My car has been running excellent on the exact same setup and hondata tune for the past few months. Recently is has started to miss and stumble pretty bad under light load but immediately smooths out under boost. However I'm not getting any misfire codes.

My part throttle tune is very rich (just got a rom burner and wideband is on the way to fix that) and I just recently changed my plugs, but I gapped them the same as always (.32). Would a tighter gap possibly help the problem?

 

Gapp um at .30 and then .28 and see what happens
What are you running as far as ignition goes? Stock igniter? If so Have you changed it recently?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by si2die4 &raquo;</TD></TR><TR><TD CLASS="quote">Gapp um at .30 and then .28 and see what happens
What are you running as far as ignition goes? Stock igniter? If so Have you changed it recently?
</TD></TR></TABLE>

Yeah it' stock and no telling when it was last changed. That's probably something I should look into.

 

I would say its a tuning issue not spark related if it was to miss fire it would be under heavy load normally right up top. Because as it is you are running a fairly generous gap. Weather getting cooler.?

 

I may be having a similar issue...now that it has gotten cold.