Mark Steitle <
msteitle@gmail.com> wrote:
>Tracy,
>
>OUCH, that hurts! OK, here's the rest of the story. I've changed my
>intake manifold and changed injector sizes, so I'm back to the tuning
>phase. The B controller won't run right now as I haven't copied A to
>B yet. I'll have to do that before I can try the B controller.
>Thanks for reminding me that I typically do things the hard way.
>
>Mark
>
>On 3/21/12, Tracy <
rwstracy@gmail.com> wrote:
>> Trying the B controller should always be the FIRST thing to try since it is
>> the easiest. This needs to be ingrained in all EC2/3 users mental (or
>> preferably written) engine failure check list. Everything including the
>> coil & injector drivers are swapped out when selecting B controller. Based
>> on the number of time I have asked if the B controller was tried when called
>> about an engine anomally I have concluded that very few builders are even
>> aware it it there : ).
>>
>> Tracy
>>
>> Sent from my iPad
>>
>> On Mar 21, 2012, at 3:58 PM, Mark Steitle <
msteitle@gmail.com> wrote:
>>
>>> I have been chasing a problem with my p-port 3-rotor where the #1
>>> rotor cuts out at around 3800 rpm, but comes back at around 5000 rpm.
>>> When this happens, I can hear a change in the exhaust, and I see the
>>> EGT on #1 drop way down to around 500*, so that's how I determined
>>> that it was the #1 rotor. The other two rotors continue to run
>>> normally.
>>>
>>> I have tried swapping coils, replacing the #1 rotor's plugs & coil
>>> wires, and swapping injectors. I have not tried the B controller, but
>>> that sounds like what I should try next. My suspicion is there may be
>>> a defective coil driver circuit in the EC-2. I have borrowed another
>>> 20B EC-2 to try, but won't be able to do the swap until this coming
>>> weekend.
>>>
>>> Since things have been so quiet on the list, I thought I would post
>>> this strange problem and see what suggestions others may have.
>>>
>>> Mark S.
>>>