Gents,
I’ve been working this issue for the last couple of weeks. I have a 98 Series 1 and a 97 wreaker I'm using for parts. The 98 has ECU 23710-0V310 (Hitachi board not supported by Nistune). My first experiment was to get a JECS type ECU, # 23710-0V810 (late 98 on) and plug it into my Series 1. Immediately upon ignition I get a check engine light. Using Nissan Data Scan, I get a code 26, no boost sensor pressure. The car idles alright, about 500 rpm, a little low but steady. I take the car out for a drive and at first it drives o.k., again idle is a little low and tranny acts like it's slipping a little. Then after about 5 minutes the transmission selector switch (Power/Snow) "Power" light comes on and stays on regardless of which way its push. Also, the tranny acts like it has a 3000 rpm stall speed and moves slow until the car gets to around 50 kph. Second try was to plug in an IMPUL tuned ECU I have (JECS type with ability to solder in a daughter board), which is supposed to be for a 98 Stagea but the car acts the same way. I put the stock ECU back and all is normal. The pin out I got from the board (R34) shows pin 47 as the boost sensor reference and that it’s a red wire. The wire I have going to both the 97/98 ECU connectors is red/brown. I’ve ordered a full set of Shop Manuals (in Japanese) for my specific Series 1. Hopefully, once I get the manuals and translate the ECU pin out, I’ll be able to figure out which wires are doing what and how different the Series 1 and 2 pinouts are.
Any suggestions?
Cheers,
Mike