Problems with ignition firing

[tommyboyblitz]

I have set up the ecu master on my 1jz gte vvti and tried starting it for the first time this morning.

I was checking the spark plugs and i was only getting firing on 2 of them (wasted spark). I checked the wires and connections and everything is wired up correctly to the emu, except when i check ignition #1 and #3 i dont get any signal/pulse to fire the ignition coil, i am only getting firing on #2 which seems to work fine and is in sequence.

I have tried multi methods of ignition sequences etc and still only can get #2 to fire. i have swapped coil packs over etc and tried multiple different setups but none of the other 2 igniter signals will fire from the emu???

I also tried #4 #5 and #6 with no results either?

This has really got me stumped, as far as i can work out its the emu that isn't setup correct or maybe somethings not working correctly, all the wiring i have tested and tested again, and even rewired it all with fresh cables etc to try and find the problem.

I am hoping its something simple. but can anyone help?


Cheers

[SUKHOI]

Hi, are you using the stock ignition module or wired the coils to be directly controlled from the EMU?

Edit: plus do you scope looks normal?

[tommyboyblitz]

Thanks for the reply, they are wired directly to the emu.

Also the scope does look normal... as far as i can tell anyway I will save it and post it on here a little later to check.

Cheers

[tommyboyblitz]

Here's a scope from this morning on cranking

[RHD]

you really need to throw up your tune as well so we can have a look at your settings etc

[tommyboyblitz]

ok sure thing... this is how it is now, i have tried various orders and settings for the ignition events. I got the base map file from here for the 1jz non vvti and just adapted it for vvti.

Is there anything else you need?

[tommyboyblitz]

base settings etc

[SUKHOI]

Hmmm, are you sure of your sensors polarity, am just comparing your scope to a scope of mine for the same engine, and mine looks more uniform, here I attached a photo for it below, you can compare both, try to change the trigger edge for the crank sensor it might help, plus am using 12999 in sensitivity switch RPM in secondry trigger settings, worth the try , Good luck

[SUKHOI]

By the way make sure to strobe your engine with timing light, cuz I have different value for that, so make sure to use the timing light

[tommyboyblitz]

Ok i will check later, i thought it was less uniform as im just cranking over on the starter?

By the way the engine isnt running so i cant use the strobe light?

Cheers

[tommyboyblitz]

Also it is possible that the sensors are wired up wrong as someone else done the loom for a supra and i have adapted it again for my is200. I pulled the loom off yesterday and found that there were some sensors wired in wrong places and neither knock sensors were connected either. I will check polarities on the cam and crank sensor. I also tried rising or falling and didnt seem to change anything.

My thoughts are that if the emu is firing on coil #2 how come uts not firing on #1 or #3? Even if timing is wrong or out shouldnt all 3 fire?

Cheers

[RHD]

sounds like you might have a power supply problem with the other coils??

have you tried physically changing the connections to use different driver OPs from the EMU? make sure coils are actually wired to OP's 1 2&3, try switching the wires over and using 3&4

[tommyboyblitz]

I was thinking about that, I i did try 3 4 and 5 with no change.

At the moment i have pulled the loom out a redone most of it and tidied up cables, the crank and cam sensor wiring is correct from what i can see. But i i have noticed someone has wired in a resistor inbetween the signal output and ground for both sensors.. is this normal?

I have pulled all of my plugs and have 2 fully charged batteries on the car and turns over better and i am getting a better scope output.

There has been an improvement on spark, i am still getting spark from ignition coil 1 which is constant but now coil 3 is sparking but seems to miss now and again, still nothing from #2???

How should i have the constant 12v wired up for the coils? at the moment there wired into the is200 loom, should i wire them into a seperate relay?

[tommyboyblitz]

on further investigation, i have determined all of the wiring is correct, its seems to be the emu that isnt putting out a signal on ignition coil #2 G16, or Coil #5 B8 I have also tried #6 G1 and #4 G16 and have tried different wires each time with same result #1 and #3 output a signal 2 4 5 6 dont.

Also signal from #1 and #3 seem to be good and consistent now.

All earths are connected and i have doubled up earths connections from battery to car and to engine.

From what i can gather there could be a problem with the software or the emu itself?

[RHD]

I like using a separate relay straight from the battery junction if you can, you want the best spark possible, you can activate the relay off the fuel pump relay works well then you only have power to the coils when the engine is turning.

The IG OPs can get damaged, we fried one once with incorrect wiring and settings but lucky we also were using wast spark and had spare ones to use.

Try updating the firmware or downgrading to an early version and back again, and double check your not using old or fowled plugs!


edit: i would remove the resistors on the cam and crank sensors and try reversing the edge3 on the crank trigger it looks from the scope to be wrong, since the first gap after the missing tooth is slightly larger than the others!!

[tommyboyblitz]

Thanks, you to be honest i think this one might be fried. Was there any repair on it?

Ive tested plugs and coils etc and they all work fine, well except one coil but i have ordered a new one, the problem is on the signal pulse from the op on the emu, i am testing it directly from the emu to see if i am getting a signal using an arduino set up to test all the out puts (3 at a time) and i am only getting outputs from 1 and 3, there others dont produce a signal in any situation or combination etc.

I will try the firmware thing.

Also was there any visual damage the the emu board with the bad ops?

Thanks for all your help by the way

ps.. no change with changing + updating firmware

[tommyboyblitz]

Resistors removed, how does it looks?

Also rising cranks makes it really bad so put it back... see attached

[tommyboyblitz]

Falling Crank without resistors.. Better?

edit- no change on ignition outputs, what the cheapest place to buy another emu?

[gregpe]

hi
second look lot better so this is correct setup.
resistors often help with noise from sensors so is good to check if in your car they help ..

[gregpe]

also first scope with resistor is ok..