RJSzynal
New Member
- Messages
- 19
- Location
- Scunthorpe, England
I've installed MS3 to my 1991 Soarer V8 (1UZFE) and just have the IAC and fuel pump to transfer control of.
I've attempted to transfer the IAC but as there are 4 wires (excluding 12V) in the IAC and 4 wires from Megasquirt I'm left with 24 different combinations for them to connect in plus I'm unsure whether it's a moving only or always on valve. I could go through every combination when I get time but there's still a chance I don't have the correct setting so I'd pass the correct wiring thinking it's not working.
My research indicates there are two coils with a connection at each end (Hence the MS outputs being named 1A, 1B, 2A and 2B) and that there should be about 50 Ohms between connections on the same coil and nothing between seperate coils but I get 50 Ohms between them all!!
The ECU pinout diagram seems to indicate that the coils are ISC1/ISC3 and ISC2/ISC4.
I read somewhere that it has 125 steps and have been using this setting, is that correct?
Any information about the stock IAC valve would be useful for me and anyone else who ever searches on here for the same information.
Thanks
Robert
I've attempted to transfer the IAC but as there are 4 wires (excluding 12V) in the IAC and 4 wires from Megasquirt I'm left with 24 different combinations for them to connect in plus I'm unsure whether it's a moving only or always on valve. I could go through every combination when I get time but there's still a chance I don't have the correct setting so I'd pass the correct wiring thinking it's not working.
My research indicates there are two coils with a connection at each end (Hence the MS outputs being named 1A, 1B, 2A and 2B) and that there should be about 50 Ohms between connections on the same coil and nothing between seperate coils but I get 50 Ohms between them all!!
The ECU pinout diagram seems to indicate that the coils are ISC1/ISC3 and ISC2/ISC4.
I read somewhere that it has 125 steps and have been using this setting, is that correct?
Any information about the stock IAC valve would be useful for me and anyone else who ever searches on here for the same information.
Thanks
Robert