Alright, I just got my ms2 3.57 and I'm trying to figure what modifications need to/should be done before I start wiring it up. The car/harness is a 91, and the engine/TPS/IAC are 94/95. I've found some contradicting information, though a lot of what I've read has been for the 3.0 board, but from the searching I've done this is what I think
needs to be done:
JP1 (tach input selection) needs to be jumped between 2 and 3 to be set to opto-isolator Hall tach input
J1 (tach selection) jump between 1 and 2 to enable the opto-isolator
XG1 and XG2 jumped
To eliminate noise a .1 microfarad capacitor gets installed between JS8 and GND
D1 and D2 need to be jumped? not sure what this does so idk if it needs to be done on the 3.57 board
For the above, I've also read that the tach selections should be set up for VR, not to jump XG1 and XG2, and then turn the screws on r52 and r56 counter-clockwise 5-6 turns. So I'm a little confused as to which is correct.
Originally Posted by megamanual
The fuel pump and fast idle solenoid outputs are now driven by a power driver IC (Integrated Circuit) from ST, the VNS3NV04D. This device will drive up to 3.5 amps continuous and has a clamp voltage of 40V.
This leads me to believe that no internal modifications need to be performed for the fuel pump, just take the purple #37 wire from the DB37 and wire it to pin 2O at the stock harness. Correct me if I'm wrong.
I've read that the 1k ohm resistors for the spark output have already been added into the 3.57 board, but it would be better if they were replaced with 330 ohm resistors, and even better if a pair of 2N2222 transistors were added. If I did want to add the transistors, are all the pin numbers the same as with the 3.0 board? Should anything be done differently since I'm installing 1zzfe coils?
In case it isn't obvious, I have no experience with circuit boards and my head hurts from trying to figure this out. Help is greatly appreciated and much needed!