Put in new 02 sensors and now the truck won't start

[Frank]

I failed the recent emissions so yesterday I was doing a tuneup and decided to replace the oxygen sensors on my '92 Ranger 3.0. After I put them in, I let it idle for about 15 minutes, went for a drive for a few miles and when I stopped it wouldn't start again. I had to put the old ones on just to get home.

After I got home, I put the new ones back on, reset the computer again and the truck started. So I ran it for about 20 minutes idle which sounded fine. After I turned it off, it wouldn't start again.

Also, when I turn the engine over for a few seconds, I can smell gas.

Anyone have any idea what's going on here?

[Wicked_Sludge]

interesting.

if it runs fine with the old sensors, i'd say at least one of the new sensors is defective. take them back and get new ones.