clk 320 missfiring 456

[missjt]

clk intermiteantly missfiring cylinders 4,5 and6 and advice doesnt happen all the time sometimes car shakes a lot in drive aswell

 

[jibcl500]

You ned some diags run on the car to itentify the faults. Have you changed the MAF or air flow meter recently?

jib

 

[missjt]

You ned some diags run on the car to itentify the faults. Have you changed the MAF or air flow meter recently?

jib

yes we recently changed MAF installed a bosch one diagnostics threw up cylinder fault but nothing else

 

[5pares]

could be water in the fuel rail.

 

[jibcl500]

Coil packs
Leads
plugs

Or ECU.

jib

 

[Uncle Benz]

4,5 and 6 are all on the left hand bank. I would be suspecting the lambda sensor in the left hand down pipe as it is the only thing common to all those cylinders. Get that checked out first.

 

[German auto clinic]

If misfire only starts after driving quite hard and resets if you switch off and re-start the engine....... Then ecu reset bootstrapping and sensor rotor adaption will cure it. This will have happened as a result of changing the mass sensor. Its about 50/50 when you change a mass sensor... Half hour on the star tester will sort it

 

[Cole@MBS]

could be water in the fuel rail.

Thats more common than people think!! Rail comes to a dead end on that bank, At least on the other bank you can let the pressure go!