Ford OBD1 Systems
VEHICLES COVERED - TRUCKS/VANS - TEST CONNECTORS
68 3120d
Engine
8th
VIN
Digit**
Fuel Systems
(Carburetor
Model)
Application/Special Notes
Computer
System
1991-1994 (Cont)
4.0L V-6
X
EFI, MFI
Aerostar, Explorer, Ranger
4.9L I-6
Y, H
EFI, MFI, SFI
5.0L V-8
N
EFI, MFI, SFI
5.8L V-8
H, R
EFI, MFI, SFI
Bronco, E and F Series
Trucks/Vans (8500 lb. GVW or
less only)
7.3L V-8
M
Diesel
7.3L V-8
K
Turbo Diesel
7.5L V-8
G
EFI, MFI
E and F Series Trucks/Vans
(Excludes 1994 diesel models)
EEC-IV
1995
3.0L V-6
U
SFI
4.0L V-6
X
SFI
Aerostar (Excludes Explorer,
Ranger and Windstar)
4.9L I-6
Y
SFI
E and F series Trucks and
Vans (Excludes Natural Gas
equipped vehicles)
5.0L V-8
N
SFI
5.8L V-8
H, R
MFI
Bronco, E and F series Trucks
and Vans
7.5L V-8
G
MFI
E-350; F-250-350 (Excludes
California ); F-Super Duty
(Excludes Diesel)
EEC-IV
NOTES
* Carburetor Model. Carburetor model numbers are usually stamped on top of the carbure-
tor, or on a metal tab attached to the carburetor. Consult your vehicle’s repair manual for
proper identification.
**VIN Number. The VIN number(s) used in this column identify the vehicle’s engine type.
This number is the 8th digit of the VIN (Vehicle Identification Number). Consult your vehicle’s
repair manual for details.
Application Table Definitions. EFI = Electronic Fuel Injection; FBC = Feedback Carburetor;
MFI = Multiport Fuel Injection; OHC = Overhead Cam; SC = Super Charged; SEFI =
Sequential Electronic Fuel Injection; SFI = Sequential Fuel Injection
TEST CONNECTORS
Ford vehicles are equipped with
special test connectors that make
it possible to connect specialized
testing equipment that
communicates with the vehicle's
onboard computer. Ford's vehicle
test connectors are usually dark in
color (BLACK or GREY).
Sometimes they have a plastic
cover over them or are labeled
EEC Test. The connectors can be
found in the following general
locations in the engine compart-
ment:
EEC-IV TEST CONNECTOR
6-PIN
SINGLE
PIN
Summary of Contents for 3120d
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