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4agte
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September 2004
4agze no spark??? Tue, 21 June 2005 13:57 Go to next message
im helping a friend who has done a 4agze conversion into his n/a aw11. He used to have a 20v with a microtech (which he was now using in the conversion) to cut a long story short he shorted the battery somehow and fried everything electrical in the car. He asked me to come have a look for him as he was trying to wire up the old 4agze ecu to the injectors etc etc.

When i got there the loom looked like some of luigi's finest spaghetti and was strewn all over the engine bay.

The car had no spark and fuel as the fuel pump wasnt turning on.

After realising that he was going the hard way about it by trying to rewire the gze chassis loom to the n/a chassis loom we then used the n/a chassis loom and fuse box and got the fuel pump working.

Now there is no spark...

We tried this and that until i decided to see what error code the ecu would spit out.

it turned out 14 which i believe is the Ignition Signal

and from what ive read could be any of these 3 things

Igniter and ignition coil circuit
Igniter and ignition coil
ECU

We have tried replacing the coil with no success and im about to test the ignighter.

The ecu wasnt in the car at the time of the short but the wires seem to be going to all the right places and are all hooked up we have traced the wires from the ignighter to the ecu and all seems well there any help would be much appreciated

edit: fuses are fine aswell made sure to check that out first Very Happy

[Updated on: Tue, 21 June 2005 13:58]

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4agte
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Re: 4agze no spark??? Tue, 21 June 2005 22:04 Go to previous messageGo to next message
bump
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4agte
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Re: 4agze no spark??? Wed, 22 June 2005 02:30 Go to previous messageGo to next message
bump bump
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4agte
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Re: 4agze no spark??? Wed, 22 June 2005 06:24 Go to previous messageGo to next message
someone must have some idea
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4agte
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Re: 4agze no spark??? Wed, 22 June 2005 14:36 Go to previous messageGo to next message
bump
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mrshin
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Re: 4agze no spark??? Wed, 22 June 2005 15:25 Go to previous messageGo to next message
Well... is there a trigger signal coming to the ECU? Do the injectors operate? Does the ECU, the coil, ignitor, injectors, etc. all have power when they should? Time to get out a diagram and a mulletmeter, and go a-tracing.
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4agte
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Re: 4agze no spark??? Thu, 23 June 2005 02:26 Go to previous messageGo to next message
mrshin wrote on Thu, 23 June 2005 01:25

Well... is there a trigger signal coming to the ECU? Do the injectors operate? Does the ECU, the coil, ignitor, injectors, etc. all have power when they should? Time to get out a diagram and a mulletmeter, and go a-tracing.

hrrrmm i hate wiring diograms but thanx for the help sounds like its going to be a long day Laughing Laughing
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THE WITZL
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Re: 4agze no spark??? Thu, 23 June 2005 07:10 Go to previous messageGo to next message
The Witzl's tips:


  • Use a logical process of deduction and elimination to norrow down the scope of the problem.
  • Check the ignitor is a PROPER GZE item (if the GZE has the twin coil packs and CAS)
  • Check the ECU compatibility with Ignition system. Take off the top panel, and look at the labels of the ECU pins. If there is a pin labelled "IGd" then you have an ECU which is to be used with the twin coil packs + CAS.... if there is no IGd, then its a dissy ignition system.
  • YOU CAN use a standard dissy/coil/ignition combo from a 16V or early AFM dissy GZE.... you just dont wire up the IGd pin at all.
  • CHeck that EFI MAIN relay is working and giving power to the engine and ECU
  • Check there is POWER at the coil and ignitor. CHeck the Ignitor case is earthed.
  • Does the car have spark plugs? Are the leads ok?
  • is there actually an engine in the car, or just some big meatballs in Luigi's spaghetti?
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4agte
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Re: 4agze no spark??? Thu, 23 June 2005 07:22 Go to previous messageGo to next message
its all aw11 afm gze stuff as everything has been transplanted from a half cut so that narrows your list down consideranbly...

it has an engine and spark leads and would you beileve it spark plugs i know it has spark plugs as we used one of them and a lead to check for spark...

the leads were all replaced from another working car then tested with no luck...
and the ignighter was earthed but its worth having another check i guess.

i didnt see any meatballs but ill double check...

so that leaves the efi main relay and the ignighter case earth.

cheers witzl
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oldcorollas
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Re: 4agze no spark??? Thu, 23 June 2005 07:24 Go to previous messageGo to next message
methinks there should be a new thread..

"Teh Witzls Sticky Tips"
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oldcorollas
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Re: 4agze no spark??? Thu, 23 June 2005 07:27 Go to previous messageGo to next message
as witzl said, you need to narrow it down...
crank motor and test for AC voltage at the pickup (dizzy/CAS), then check for same at ECU, then check ECU output to igniter and go from there...
does help if you have a scope you can borrow tho... makes things much easier, rather than trying to read a slow multi..

good luck!
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4agte
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Re: 4agze no spark??? Thu, 23 June 2005 07:40 Go to previous messageGo to next message
cheers but no luck with the scope so it will be a multi meter unfortunatly.....
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oldcorollas
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Re: 4agze no spark??? Thu, 23 June 2005 07:48 Go to previous messageGo to next message
bugger.. got AC peak and hold function? voltage of CAS/dizzy when hand spinning can be in the tens of millivolts..
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4agte
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Re: 4agze no spark??? Thu, 23 June 2005 14:21 Go to previous message
yeah got a/c hold and peak functions
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