Datsun Brand's Products

MODEL OF CAR

YOU WANT TO

UPGRADE

CONFIRM THAT

YOUR CAR’S 02

SENSOR HAS

THIS NUT SIZE

ECU(S) THAT

CAN BE USED

FOR THE

UPGRADE

ALTERNATE NO.

FOUND ON

OUTSIDE OF THE

ECU

81-85 ZXT 22MM 23710-25P01 A18-A00 M42

81-85 ZXT 22MM 23710-25P00 A18-A00 M84

81-85 ZXT 22MM 23710-25P11 A18-A01 M43

81-85 ZXT 22MM 23710-25P10 A18-A01 M85

81-85 ZXT 22MM 23710-25P06 A18-A02 M44

81-85 ZXT 22MM 23710-25P05 A18-A02 M86

81-85 ZXT 22MM 23710-25P16 A18-A03 M45

81-85 ZXT 22MM 23710-25P15 A18-A03 M87

86-89 300ZXT 17MM 23710-26P01 A18-A04 M46

86-89 300ZXT 17MM 23710-26P00 A18-A04 M94

86-89 300ZXT 17MM 23710-26P11 A18-A05 M47

86-89 300ZXT 17MM 23710-26P10 A18-A05 M95

86-89 300ZXT 17MM 23710-26P06 A18-A06 M48

86-89 300ZXT 17MM 23710-26P05 A18-A06 M96

86-89 300ZXT 17MM 23710-26P16 A18-A07 M49

86-89 300ZXT 17MM 23710-26P15 A18-A07 M97

1 Confirm that you have the correct ECU for the upgrade using the table below. If your car is a 1984-87

you will need to obtain a good 1988-89 ECU of the correct part number found in the table. It is impor-

tant to confirm the type of O2 sensor now being used in your car. This can be quickly checked by meas-

uring the wrench size used to remove it and confirm that it is the same as the size in the second column

below. Once you have the correct ECU to be upgraded, it must be reprogrammed by Jim Wolf Technol-

ogy before it will work with this upgrade.

2 If your car is a 1986-89 you will need a fuel rail set from a 84-85 model that uses top feed injectors. The

part numbers are 17521-V5220 for the left fuel rail and 17522-V5220 for the right fuel rail. This will

convert you bottom feed injector (2 hoses to each injector) system to accept the 420cc top feed injectors.

3 Install dropping resistors (see diagram at lower right) by cutting each injector signal wire near the ECU

connector and solder a resistor inline with each wire. Use shrink tubing to insulate all bare wire and sol-

der joints. Arrange the resistors so the wires are relaxed and are not squashed into the other wires. The

injector wires are the 6 wires connected to the ECU at pins #101 thru 106. These are located on the lower

connector (as seen mounted in the car), it has 3 rows of pins. Pins #101 thru 106 are the 6 pins in the row

opposite the connector lock tab. This step is necessary because the 420cc injectors are low impedance

and need resistors to lower the current flowing through them.

4 To install the 93 Cobra Mustang MAF sensor refer to the page on installation of the MAF sensor.

5 If your car has had the Nissan factory injector recall, refer to the page on this subject.

450 HP ENGINE CONTROL SYSTEM UPGRADE FOR

1981-89 280/300ZX TURBO

Installation/ECU selection

Z31 INJ MAF 88+ECU UPGRADE.PUB

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

INJECTOR WIRE COLOR CHART