need help with igniters

[crazysupra2JZ]

my motor didn't come with an igniter, dealer wants $425 for a new one... but i have 2 7M igniters. i think it may be possible to use 2 of them to replace the 2jz igniter.

i've made a couple pics of the wiring details between the 2jz and 7M igniters.

i found the firing order of a 2jz

2jz and 7MGE are the same
1 - 5 - 3 - 6 - 2 - 4

but the 7MGTE fires in pairs. 1-4, 2-6, 3-5. i guess this is where the wasted spark comes into play.

so i have 2 igniters, the first one fires coils 1 - 5 - 3. the second one fires coils 6 - 2 - 4.

both ecu's have IGF in common. but the 2jz has IGT1 through IGT6. the 7M has IGT and IGDA and B

i assume IGT controls 1-4 (IG1), IGDA controls 2-6 (IG2), and IGDB controls 3-5 (IG3).

here's what i came up with

ECU Out / Igniter # / Input / Output / Coil / Firing Order

IGT1> igniter 1> IGT> IG1> coil 1 > 1
IGT2> igniter 2> IGDA> IG2> coil 2 > 5
IGT3> igniter 1> IGDB> IG3> coil 3 > 3
IGT4> igniter 2> IGDB> IG3> coil 4 > 6
IGT5> igniter 1> IGDA> IG2> coil 5 > 2
IGT6> igniter 2> IGT> IG1> coil 6 > 4

so here's what i plan to do: hopefully you can understand all the mess!

I really need some help. I kinda understand what i'm doing, but i have little experience.

 

[ma70mkiii]

really you dont necessarly have to use a 1jz/2jz ignitor. I bought one on ebay. I just looked up toyota ignitors and matched the part numbers i found from a reference page. There is one on there now. Its like $125. Its a bit pricey compared what i paid 4 mine but hey its cheaper than a dealer one.

 

[foreverpsycotic]

You can go through napa, its under 200 there and is in in 3 days.

 

[suprastanger507mgte]

An ignitor from a Camry also works. I think is the one from 1993 onwards...

 

[crazysupra2JZ]

An ignitor from a Camry also works. I think is the one from 1993 onwards...

that one is $330 from autozone.... i think i'm gonna give the 7M thing a try. if i can save some money i will. plus i was supposed to get one with the motor, it was in the pic. they said what you see is what you get, and i didn't get it. so i'll call them

 

[crazysupra2JZ]

can you get me a pic of the camry igniter. there is one on ebay really cheap. it's for 93 up. it looks like it has a plug on both sides of it.

 

[crazysupra2JZ]

ok, i think i figured it out

ecu has 3 signals for the igniter.
IGT, IGDA, IGDB

to fire, it sends signal IGT, then IGT+IGDA, then IGT+IGDB...... right?
so to fire IG1, IG2, IG3...

IG1 has been fired... which is IGDA (IGT+IGDA=IG1).... which fires cylinders ?
IG2 has been fired... which is IGT (IGT=IG2).... which fires cylinders ?
IG3 has been fired... which is IGDB (IGT+IGDB=IG3).... which fires cylinders ?

now i'm having some trouble here. how are the coils grouped together? i am seeing too many different grouping, i don't know which one it is.

TSRM says: IG1= coils 1-6, IG2= coils 2-5, IG3= coils 3-4
but i also saw this: 1-4, 2-6, 3-5 and 1-6, 2-3, 4-5

can someone please help me out here

also, are the fuel injectors grouped the same way or different from the coil packs?



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sorry for all the pics guys... i'm just tryin to get it right in my head, and so you guys can see my mind progressing...lol

but i don't know what IGF is used for. maybe it supplies +B it's signal... IDK

i figured out how the 7M igniter works.

now i can move on and figure out how to use 2x of them and get the right signal inputs from the 2JZ ECU

the 2jz sends only one signal to fire a coil and the 7M sends one signal to fire IG2 and 2 signals to fire the other 2 coils.

so what this means is, i would need 6 7M igniters to replace the 2JZ igniter, IG2 only needs one signal, which is IGT. the other 2 needs 2 signals to fire. so what i would have to do, in theory is have 6 igniters and have the 2jz ecu feed each of it's IGT signals to one igniter.


or i need 3x igniters. have IGT constant and only be able to use outputs IG1 and IG3, because IG2 would be a constant spark, which is bad.


on the 2jz... each coil is controlled separately, so is each fuel injector. but... does it send out 2 signals at a time. aren't 2 cylinders always together? so what i mean is, are the cylinders fired in pairs just like the 7M, but each just has it's own signal.



i have an idea.... this idea utilizes one igniter. if 2x signals are sent out from the 2jz ecu at a time: say it sends out 1-6, 2-5, 3-4

i can have signal 1, 2, 3 compined together into one wire. solder in a diode into each wire before they are all soldered together. that way signal flows one way and doesn't feed back into the other wires. then have signal 6 go to IGDA, that way IG1 and IG2 fires. then ecu sends out next signals. 2-5, have 5 go to IGDB, we now have IG1 and IG3 fire. then the last two signals are sent out, 3-4. have 4 go to IGDA, IG1 and IG2 fires. it's a lot of work and may overheat, unless i devise a way to rapidly cool the igniter.



i am going to make another pic right now, will post shortly

 

[crazysupra2JZ]

look ok??????
i'll put diodes in so signal only goes one way and not back into the ecu through other wires

this is all assuming cylinders are actually fired in pairs, receiving their own signal of course, but still 2 at a time


ok, i see a problekm with this. when it fires 1-6. it's actually going to fire 1-2-3-& 6. which is bad. i'm going

back to the drawing board

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OK, here... this looks better. this way, each output of the igniter goes to 2 coils.
IGT1>IGT, IGT6>IGDA, which causes only IG1 to fire 1,6
IGT2>IGT... IG5 goes no where. this way IG2 is activated which goes to coils 2,5
IGT3 splits and goes to IGT and IGDB, causing IG3 to be activated, firing coils 3,4

if the igniter see's 2 signals, it activates the appropiate IG(1 or 3)
if it only see's one signal, then it always fires IG2.

 

[tissimo]

sounds like a disaster when a jz ignitor is like $100.

 

[crazysupra2JZ]

sounds like a disaster when a jz ignitor is like $100.

a guy on SF offered his igniter for $100, but i can use that 100 bucks to buy a fuel pump, plus how freakin awesome would it be if this actually worked. i would feel so badass