Thread: Very Odd Problem With New Coils .

Originally Posted by AussieLandRover

Something about the ignition was mentioned at the auto electric but just won't know tell he can come around and have a look himself.

Were is the ignition amplifier located ?

on some v8's its mounted to the body of the dizzy, your model might be remote mounted, follow the wires from the dizzy it will bve a little black box.

cheers phil

Check the module on the side of the dizzy, not sure what it is called. I had a very similar problem, it cost me over 2k to have a mechanic replace half the car then conceed defeat. After talking to a friend (a heavy diesel mechanic) he walked through the basicis of the electrics with me over a beer as we tried to identify the problem, after a lot of yes no replaced, check ok etc we got to the module - bought a new one for about $150-00 everything ok.

It may not be this but I would definately have it checked. it hangs off the side of the dizzy

Blythe

Originally Posted by AussieLandRover

Something about the ignition was mentioned at the auto electric but just won't know tell he can come around and have a look himself.

Were is the ignition amplifier located ?

You have the amp on the side of the Dizzy .....

This is the photo you took of the new dizzy you installed ....


The Amplifier is that black thing hanging off it ^^^^^^


that you put this plug into it .....




You installed the new coil .....

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and still have your Dramas .....



Measure your battery volts ....
Now measure the positive feed power wire at the coil .... if it is less than 1 volt than the battery ... then you have a voltage feed issue

A quick way to test and fix it ... is to run a relayed power feed wire to the coil, directly from the battery ... Use the original coil positive feed wire, to activate the relay



Mike

Another thought ......

You have to wire the Amp plug to the dizzy the right way ... You can't reverse the positive & negative feed wires .... It (Amp) will not fire the coil if they are the wrong way



When you have been swapping the coils ....have you been reversing the positive & negative connections of the amp (by accident) to the coil??


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Mike

Measure your battery volts ....
Now measure the positive feed power wire at the coil .... if it is less than 1 volt than the battery ... then you have a voltage feed issue

A quick way to test and fix it ... is to run a relayed power feed wire to the coil, directly from the battery ... Use the original coil positive feed wire, to activate the relay



Mike


I also used a relay on mine as you have discribed above and it made a hell of a difference I suspect that the older vehicles wiring degrades as my voltage was quite low - about 10V from memory

Blythe

I have an auto electric coming today to look as I don't have those gadgets to test things.

It's not possible to connect the wires wrong as the connection's are different on each side and the dizzy being new with a new module has ruled that out as well.

I'm starting to think it power to the coil myself not being enough to kick the motor over. But why oh why does the old coil start it ????? and new coil nothing ??????????? not just the original old coil but even my brother's old coil can start it ?????

Originally Posted by blitz

.... my voltage was quite low - about 10V from memory

... your voltage feed issues are also affecting the ECU plus all the other gear ... You need to get the feed issue sorted properly ... Follow the main positive feed line from the battery and check where it enters the cabin with a multi meter

Originally Posted by AussieLandRover

But why oh why

... we are about to find out soon ....

On a side note .... You did disconnect the original amp from service and not running it in parallel with the new Amp, by any chance??

Originally Posted by mike 90 RR

... your voltage feed issues are also affecting the ECU plus all the other gear ... You need to get the feed issue sorted properly ... Follow the main positive feed line from the battery and check where it enters the cabin with a multi meter



... we are about to find out soon ....

On a side note .... You did disconnect the original amp from service and not running it in parallel with the new Amp, by any chance??

good point I hadn't thought about that but it would explain several things being not as they should now that you say that.