matth0le
+1y
Just a heads up guys, I am an electrical tech so I have gone a bit in depth for some folks. I had to do this to make it work.
My setup was an automatic transmission. The manual and auto trans trucks use the same ECM so I basically clipped off every wire that went from the ECM to the TCM. Most wires are shared for MT/AT models. A few of the wires to the main plug were colored different for the auto /manual tranny version but were clearly labeled on the Kia schematic. The Kia schematic is a lifesaver BTW. There were some sensors that the ECM required but I did not have. Two sensors not really needed that I did not have were the fuel pressure sensor that was part of the sending unit on the Kia gas tank or the chassis acceleration sensor mounted to the frame. I fooled the ECM to see the sensors. Both sensors receive 5 V and sent back 2.5 V when all is normal. I took a 5 V reference voltage out of the ECM (pin 71 & 59), tapped into it, used a simple voltage divider (two same value cheapy resistors soldered together) to bring it down to 2.5 V, and sent that 2.5V back into the ECM for the two sensors I was missing (pins 76 & 80). Cheap, easy, and seems to work fine.
The crank angle sensor picks up the notches in the flywheel to send to the ECM for engine speed and BTDC reference. This can probably be used for any ECM setup stock, Megasquirt, or otherwise. I tried to emulate what the Kia trans had and make my own mount for this sensor. As long as the gap between the flywheel and sensor is correct and the angle at which then sensor is oriented on the trans it should work fine.
I used a stock truck FI tank with fuel pump. I sent a wire back to the pump from the Kia fuel pump relay to power the pump.
Any other question I will be glad to help out with any problems. Just ask. I've been busy with a salvage RX-7 that I bought for the IRS. Finally got that out of my garage and now have room for the Mazda that will soon have an RX-7 IRS.