Right, lunchtime today - running like a dog, backfiring, popping, banging, the works.
Unplugged MAF - no difference - plugged back in again - no difference.
Noticed a VERY strong smell of rotten eggs/sulphur etc, so after killing the engine and walking away for 5 mins, came back and had a poke around the engine. Seems one of the rubber pipes that plugs into the Airbox -> Turbo pipe, right at the base of it, had a big split up it. We did trin half inch off this last night where it had split, but its obviously too far perished now. Did a temp repair with some electrical tape which seems like it should hold for a few days min.
After unplugging the MAF again with the engine running, she idled a little smoother. Revs seemed to free up as I unplugged it with a surge to about 1400 and then dropping to 1000 ish. Drove back to work with MAF unplugged, seemed to run better.
Getting a bottle of MAF Cleaner on the way home, see if its just a dirty MAF.
Had the codes of P1133 (02 sensor) and P1171 (rotor fault - but i believe this translates to MAF in Volvo Codes.
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