Re: Speedo out by miles..
Yeh my ef had the same problem. Only found out when the missus got done for 120km/hr when the cruise control was set for 100.
The guy I bought it off, put and xr6 motor and gearbox into it. Diff ratio for xr6 was 3.45 and the fairmont was 323 (by memory).
For every 5km/hr over 100, you reduce the gear in the speed sensor by 1. I had a #23 in the gearbox and reduced it to #17 to make sure, and now it's fine.
Best to be under by 5km/hr then over.
Another misconception is that if you have standard 15' wheels, and upgrade to 16' that this throws the speed out. Not necessarily as going to a larger wheel usually means you have a smaller profile, therfor diameter of the tyre stays the same.
Learn from other people's mistakes. You won't live long enough to make them all.
If there's commotion coming from the passenger seat, and nothing but earth going round and round outside the windows,.......then everything is not as it seems!
The only time you have too much fuel, is when you're on fire!
Last edited by rossi; 06-23-2003 at 17:38.