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