>         As for the ignition, it is doing fine, now that I figured out
    >     what was
    >         causing my misfiring condition at high rpm (6500 & up).
    >
    > snips.......................
    >
    >         Other than that, it flies great!
    >
    >         Mark S.
    >
    >  snips....
    >
    >
    >         Mark,
    >
    >         Sorry, I must have missed the info on your ignition
   problem.  What
    >         was the cause and solution to your high speed missing
   condition.
    >
    >         thanks, Joel
    >
    >
    >
    > Joel,
    > A little history on my ignition problem.  Originally, it was
   using the
    > old style CAS, the one that resembles a distributor.  I had the
   idea of
    > changing over to the new Renesis style (fewer moving parts, 2 lbs
    > lighter).  So, I purchased the necessary parts and did the
   conversion.
    > I had to send the EC-2 back for upgrades anyway, so it seemed like a
    > good time to have Tracy change it over.  The mods included the
   snubber
    > upgrade to solve the injector dribble problem.
    >
    > Well, when I got it back, it ran beautifully in the lower rpm
   range, but
    > wouldn't run in the upper ranges.  We ended up installing a zener
   diode
    > circuit and played around with resistor values until we got it
   running
    > much better.  This is what another Renesis builder did and it
   fixed his
    > problem.  Anyway, I thought we had it handled, until I started doing
    > fast taxis and I got into the 7000+ rpm range.  The misfire was
   back.
    > Many phone calls to Tracy, and after trying many, many things,
   none of
    > which helped, I was ready to change it back to the old CAS.
    >
    > The last thing on my list of things to try was the CAS
   bracket.  Why the
    > bracket?  Well, I remembered reading in the Renesis manual on CAS
    > information and they mentioned to beware of metal filings/powder
   on the
    > CAS.  I got to thinking that if it was that sensitive, maybe my 4130
    > bracket might be causing the problem.  So, I fabbed up a bracket
   out of
    > aluminum and tried it.  Would you believe it, that was the
   problem.  It
    > runs great now and I couldn't be happier.  So, if you decide to
   convert
    > to the Reneisis CAS, make the bracket out of aluminum, not steel.
    >
    > So, now you know "the rest of the story".
    >
    > snips... info later
    >
    > Thanks,
    > Mark
    >
    > Thanks Mark on the CAS steel bracket bit. Amazing. Who would have
   thunk?
    > :)
    >
    > Paul Lamar ...No rotor no motor.

   Mark I am suffering a similar problem. No ignition on an RX8 with
   the the
   standard CAS and RWS system. Would you please explain in laymens
   terms about
   the Zenior diode and resistor, actual values and a diagram would
   help. What
   is the internal resistance of your CAS? What is the output voltage
   of your
   CAS at cranking speed? As  you know my CAS bracket is aluminum of
   course, it
   came with the engine. No filings on the CAS sensor, cranking voltage not
   less than 12V, battery ground lead does not pass even close to the
   CAS, etc.
   Who was the other Renises builder and his e-mail address please?
   Thanks, Milo

   Where do you live Milo? Perhaps we can find somebody with a scope to
   help you
   out.

   Paul Lamar



Milo,
According to Tracy, the zener circuit is now built into the EC-2, so I
doubt that is the problem.  Besides, it only addressed the issue of
overdriving the trigger circuit at higher rpm.  Have you checked your
wiring to make sure that everything is wired correctly?  Have you
verified that the CAS is not wired backwards (I made that mistake
initially).  Have you checked the CAS signal with a oscilloscope (you
may have a bad CAS)?  Have you verified that the CAS connector is making
connection with the CAS pins?   What is your gap between the trigger
wheel and the CAS?  The gap on my CAS is .020".  Too big a gap will
prevent it from starting (don't ask).  Do you have 12v to the coils?
Have you tested the injectors and coils in the simulation mode?  Are all
of the ground leads connected to the EC-2 and to ground (Yes, I made
that mistake once too)?  Is the d-sub connector making good
connection... any bent pins?   Do you have fuel pressure to the
injectors?  Finally, have you spoken with Tracy (he's back from
Colorado)?  I would make a list, verify everything on the list, then if
it still doesn't start, call Tracy.

There has to be a reason why it won't start.  You just need to find the
needle in the haystack.

Mark S.



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