 

i recently had a problem with my truck searching, no for overdrive but locking and unlocking torque converter. put in two new batters. then i wrapped the ground wire from the passenger side battery going behind towards alternator with aluminum foil and taped it. no more searching. seems like the shifting is better thoughout.

 

yeah i guess the pcm is pretty sensitive to noise on the supply side. the batteries are pretty old and are on the list for replacement but i wanted to save up the cash before jumping in. i re cleaned the battery cables and that seems to have cleared up the smoke issue and the searching issue for now but the alternator is acting whacky. i guess i will have to see what else it throws out at me and solve all of the problems one at a time.

 

A throttle posistion sensor was my OD jumping issue. it got to the point where it didnt want to go in OD at all. I belive you guys have the same TPS setup just yours cost more.

 

i haven't seen any evidence that the apps is out yet. if it does go bad i will order a timbo1 replacement. cleaning the battery cables again seems to have helped a bunch although they weren't that dirty. i have a feeling that i will be doing batteries and possibly an alternator soon. we will see.

 

mine was showing the trottle position senser code, but the batteries and wrapping the wire in aluminum foil took care of that code too. 1 month and 1000 miles and it hasn't come back