4age no spark

[repowered]

hey

yet another 4age conversion having trouble getting spark! ive read afew posts about this.

is for a 84' bluetop 4age into KE30

this is what i have done so far.

-checked Resistance of dizzy and results are 157,157, and 317 Ohms.
-checked error codes from ECU and flashes normal.
-1 of the ecu pins to ignitor has no signal, its like IGN or IGT cant remember.
when i got the motor it was missing the ignitor so i got a bluetop ignitor sent up.

got power to coil. a ex auto sparky from work wired it all up but has no more time to look at my problem.

I talked to auto electrican about it and he said there needs to be power to 1 of the wires to the dizzy (3 wire dizzy) and there isnt on any duno if thats true or not. i got bluetop ECU pin diagram which doesnt say any of the dizzy wires are powered, not 100% on that though.

any ideas? maybe faulty ecu? any other tests i can do on the dizzy?

[l1ttle_d3vil]

what type of plugs have you got on the loom for the coil/ignitor? and what type of plugs are on the ignitor? a couple of 2 pin plugs? or one 4 pin plug or what? had the exact same problem as you, same engine and same car too.

yes, there should be power on the dizzy wires, but it is all provided by the ECU so its not like you have to wire anything up to provide the power to that.

[matt dunn]

yes, there should be power on the dizzy wires, but it is all provided by the ECU so its not like you have to wire anything up to provide the power to that.

Are you sure,

I always thought that one wire was earthed inside the ECU, and the other two were the reluctor signals which are a sine wave?

Matt

[sergei]

The toyota dizzy works from change of magnetic field - like a generator - it creates its own signal which is detected by ecu, the signal is weak, and its power is increasing when RPMs are increasing, with good scope it is possible to detect it while cranking, even with ecu disconnected.

[l1ttle_d3vil]

Are you sure,

I always thought that one wire was earthed inside the ECU, and the other two were the reluctor signals which are a sine wave?

Matt

true, what I said was kinda misleading. you might be right, but what I meant was you don't actually need to physically connect any of these wires to a 12v ign source or anything for this sort of conversion, as all of the signals sent through these wires are controlled by the ECU (or dizzy to ECU). I can check out what signals are going down my dizzy wires if this needs to be confirmed though.

[matt dunn]

Do you have the coil and igniter assy securly mounted as the coil case needs to be earthed for it to work.

[repowered]

what type of plugs have you got on the loom for the coil/ignitor? and what type of plugs are on the ignitor? a couple of 2 pin plugs? or one 4 pin plug or what? had the exact same problem as you, same engine and same car too.

yes, there should be power on the dizzy wires, but it is all provided by the ECU so its not like you have to wire anything up to provide the power to that.

yea i was reading some of your posts about it. the ignitor has 1 big 4 pin plug.

[repowered]

The toyota dizzy works from change of magnetic field - like a generator - it creates its own signal which is detected by ecu, the signal is weak, and its power is increasing when RPMs are increasing, with good scope it is possible to detect it while cranking, even with ecu disconnected.

yea thats what the auto electician was saying. ive tested those resistances though so i presume there working.

[repowered]

Do you have the coil and igniter assy securly mounted as the coil case needs to be earthed for it to work.

yea its earthed. ive got coil on other side of engine bay bolted down.

[repowered]

Are you sure,

I always thought that one wire was earthed inside the ECU, and the other two were the reluctor signals which are a sine wave?

Matt

true, what I said was kinda misleading. you might be right, but what I meant was you don't actually need to physically connect any of these wires to a 12v ign source or anything for this sort of conversion, as all of the signals sent through these wires are controlled by the ECU (or dizzy to ECU). I can check out what signals are going down my dizzy wires if this needs to be confirmed though.

yea i get you. that will probably be the problem then, being no power to dizzy. i wonder if ecu is faulty. does the ecu rely on any inputs to determine power to the dizzy, is it power under igntion or cranking?

[l1ttle_d3vil]

send me some pics of your ignition / coil and the plugs around it, where which wires go waht etc.

matthew-lowe@xtra.co.nz

[repowered]

will do man tommorow oi

[slighty_sykotic]

yea i get you. that will probably be the problem then, being no power to dizzy. i wonder if ecu is faulty. does the ecu rely on any inputs to determine power to the dizzy, is it power under igntion or cranking?

They shouldnt be any power one those lines.

You will not pick it up with a test light/digital multimeter (within reason). Some expenisve anolog multi meters might pick it up.

You need a scope.

If you pull the ecu, the dizzy will still make those voltages.

Thats not your problem (no power on those lines).

Check if you have injector pluse (led in the injector plug).

If you do, then the dizzy signals are fine, and the fault is between the ecu, the ingitor, and the coil.

--Sykotic

[repowered]

yea i get you. that will probably be the problem then, being no power to dizzy. i wonder if ecu is faulty. does the ecu rely on any inputs to determine power to the dizzy, is it power under igntion or cranking?

They shouldnt be any power one those lines.

You will not pick it up with a test light/digital multimeter (within reason). Some expenisve anolog multi meters might pick it up.

You need a scope.

If you pull the ecu, the dizzy will still make those voltages.

Thats not your problem (no power on those lines).

Check if you have injector pluse (led in the injector plug).

If you do, then the dizzy signals are fine, and the fault is between the ecu, the ingitor, and the coil.

--Sykotic

ok man thanks for that aye! need a resistor or somthing on the led aye?

[slighty_sykotic]

Yeah, if you want your led to last a while. The led should last long enough if you don't have a resistor though.


But if you can, grab a 470ohm or close resistor.

--Sykotic

[repowered]

Yeah, if you want your led to last a while. The led should last long enough if you don't have a resistor though.


But if you can, grab a 470ohm or close resistor.

--Sykotic

yep ive got afew lying around i'll have to find out how to read those bands again.

i think the injectors are working anyway because after cranking you can smell fuel.

must be because that igniter wire isnt getting any power? im not sure if its one wires that has an unreadable singal from a multimeter. i'll find out what wire it is exactly.

taking pics today

[l1ttle_d3vil]

i think the injectors are working anyway because after cranking you can smell fuel.

must be because that igniter wire isnt getting any power? im not sure if its one wires that has an unreadable singal from a multimeter. i'll find out what wire it is exactly.

take one of your spark plugs out after its been turning over and just check to see if it is wet. if it is, then the injectors are definitely working OK.

once you let me know what wire it is without any signal i'll check my wiring and see what its supposed to be for you.

[repowered]

i think the injectors are working anyway because after cranking you can smell fuel.

must be because that igniter wire isnt getting any power? im not sure if its one wires that has an unreadable singal from a multimeter. i'll find out what wire it is exactly.

take one of your spark plugs out after its been turning over and just check to see if it is wet. if it is, then the injectors are definitely working OK.

once you let me know what wire it is without any signal i'll check my wiring and see what its supposed to be for you.

hey

yea i'll do that. pretty sure its got fuel. the wire to dizzy with no signal is:

Black/ yellow stripe from ECU and is pin IGF (ignition conformation signal)

edit: got some pics now as well. will post when home

[repowered]

[
once you let me know what wire it is without any signal i'll check my wiring and see what its supposed to be for you.

any luck with this man?

[repowered]

whats the role of the igf terminal on 4age ECU

on my diagram its 'igintion conformation signal', is this an input or and output?

not getting any reading out of it from multimeter in any state of igintion/cranking which im guessing is the cause of my problems.

going to try a new ECU, got one on the way that has extact same numbers as the one i currently have