well the other day i noticed that my check engine light came on and that my truck was shifting gears kinda late.

so i replaced the tps and reset my computer but now theres a clanking sound coming from my cat after i drive the truck for about 10-15 mins. and i am still experiencing late shifts.
i also noticed a little bit of oil coming out of the tail pipe (probably from mine blown plenum)

i dont have a tach but i do have a gps, and i shift to 2nd at about 23 mph and 3rd at about 52 mph the tc locks up shortly after that, at about 55 mph

i think it might be that my cat is clog as i had a friend who had them same kind of problem, and just removed the cat and got his truck to run fine.

im just curious as to what yall think it could be?

and i just want to thank yall for hosting such a great site with so much information and having the ability to help out others

 

Hmmm... blown plenum, noisy cat, oil out the pipe. Fix the plenum, replace the cat, be happy.