On or off?

[Matt58]

Evening all, can anyone tell me if the secondary air injection shut off valves are meant to be shut on idle with warm engine? I was using my icarsoft to look at various values and numbers ( half of which I don’t fully understand yet) and noticed one valve is open and the other shut, I’ll do another test on cold start up when I get the chance. Anyone got any ideas? Thanks in advance, Matt.

 

[Matt58]

Evening all, can anyone tell me if the secondary air injection shut off valves are meant to be shut on idle with warm engine? I was using my icarsoft to look at various values and numbers ( half of which I don’t fully understand yet) and noticed one valve is open and the other shut, I’ll do another test on cold start up when I get the chance. Anyone got any ideas? Thanks in advance, Matt.

Sorry, car is E55 W211 2003, 100k.

 

[Matt58]

Sorry, car is E55 W211 2003, 100k.

Just a quick update, both valves off on cold start, one valve came on a free miles down the road, then both valves on when I was on the motorway, does anyone know if this is normal? Other than slightly lumpy idle when cold, she’s running great.