MAF sensor checked out ok, was cleaned and then changed with no improvment. I took it in to a shop and they finally figured on a plugged converter so they changed out the cats and it straightend out for the most part, it runs smooth and has decent power again but now it has a tap in the right side just like a lifter so they pulled off the head and changed all the lifters on that side and it improved somewhat but definately did not go away. Also the oil pressure is noticeably lower once it warms up. When the tech changed the oil after changing the cats he said it was very thick and almost tarlike. I had just changed it and it had less than 600 miles on the oil change. I'm thinking maybe this motor needs to be flushed out as it may be partialy plugged or would you suspect the oil pump. When the head was off the tech said everything looked like brand new inside. I was thinking that the plugged converter must have caused the oil contamination but I've been told that a converter rare'ly plugs unless unless there is something causing it. I don't want to spend too much more time on it as I can get a used engine for about $1000 and change it myself. I was just wondering if you have any other ideas?
Friday, March 26th, 2010 AT 1:23 PM