Purple Drank

Hi im new to the forums so I'm not sure if this is in the right place, so i appolgize if its not. I have a 1991 Mustang 5.0 LX, and i purchased a air to fuel ratio gadge awhile back and wanted to hook it up now the only problem is i have no idea were the oxygen sensor is. Any help would be appreciated, thanks!

samseed101

It screws into the exhaust between the headers coming from the engine and the cats. But just to save you some time and possibly money, a narrowband O2 gauge will most likely be pretty useless for you. You'll need a wideband sensor to get any real use out of the gauge you bought.

lxman1

There are two of them. They are as mentioned above, in the exhaust pipe between the headers and front converters.