01 Windstar
So I just got this van a few days ago. I
traded it for my car since I needed
something bigger. Anyways I have a few
error codes p0171/p0174 plus miss fires on
4/5 and (new)egr code. Everything I have
read says to smoke the van and check for
vac leaks. But all the codes are telling me to
change 02 sensors. The next problem is
hard shifting from 1st to 2nd. Trans fluid
looks brown and smells kinda burnt. It had
trans replaced in 8/10 so I'm guessing it
hasn't been changed since.
Would I be better off smoking the engine for
vac leaks or changing the 02 and changing
trans fluid and filter to fix the hard shifts?