A few questions
thanks a bunch a millions!
The progression of engines is as follows
6.9L IDI (IDI = Indirect injection) - The first diesel in Ford pickups, introduced in 1983 model year. Mechanically controlled.
7.3 IDI - Basically the same engine as the 6.9L, but with a higher displacement. Introduced in 1988 model year.
7.3L Powerstroke - First computer controlled diesel in Ford pickups. Introduced in 1994.5 model year.
7.3L Powerstroke (Superduty) No major differences in engine, just the major body style change in 1999.
6.0L Powerstroke - The newest diesel offered by Ford. Introduced in 2003.
I indicates 6.9 liter IDI non-turbo.
M indicates 7.3 liter IDI non-turbo.
C indicates 7.3 liter IDI turbo. ('93 model year)
K indicates 7.3 liter IDI turbo. ('94 model year)
F indicates 7.3 liter DI turbo. (7.3 liter Power Stroke)
First year for the 6.9 - 1983
Last year for the 6.9 - 1987
By 1988 all production 7.3
6.9 - Max H.P. 175 Torque 318 ft. lb.
7.3 - Max H.P. 185 Torque 338 ft. lb.
6.9 max torque at 1800 RPM
7.3 max torque at 1600 RPM
Both max HP at 3300 RPM.
Fuel mileage will be dependent on IP/injector condition, axle ratio, trans type and you driving habits........post some info.


