We were able to change
or reset some programmable values but when we started the
engine and tried to adjust anything the system was
uncontrollable! Bobby – with my encouragement - removed the
EC-2 circuit board and we visually inspected it – all looked
fine. The next day I removed the EC-2 (EPB?) engine program
board. I found the MODE selection micro switch has one
side of the switch unsealed. We than suspected the
switch may be at fault. Static testing of the switch with an
ohm meter showed it worked fine.
A picture of the failed
Mode switch:
Bobby graciously loaned
me his EC-2 EPB board to try .
I installed Bobby’s
EPB and the problem has never showed up again.
We reset all engine
parameters to factory settings and the engine ran OK. We
went through the normal routine of adjusting engine fuel flow
and I reentered my latest copy of the Mixture Control
Table. Now the engine is running fine and I have flown it.
I will be fine tuning the MCT some. During this process the
EC-2 programing worked perfectly.
We have received several
GREAT Emails concerning reprogramming the EC-2 computer chips
and we are working to get the equipment to copy the EC-2
software and than dump it into new EC-2 chips. Other great
info. sent to us included instructions on excessing and
reading the Hex Values of the engine operating settings – fuel
flow, timing, staging point etc. using the EM-2. This
allowed us to take pictures of the table – make changes – and
see the values changed.
After this experience, I
would like to find a replacement for my EPB. If I am
unsuccessful, I will try to replace all the mechanical
components – switches and veriable resistance pots. Not easy
for me to do! I also would be interested in getting a spare
LARGE BOX (6 ¼ INCH SQUARE BOX ) EC-2 that Tracy set up for
LS-1 and Mazda RX-8 coils as a spare. If someone has one of
these they will not be using I would be interested in
purchasing it as well as an EM-2.
I currently have access
to a large box 3 rotor EC-2 we may be able to reprogram and
convert to a 2 rotor model.
Dennis Haverlah
RV-7A
900 hrs on Renesis RX 8,
4 port engine
Tracy’s gear box RD1 –
C, EC – 2 and EM -2