- Thu Feb 28, 2019 8:49 am
#32396
Was checking something on the car - redrew the fuel pump wiring on one page - might be helpful to share. Let me know if there are any mistakes.
I actually had a misconception that the Circuit Open Relay contained a discrete RC + BJT circuit that performed a prime when you first activated ignition. But this is definitely not the case - it's two coils on a common core, RC snubber i guess to prevent arcing on the AFM contacts.
The contacts on my COR were pretty crusty - I'm just going to replace it with a standard 20A SPST.
0001.jpg (362.91 KiB) Viewed 2662 times
Notes:
This shows a superset combination of MX5 + Speeduino + Origional AFM - obviously if you read the instructions your not supposed to have the AFM connected at the same time as the speeduino.
This shows ST SIGN fuse fitted - you want to remove this when the Speeduino is fitted, the wiring diagram makes it pretty obvious
I actually had a misconception that the Circuit Open Relay contained a discrete RC + BJT circuit that performed a prime when you first activated ignition. But this is definitely not the case - it's two coils on a common core, RC snubber i guess to prevent arcing on the AFM contacts.
The contacts on my COR were pretty crusty - I'm just going to replace it with a standard 20A SPST.
This shows a superset combination of MX5 + Speeduino + Origional AFM - obviously if you read the instructions your not supposed to have the AFM connected at the same time as the speeduino.
This shows ST SIGN fuse fitted - you want to remove this when the Speeduino is fitted, the wiring diagram makes it pretty obvious
- By purplelightning