Peter Mutlow
*stick it on a gas analyser the hc goes through the roof when the injectors play up*. HC is unburnt fuel and could also rise due to ignition or mechanical misfire.
I would expect to see high CO with an injector over-fuelling problem and low CO and low HC with an injector misfire. CO2 and O2 should not be disregarded when diagnosing a misfire. In the absence of fault codes, I would want to scope the injectors if a fuelling problem is suspected.
Regards
Pete M
Message Thread Audi A3 TSI 1.4 CMB Random misfire, codes P0300, P0301, P0303 & P130a # - Keith Brown March 20, 2017, 5:41 pm
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