1991 F-150 inline 6
 

Hi i am about to buy a F-150 1991 with a inline 6 5 speed the owner says it has a bad MAP Sensor, this is i am thinking a pretty not to expensive do your self thing right?:cool:

Duralast/MAP Sensor | MAP Sensor | 1991 Ford F150 1/2 ton P/U 2WD 6 Cylinders Y 4.9L FI | AutoZone.com_

It was on the firewall, passenger side of my '93.

They are easy to change, BUT:

- they rarely go bad
- most people's diagnoses are not even close

Mine wasn't bad. One day when I was tinkering with the truck, I decided to take it apart and see what was inside. Big mistake.