richwill
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| posted on 26/5/08 at 03:14 PM |
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pinto wiring problem
i have wired the efi pinto this week and have a problem.
When the key is turned and the engine is cranking i dont get any spark at the leads but just as i let go of the key to stop cranking the engine i get
a spark.What is the problem can anyone help?
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big_wasa
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| posted on 26/5/08 at 03:26 PM |
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Have you connected the ecu/coil feed to the acc position(yellow wire) on the key switch ?
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richwill
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| posted on 26/5/08 at 03:47 PM |
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No i have nothing connected to the yellow wire all the wires have been connected at the ignition switch as per the build manual instructions.
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yamapinto
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| posted on 26/5/08 at 05:01 PM |
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Is there any other function you can test that the ECU is getting the correct signal to trigger the coil pack, is there a rev-counter for example that
would be fed from the same signal.
The ECU probably grounds its outputs to dischage them when its is shut off, hence why it gets a spark when you've finished cranking.
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rusty nuts
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| posted on 26/5/08 at 05:13 PM |
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Could be a faulty ignition switch not putting out any power to the ignition circuit when cranking. Easy to test with a multimeter.
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richwill
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| posted on 26/5/08 at 05:29 PM |
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ignition switch is working and power gets to the coil. i can ground the coil to produce a spark but it will not spark when the engine is cranked. i
have tried with two other dizzy's and tfi amp packs but had no joy.
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The Baron
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| posted on 26/5/08 at 06:08 PM |
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Hopfully, here is alink to the wiring diagram that i used to get my pinto to run.
I had the same problem, it would fire, then stop when you released the ignition.
Linky
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Macbeast
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| posted on 26/5/08 at 11:04 PM |
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As far as I can see from the manual, the ignition module needs two +ve feeds:
Black/green - from the cranking feed - joined to Blue/black on the ignition switch
Black - switched ignition feed - joined to black yellow on the ignition switch.
So the black/green will get +12V when you are operating the starter
and the black will get + 12V both when operating starter and when running.
I don't know why it needs two feeds - maybe it was designed for a system (apparently not used on the Sierra)where all the ignition controlled
feeds are cut while cranking to give max power to the starter:
maybe the presence of +12V on both wires tells ignition amplifier to retard the spark or speed up the decay to give a stronger spark when cranking.
In any case, you need +12V on the black wire when it is running.
I'm going to connect it as per Sierra manual
HTH
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richwill
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| posted on 28/5/08 at 12:24 PM |
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i think i have sorted it. i found a break in the signal wire between amp pack and dizzy.
Fingers crossed that i fire it up tonight.
Thanks for all the suggestions.
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