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v6 idle emissions probs

573 views 16 replies 5 participants last post by  Mr M3 
#1 ·
hi there i have just taken my v6 vectra for an mot it has failed on emissions at idle and co at idle please can anybody help me many thanks michael
 
#14 ·
novacav said:
engine oil temp was 80 they put a probe in dipstick

when i took it last week the coilpack gave up on the way there so was missing a bit it passed on idle then but failed on the faster test
HC's would have been sky high if it was missing, as the CO was high, this would show up on test (as cat is not working).
 
#17 ·
novacav said:
yes the hc last time were 832 but this time fine at 66
If they had it hot enough it's new cat time. Saying that, mine was on fast idle til the final knockings way too high, then dropped like a stone. Don't know if its a tired cat or what, but some need to be really hot to pass.

Rhyd, I always found it best, and so did awesome mobile mechanic mate.
 
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