Re: 99 ranger flex fuel problem!!!!!!!!!
You more than likely have a wiring issue. You need to check resistance on the wires going from the E85 sensor (flex fuel sensor) to the pcm. The wires will be the same colors at the pcm that they are at the flex fuel sensor. Resistance through the wires should be no more than 5-10 ohms.
Porsche/Ferrari Technician and owner of a '99 3.0 FlexFuel 5spd 2 wheel drive - bone stock