Differences

This shows you the differences between two versions of the page.

--- blog:escort:work:fuelling_reset [2024/08/08 17:50] – john
+++ blog:escort:work:fuelling_reset [2024/08/08 17:51] (current) – [Part 1 - AFR Gauge Install] john
@@ Line 40: / Line 40: @@
 === Outcome ===
-After installing the AFR gauge we tried to set a reasonable idle speed (around 1100rpm is the best we can achieve with the ISCV unplugged) and then proceeded to let the car warm up and then adjust the ECU fuel trim screw.
+After installing the AFR gauge we tried to set a reasonable idle speed (around 1100-1200rpm is the best we can achieve with the ISCV unplugged, otherwise you need to tickle the throttle constantly when starting the car from cold) and then proceeded to let the car warm up and then adjust the ECU fuel trim screw.
-The car was running at an AFR of ~11.5:1, corresponding to a CO of around 8%, which is way, way too rich, and I then backed off the fuel trim screw slowly leaning the mixture out until it approached around 13.0:1 (which is still quite rich, around 4% CO; at least 1.5 points above where it should be), at that point the engine wanted to die and we had to wind back more fuel on to stabilise things.
+The car was initially running at an AFR of ~11.5:1, corresponding to a CO of around 8%, which is way, way too rich, and I then backed off the fuel trim screw slowly leaning the mixture out until it approached around 13.0:1 (which is still quite rich, around 4% CO; at least 1.5 points above where it should be), at that point the engine wanted to die and we had to wind back more fuel on to stabilise things.
 It became really difficult to try and set the base fuel level as the car got hot and the fans came on - since the ISCV valve didn't function correctly.