Dezod AEM V2 Wasted Spark to COP - Page 5 - Lexus IS Forum
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post #61 of 126 (permalink) Old 07-17-2014, 02:08 PM
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Other question on this, with the IS300 cam sensor it gives 3 pulse for every cycle (720 degres). So right now it's running in wasted spark even if I'm running 6 separate wires to the AEM.
It's impossible to charge the coils correctly at high RPM. Is there a way I can convert to full sequential ignition in the AEM?
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post #62 of 126 (permalink) Old 07-17-2014, 02:17 PM Thread Starter
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Quote:
Originally Posted by Max 1.6 View Post
Other question on this, with the IS300 cam sensor it gives 3 pulse for every cycle (720 degres). So right now it's running in wasted spark even if I'm running 6 separate wires to the AEM.
It's impossible to charge the coils correctly at high RPM. Is there a way I can convert to full sequential ignition in the AEM?
So you're running the same phasing regardless of having 6 coils?
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post #63 of 126 (permalink) Old 07-17-2014, 02:34 PM
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No, phasing is as follow:
Coil 1 - Ph 12
Coil 2 - Ph 4
Coil 3 - Ph 20
Coil 4 - Ph 8
Coil 5 - Ph 16
Coil 6 - Ph 0

But I can't output a powerful spark over 5k rpm.
I went to dyno yesterday and made 525whp but plug gap is 0.020
I was running 0.024 at first with a lot of misfire and couldn't make more spark even when adjusting dwell.
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post #64 of 126 (permalink) Old 07-17-2014, 02:38 PM Thread Starter
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Quote:
Originally Posted by Max 1.6 View Post
No, phasing is as follow:
Coil 1 - Ph 12
Coil 2 - Ph 4
Coil 3 - Ph 20
Coil 4 - Ph 8
Coil 5 - Ph 16
Coil 6 - Ph 0

But I can't output a powerful spark over 5k rpm.
I went to dyno yesterday and made 525whp but plug gap is 0.020
I was running 0.024 at first with a lot of misfire and couldn't make more spark even when adjusting dwell.
So you're running a sequential ignition. How much boost are you running? My guess is around 20 PSI? Also what heat range plug? Octane?
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post #65 of 126 (permalink) Old 07-17-2014, 03:00 PM
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22psi
BKR7E
94 octane
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post #66 of 126 (permalink) Old 07-17-2014, 03:04 PM Thread Starter
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Originally Posted by Max 1.6 View Post
22psi
BKR7E
94 octane
Just as I suspected. Your problem in lies a lot of issues in controlling detonaiton.

First, off, you are only 1 step colder on plug range from factory. You should be 2-3 steps colder for that boost and power range. So a BKR8 or BKR9 plug would be more ideal.

Secondly, I am surprised you even got as far as you did on pump 94 octane. Now it's time get a higher octane fuel in the mix and/or a more efficient turbo and intercooler.

As cylinder pressure (boost) rises, it becomes increasingly harder to ignite the intense pressure in the cylinders. I THINK the coils you have should ignite the mixture without a hitch and not provide an incomplete combustion or any real other ignition related common issues as the GM coils are pretty damned good. Switching to a high octane fuel and colder plug with similar gap will prove the theory 100%.
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post #67 of 126 (permalink) Old 09-19-2014, 05:23 AM
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Im having the same problem as max 1.6

Just installed lq9 coils ..cut t1,t2 and t3 from the ignitor and connected them to coil one,2 and 3

Ran 3 wires from the aem for 4,7,8 and selected the right dwell

Car runs fine n idle way better but misfires badly over 5k rpm..

I have connected both ground of the coil to the head, does that make a difference?

Running a different phasing than dezods
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post #68 of 126 (permalink) Old 09-19-2014, 05:25 AM
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Running ngk iridium 8s gapped super low at 0.020
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post #69 of 126 (permalink) Old 09-19-2014, 05:28 AM Thread Starter
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Running ngk iridium 8s gapped super low at 0.020
Let me guess, mojo harness?
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post #70 of 126 (permalink) Old 09-19-2014, 05:41 AM
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No, i have done the wiring myself, this is on a 2jz vvti obviously and your aem2 kit
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post #71 of 126 (permalink) Old 09-19-2014, 05:43 AM
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I tried your phasing and the car wouldn't start and backfire

I ran a phasing of
Coil1 0.00
Coil2 16
Coil3 8
Coil4 20
Coil5 4
Coil6 12

For a 1-5-3-6-2-4 firing order
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post #72 of 126 (permalink) Old 09-19-2014, 05:48 AM
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What gauge wiring are you all using to power these?

Did you sync timing after installing them? After syncing timing, did you check for timing drift at higher rpm?
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post #73 of 126 (permalink) Old 09-19-2014, 05:50 AM
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For the record, I just now changed to heat range 8 plugs and gapped .030.

With these coils, I was at 30 psi, heat range 7 and .035 gap without issue. E85
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post #74 of 126 (permalink) Old 09-19-2014, 05:56 AM Thread Starter
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Quote:
Originally Posted by mitsuguy View Post
What gauge wiring are you all using to power these?

Did you sync timing after installing them? After syncing timing, did you check for timing drift at higher rpm?
Yes, yes and yes. Mitsuguy has some excellent points.
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post #75 of 126 (permalink) Old 09-19-2014, 06:12 AM
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I cut some wires from an oem evo7s wiring harness..so it should be okay

i didnt sync the timing yet..but that shouldnt make it misfire the way it does...

i have connected both coil grounds to the head..does that make difference or should i delete ecu ground from the lq9 coil?
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