I am have the same prob with my 92 4runner I just I am only gettin code 25. Lean fuel. While I had it on the scan tool in school I looked to see what the o2 was reading and it came up as if it was. Still on open loop and the temp was -95c.. so on friday I replaced the coolent temp drove about 15mins and my light went back on. When i get into school tomarrow I am going to. Rescan it and see what code I get.. i

 

It seems to me that the question is how good a price you can get the truck for. The problem is probably the O2 sensor, they do fail with age. It might be a good idea to take a look at it to see if it has been replaced. All of these old trucks are going to have emissions problems, and if the truck is a steal, buy it and just accept that you will have to fix things.

 

it was an exhaust leak at the manifold. Thanks for the suggestions guys

 

Cool beans!
gonna buy it?

 

We'll see if it gets sold at the auction. To be honest I wasn't overly impressed. I'd just rather wait for the exact same truck to show up with a blown motor for a quarter of the price.
Basically I got a great parts truck that I want to get my money out of.