Yak
Explorer
Joined 16 years ago
User Profile
User Widgets
All Activity
- 474Views0likes0Comments
Re: Check engine
carringb wrote: samsontdog wrote: I went on line and found a rebuilt computer for my P/Up $299 plus shipping 3 yr warranty I wonder how hard to change one out? Takes about 5 minute a 9 mm socket. Nothing on a Ford takes a 9mm socket. A new PCM is blank and has to be programmed244Views0likes0CommentsRe: gear axle ratio question
WE3ZS wrote: Yak wrote: Remember to change the parameters in the PCM when you're done. Changing the final drive ratio does not require any adjustments to the PCM parameters. The speed is read off of the tone ring on the ring gear, so it is actually reading the tire revs and uses the revs per mile to calculate the speedometer/odometer readings. Changing tire size (diameter/height) would need the revs per mile to be adjusted in the PCM to have the speedo read correctly. I have changed both gears (3.73 to 4.88) and tires (31.6' to 32" to 35.28") and verified speed with GPS, gears didn't affect speedo but tires did. They also have a sensor on the output shaft. It's been a while but I'm thinking there are resetable parameters gearing and tire size361Views0likes0Comments
Groups
Travel Trailer Group
Prefer to camp in a travel trailer? You're not alone.Jan 13, 202544,029 Posts
