Official LH2.4 EZK Wasted Spark Conversion - Installation Instructions

[dalek]

Originally Posted by crandandall

Some of the coils have an integrated noise filter/capacitor, the one I have uses an external filter so it can easily be removed if needed.

How do you identify them by staring at them?

[auditechjs]

I have unlimited supply of Audi A4 2.0T ign. coils with built in ignitors if anyone needs them for MS or 16v setups. i don't know if anyone needs them, but i have like, ****s loads of them. lol

[kodja]

hi, anybody have the partnr on the mazda ignitionmodule that will give out the tachometer signal and also work with the bosch 2x2 coil with the buckha card?

[DNAsEqUeNcE]

Hmmm let me go see. BEfore I go look, it's for a 1990-1997 mazda miatatatata

[Texas240]

Originally Posted by DNAsEqUeNcE

Hmmm let me go see. BEfore I go look, it's for a 1990-1997 mazda miatatatata

I guess I could go walk 20 feet to my car, pop the hood and look at mine

[kodja]

lol.... would be very nice. need to order the few parts i need for this thing :-)

[kodja]

nobody?

[DNAsEqUeNcE]

Hey look! there's one in my pocket.

It's a J702T mitsubishi. surprised I didn't remember that.

[boosted12a]

i used a mitsubishi 6 cyl ingniter and just didnt use one of the i/o channels. worked great

[kodja]

http://www.ebay.com/itm/90-91-97-Maz...item3f012aac80

so This is the exact ignition module to use if i am correct then?

[kodja]

if anybody else thinks this is usefull:


the J702T ignition module for Mazda MX5 \ Miata
Mazda Partnr: B61P18251
cost aprox: 4800 NOK (Norwegian Kr) in dollar aprox depending on the currency: 800$

[DNAsEqUeNcE]

Originally Posted by kodja

http://www.ebay.com/itm/90-91-97-Maz...item3f012aac80

so This is the exact ignition module to use if i am correct then?

that's it fella!

[Beachee]

the J702T ignition module for Mazda MX5

What do you connect the IGF to?

[Beachee]

Got it:
Originally Posted by DNAsEqUeNcE
OC1 Output coil bank 1 (to 1-4 side of your coils)
IB1 Ignition bank 1 (from buchka spark 1-4
VB Voltage Battery 12+ switched
TAC Tacho output straight to your 240 tach if miata unit, IF dsm unit, wire in a 12+ pullup wire with 1k ohm resistor tied into tach line)
IGR 12+ passthrough (unused)
GND Self explanitory
IB2 Ignition input 2 (to 2-3 side of your coils)
OC2 Output coil 2 (from buchka spark 1-4)

[DNAsEqUeNcE]

I have to edit that post that everyone keeps quoting, because OC2 and IB2 are switched

[DennisvdB]

You are right, when we wired everything in my car we initially did it wrong because we took your schedule. Turned out good anyways

[leon740]

Just installed the but no spark what readable signal should i get from the wasted spark board? 5v?

[Karl Buchka]

How have you wired it? What components are you using?

[leon740]

replaced the stock power stage with the J702T and a using a 'diamond' subaru coil.

[Karl Buchka]

Have you double checked the wiring inside the EZK? Are you getting a steady 5V across the power and ground pads on the spark board?

[leon740]

Yeah, I've got 5v across power & ground. Also getting a signal from the launch control

[Karl Buchka]

Originally Posted by leon740

Also getting a signal from the launch control

What do you mean by this?

Every board i send out is fully tested and I haven't had a single one be DOA. Is your coil and power stage confirmed working? Is that wiring properly done? There seems to be some confusion above regarding the J702T pinout.

[leon740]

I have 5v from one of the launch control connections. My wiring is correct, is it a 5v signal to the power stage when cranking the engine?
Don't know why I didn't think of it before, I swapped my aw71 with a w55 manual tranny at the same time as installing the wasted spark. Think I might have missed something there. I'll be back at the car tomorrow and will have another look.

[leon740]

Finally got around to having a good look, always learning! Sorry about my noobness
Is the wasted spark basically a "switch to ground"? Is there a way of confirming if it is operating correctly or if it's receiving the correct info from the EZK with out an oscilloscope?
Engine's cranking, fuel and suppression relays are fine and switching, fuel pump primes, replaced the J702T power stage with another one that was confirmed working, also tried a Subaru power stage, Coil is in working condition and I've checked the wiring at least 20 times and still no spark
I read somewhere that, with accessories on, the crank angle sensor is meant to have ground, 5v & 12v across the 3 wires. I have ground, 3.5v & 0v, could this be because I damaged the EZK when installing the wasted spark board or maybe a faulty CAS? Any way of testing without an oscilloscope?

[Karl Buchka]

The wasted spark board simply takes the stock coil trigger signal and diverts every other pulse to two outputs. It is grounded when nothing is happening. When it goes high, it triggers the power stage to start charging the coil. When it then goes low, the power stage turns off and the coil makes a spark.

"ground, 5v & 12v" across the crank angle sensor doesn't sound right. It should output a sinusoidal signal of increasing amplitude with increasing RPM.

You mentioned that you did a manual swap. Does that car have a neutral safety switch that you have to bypass?