Cylinder 3 misfire

michaeljohnwelsh

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Wonder if anybody can help me...
Car generated a slight misfire a few weeks back, did a full service, change rocker seal as it was leaking.. temp sensor and thermostat..this didn't cure it but a few day later it cured itself..
Thought great but now come back with a vengeance...last time it misfired I had black smoke
This time I'm getting no power low down but white smoke all the time as if it's over fueling.. car is undrivable now without bellowing white smoke out.
Ran codes on vcds and misfire on cylinder 3... nothing else engine related has shown.
Replaced injector wiring loom as I heard it was a common fault but hasn't resolved the issue.
At a loss now what to look for or check/test.
Can anyone advise a possible solution or checks I can do please.
I've included all the measuring blocks on vcds that I thought may be useful to someone.

Thanks in advance.
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Coilpack failure on Cylinder 3 could be the reason for the misfire code. Try swapping it out to another cylinder & see if the misfire code goes with it.
MAF readings don't look quite right as well. MAF failure is common & doesn't always cause a fault code.
 
Sorry forgot to mention it's a 1.9 tdi pd130.

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Will look into the maf... would that cause a misfire tho..

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Ah just noticed it's an AVF engine. Not a coil pack then.

White smoke & misfire could be head gasket failure. I suggest you get a sniff test done to eliminate that possibility first.