Just an update...when we were first talking about the burned
coils, and I mentioned that I had replaced mine, I also added
that the check engine light had come on about a month before
that, and, on checking it with my Harbor Freight OBDII reader,
it was indicating the O2 sensor was bad.

Another check last week also indicated that now the SSV
(secondary shutter valve) was stuck open as well...an online
check indicated that that is usually caused by carbon buildup
and
may need cleaning once in awhile (not easy to get to, but doable
at home).

Further searching provided a possible solution for both
problems,
by just running around at high RPM for awhile to burn off the
carbon. So, two days ago, I ran around town in 2nd gear all day
(6k-7k rpm) and then reset the codes when I got home.

Since then (two days now) they haven't returned.

So it looks like the two bad trailing coils that I found on my
car were the cause of buildup on my O2 sensor which was burned
off once I replaced the coils. I'd guess that running the engine
hot a couple of days ago probably cleaned it and loosened up
the SSV.

Harley

Hmm Harley, possibly wouldn't have happened on good 2 stroke
oil :(

John Evans


I thought of that as well, John, but I don't think so...been
using the same 2-stroke oil for 8 years now (it's one of those
Paul has mentioned in previous messages) and I haven't heard of
anyone else having the same symptoms.  If a dozen of us
"2-strokers" all reported the same thing, I'd be suspicious.

In some of the RX8 forums, I've also seen several other
complaints about the SSV sticking open (and sometimes closed) by
those who have never used 2 stroke oil.  It's become such a
problem that there is even a video now on how to remove and clean
it!

As far as the O2 sensor, I had just replaced that last July...had
been fine up until the two coils burned out...and is fine again a
short time after I replaced those coils.

Harley