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When I was troubleshooting why the 13B
in my RV-3B would not start, I actually removed the injectors and
fuel rails from the engine and (with fuel pump running) saw a fine
mist from each injector in injector test mode.
However, that is not the case here
because we know all the injectors work with the B controller, so
we're just trying to see if primary injector drivers in the A
controller have gone bad.
But I agree that it's more likely that
MAP table in controller A has been corrupted. That would be
checked by swapping A and B chips. If it now runs, it would be
easy to copy A to B and be all done. I do understand any
reluctance to removing and reinstalling chips, but should be safe
with careful work and static electricity protection (by testing so
far we know that the power supply for controller A is working OK
or ignition and injector test modes wouldn't have worked.)
Finn
Use an
injector node tester for each injector elect. test, will not
tell if mechanical release of fuel only elect. from
controller.
Sorry for the multiple posts. Not
quite with it today.
Here's another idea. We now know
the injectors are working -- but all four?
If only secondary injectors work
then engine will die.
Not sure how easy it is for you to
get to injector connections, but you try to disconnect all but
one at a time (in test mode) to make sure each of the four
actually work.
Finn
Finn: Thanks so much
for these additional steps to try!
Looks like we can
rule out “0, 3, 4” (?) since the injectors click away and
the leading and trailing plugs fire up nicely?
Can’t we also rule
out “1” (Injector drivers) since the injectors operated
nicely in Mode 0 when “priming”?
Also, does this rule
out a possible CAS issue…maybe the CAS circuit is somehow
used in firing the plugs at “3,000 rpm” in mode 8?
Doug
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Would
be interesting to know which part of the A
controller failed.
0) 5V power regulator
1) Injector drivers
2) Ignition coil drivers
3) Crank angle sensor input.
4) MCU itself.
Do the injectors click when you press the Store
button or when you put it into injector test
mode?
Do the spark plugs fire when you put it into
test mode?
If either of those work we can rule out 0, 3 and
4.
As for compatibility, the main difference
between 13B and Renesis is the crank angle
sensor output. The 13B has magnetic pickups and
the Renesis has a timing wheel, so you can't
switch them without reprogramming.
Then there is dwell time -- depends on iginition
coils you use.
I suspect that other differences can be handled
by tuning.
Finn
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My Renesis “A” processor went INOP a few weeks
ago, and I’ve done the following: a). Verified 12 V
to BOTH EC2 power pins. b). Verified continuity from
OAT two wire thermistor to EC2. c). Replaced
thermister with the one on my 9A project. d). Opened
the EC2 to ensure the micro processor was still seated
in its’ socket.
The “A” side is still not functioning, and must be
started on the “B” side, and when switched to “A”, it
immediately dies.
Are there any other trouble-shooting steps I should
try?
Thx. Doug
P.S. I believe Tracy did some special EC2 processing
on Renesis EC 2s, vs RX-7 13B? I think I have two
extra EC2s, so could swap them out IF they are
compatible with each other…
Thx for your inputs, Doug
Sent from my iPhone
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