Dead miss on 1.6 Rover 45 ---- 4 cylinder EU3 --- wasted spark plug top coils, returnless fully sequential injection, no scharader valve, in-tank pressure regulator pulse damper on fuel rail. Misfire code for #3 cylinder, exhaust manifold colder on that cylinder.
Current ramped the coil sharded by cylinders 2 & 3 looked normal and good spark on no 2.
I swapped the shared coils over betwen 1&4 and 3&2 misfire didn't move, #3 spark plug looked okay.
Fuel injector not easy to access for current ramp so tried my Autoditex Firstlook sensor.
Connected to the pulse damper vacuum port and plugged off the manifold vacuum tube.
I used a low pass filter and had the upstream oxygen sensor disconnected to force open loop the result was clearer cut than I expected
Before injector change.
After Injector change.
[Last edited May 19, 2016 15:19:54]
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