1990 VW Golf GTI Digifant II
16VT’s involvement: Wired in fully functional plug and play Megasquirt ECU; calibrated fuel, ignition and idle.
Forced induction: none.
Engine: 1800cc, RV engine code, 8valve, stock.
Injection: Port injection, 185cc/min highZ injectors, Bosch coolant and Bosch intake temp sensors.
The objective was to replace the limited Digifant 2 system
with the megasquirt. A suitable adapter was made to link the megasquirt
to the digifant 2 loom. All stock sensors were used. Megasquirt v2.2 PCB was utilised.
MS GROUNDS (8,9,10,11,12,13) go to T25/13, T25/19
MS SENSOR GROUND (19) goes to T25/6
MS MAT (20) goes to T25/9
MS CLT (21) goes to T25/10
MS TPS SIGNAL (22) wired externally
MS O2 SENSOR SIGNAL (23) goes to T25/2 (and also tee-ed in cabin to blue wire)
MS PIN 24 goes to T25/8 (hall sensor 12V supply via internal megasquirt jumper)
MS PIN 25 goes to T25/18 (hall sensor signal to 4N25 via XG1)
MS TPS Vref (26) goes to T25/11 (red/blue)
MS +12V (28 ) goes to T25/14
MS FIDLE (30) goes to T25/23
MS INJ1 (32,33) goes to T25/12
MS INJ2 (34,35) wired externally (green)
MS X14 (31) goes to T25/25 (coil)
MS FUEL PUMP (37) goes to T25/3