Here is something I picked up off the emanage Yahoo group. This may explain 'why' coils are frying, but not why only some have had problems.


The e-manage takes the digital pulse from the ignition control of the
ECU, and allows you to adjust it for advance.
Standard e-manage output is a pulse the same width as it is fed from
the ECU ignition control output, and is roughly 5V amplitude.
One thing you have to watch out for is that it does not go all the
way down to 0V between pulses. he Greddy output only drops down to
about .3V
If you have coil packs ( MOSFET transistor triggering a coil) this can
cause the coilpack to be always "on" and
this will cause it to be continuosuly discharging current.
This will fry most coilpacks.
The cure is to insert a diode on the e-manage output, with a resistor
from it's output to ground. This will bring the voltage down to 0.
Unfortunately the value of the resistor required varies by car model.
To find out you need to hookup an automotive scope to the ignition
output of the stock trigger, measure the voltage, and by varying the
value of the reistor you can tune the Greddy out put voltage to match.
Doing this by trial and error is a bad idea, as it will likely
resultin a fried coilpack.
So start off with a circuit parallel to the real ignition, so you can
measure both.
Generally you will need a resistor in the value range of about 2K to
10K Ohms.
So, go find a friend with a decent scope meter or scope and check
first!

 

still clueless here chief. Wasn't the problem only caused by leaving the ignition on without the engine being running for long intervals?

 

Supposedly; this backs up that theory pretty well. If the emanage only drops to .3v in an 'off' state, and the MOSFET is triggered by that voltage to stay in an 'on' state, the coilpacks will be continuously discharging current and will likely cook themselves. Why my car for example seems to have no problem with the ignition being on with the engine off is still a mystery. Perhaps it has something to do with how the emanage is grounded? Dunno.

 

good info. someone should try and confirm this with Greddy.

 

Odd, I have done about 10 EVO's with the E-Manage and have yet to have any problems. I hooked up the ignition harness on all of them.

 

Were there any shortcuts, or other methods then what is specified in the directions? i.e. shorten length, solder, extension harness?

 

I used the extension harness and soldered all of them. Nothing different from the directions.

 

ive had mine burn

 

Mine is soldered, no extension harness, followed the directions to the letter.

 

bump

 

Well I just received the word from my local tuner that greddy has a fix for the evo coil frying problem. I am cautiously optimistic. Perhaps I will try and confirm this with greddy before I make an appointment to do more tuning.

 

let us know, bs....

 

smeone said it was happening to people with the outdated software. My e manage came with a supplemental disk that was required to set it up properly along with the cd.

 

I also installed mine with the extention harness and soldered all connections. No problems at all as of yet. Emanage has been on the car for a month and a half.

 

no problems here either