NIStune TYPE 1 V.3.5 - Manual (Page 10)

Nistune Type 1 Hardware Installation Page 10 of 33
B. 1986 Single Board - Dual ROM ECUs
Vehicles: Z31 300ZX VG30 1986-1987, CR31 / VL / VLT RB30
Note: Some 1986 era ECU have both 28 pin (IC4) and 24 pin (IC5) chips which will need
removing. These chips are located next to each other.
1. Remove both of these ROM chips per picture below. The second smaller ROM is not needed
for normal ECU operation once the Nistune Type 1 board has been installed