Hi, I am stuck on this one.
The W639 Vito only fires on 2,3&4.
The injectors have been removed and tested. With a lot of time an patience I removed the glow plugs from 1 and 2 and the compressions are 300psi / 20 Bar on both.
no engine light, no fault codes with icarsoft 1.0
With injector 1 connected it does not fire but produces white smoke (- un-burnt fuel?,) disconnected it is clean.
So I swapped injectors and the fault stays on cylinder 1. I think this proves that fuel is getting into the cylinder and its not the injector.
So with good compression and fuel why wont it fire? Valve timing? is it possible for one cylinder to have different valve timing to another??
Could it be ECU injector timing? - I would have thought if its OK on 3 of the cylinders the chances are all 4 would work.
Is there anything that could affect cylinder 1 in isolation? inlet path? EGR? (On one old car the brake vacuum pipe connected from one cylinder, that caused a lot of head scratching when the servo leaked!)
Can anyone help me from going in circles?
The W639 Vito only fires on 2,3&4.
The injectors have been removed and tested. With a lot of time an patience I removed the glow plugs from 1 and 2 and the compressions are 300psi / 20 Bar on both.
no engine light, no fault codes with icarsoft 1.0
With injector 1 connected it does not fire but produces white smoke (- un-burnt fuel?,) disconnected it is clean.
So I swapped injectors and the fault stays on cylinder 1. I think this proves that fuel is getting into the cylinder and its not the injector.
So with good compression and fuel why wont it fire? Valve timing? is it possible for one cylinder to have different valve timing to another??
Could it be ECU injector timing? - I would have thought if its OK on 3 of the cylinders the chances are all 4 would work.
Is there anything that could affect cylinder 1 in isolation? inlet path? EGR? (On one old car the brake vacuum pipe connected from one cylinder, that caused a lot of head scratching when the servo leaked!)
Can anyone help me from going in circles?