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P0303 Misfire with Hondata TC Activation?
Posted: Sat Jan 07, 2023 12:44 pm
by Haltamer
Did a quick WOT on some known slippery pavement and popped a P0303, Coils & plugs were serviced not so long ago - Just wondering if it's possible that the TC Activation may have triggered the code?
Re: P0303 Misfire with Hondata TC Activation?
Posted: Mon Jan 09, 2023 10:13 am
by Spunkster
Post the calibration and a datalog showing the issue.
Re: P0303 Misfire with Hondata TC Activation?
Posted: Tue Jan 10, 2023 8:58 pm
by Haltamer
I had a hunch; Turns out there was standing water (!!!) the depth of the spark plug in Cyl 2 & 3 - Novel, as it hasn't been washed / engine bay washed etc, silicone on the spark seals etc.
(Definitely rain water as well, I had a little taste after pumping it out :D )
Pumped it out, dried the coils and plugs.
I've grabbed a datalog for entertainment value after I test drove it tonight; Still misfiring so I've ordered some new coils - The plugs look clean still, So I'll have them out when I swap and see if they are salvagable with a clean up.
No knock retard on the datalogs, and it doesn't look too lean either which is interesting, just sits with Tplate 99% and no commensurate gain in speed.