To insure precise fuel control when performing power upgrades on 84-89 300ZX turbo models, please inspect
the injector wire looms to see if Nissan has performed the injector recall modifications. During this recall, the
injector wires are replaced. To reduce the labor cost of the recall, all three injectors on each side of the engine
are wired together to the center injectors original wires (SEE PICTURE BELOW). The 300ZX turbo uses a
group mode injection timing (cyl. 1,2,3 and cyl. 4,5,6 are injected as alternating groups) that is adversely ef-
fected by the recall modification. If you find this recall modification was performed, the injector wires must be
restored to their stock configuration. This can be done as follows.
1 Disconnect the battery as the ECU may be damaged.
2 Carefully cut back the tape and covering material on the injector wires.
3 Cut the injector wires going to injectors on cyl. 1,5,2, and 6 (all except the middle injectors). The cut
should leave the maximum length on the injector side so cut them as close to the junction in the loom as
possible. Tape off the wire ends on the loom side to prevent electrical shorting of the wires.
4 By cutting back the tape added during the recall, find the original injector wire pairs for the #1,5,2, and 6
injectors. See below for wire colors.
5 Using solder and shrink tubing, connect the injector leads you cut off in step 3 to the wires you located in
step 4. Retape the loom and connect the injectors and battery.
REESTABLISHING THE CORRECT INJECTOR TIMING ON
84-89 NISSAN 300ZX TURBO IF THE FACTORY INJECTOR
RECALL HAS BEEN PERFORMED
RIGHT SIDE SUB -HARNESS ADDED BY NISSAN DURING INJECTOR RE-
CALL
CUT HERE
CUT HERE
INJ # ECU PIN # V- (FROM ECU) V+ (FROM BAT.)
1 101 GRN RED
2 102 GRN/BLK RED
3 103 GRN/BLU RED
4 104 GRN/YEL RED
5 105 GRN/RED RED
6 106 GRN/WHT RED
Z31 INJ WIRE FIX.PUB
