TA22 Coi/Ignition system

[Noof]

Hi to all the ignition system experts out there.

I have a 71 TA22 and have a problem getting a spark from well anywhere really.

Have tried a few things but no luck. Tried another coil.... nothing.

Starting at the basics... can I just apply my +battery to the +coil and should I get a spark if I disconnect the high ten. lead to the dizzy and place it near a ground?

or is it more complicated than that?

Also my wiring diagrams all refer to a white wire from the ignition but I have two TA22s and they both have black with red stripe?... anyone else seen this? Wiring diagram makes no mention of b/red???

Thanks
Nathan

[RA35GT]

Do you still have the points and ballast resistor ignition ? If so the wiring should look like this
http://members.reynolds.net.au/~poul...c/3K-Model.gif

The + terminal is always at either 12V or ~6-9V.

The points control the earth to the coil -. When the coil- is brought to earth the coil charges up, when the points open the coil discharges through the ht lead.

In order to test, take the coil lead of the dizzy and put a spark plug into the lead. earth the body of the spark plug, either on the car or with a jumper lead. connect +12v to the coil+ and then connect and disconnect an earth to the coil- (do not leave connected long it will burn out the coil) everytime you disconnect you should get a spark.

What wiring diagrams do you have? In one ta22 wiring diagram i have the ignition coil is Black-Yellow. also Black-Red is the constant +12V for the ignition switch. (The wiring in the ra35 is also like this).

Do you have a multimeter? make sure you have +12V at the coil + terminal.
Make sure the points are set correctly. make sure the points themselves are in good nick.
(if no points you may have dodgy ignitor).

[kickstartRA28]

Nine times out of ten its your points either incorrect gap or just dirty etc......try new points and reset gap.............also a very cheap fix if it is the problem....

[Noof]

OK thanks so far....

Have checked tonight that the earth is ok and points seem to be ok??

Quick question... if the -ive is earthed too long the coil burns out? What happens if the ignition is on and the dizzy points closed? effectively earthing the coil for as long as the ignition is left on without turning over the engine??? Or is that why the lead from the starter? is there??

If the coil is burnt out what are the symptoms?... Havent had a chance to check properly tonight as my battery is flat so on the charger?


Cheers
Nathan

[RA35GT]

Thats why you shouldnt leave the ignition on without the engine running on points cars. to ensure coil doesnt overheat and cark it. (realistically it will take a while, but how long depends on the coil)

The resistor reduces the current that flows during normal engine running. The starter lead is there to raise coil voltage to 12V during starting to make it easier to start.

generally if a coil is burnt out it will either not work at all, or only under low load. if you have tried another one, its probably not the coil. (if you have a multimeter you can check the resistance of the windings)

seeing as you have no spark, it can only be a few things:

The lead from the coil (can you swap with a cylinder lead?)
The coil itself (you already have swapped so it should be ok, make sure there is power to it though)
the points (how did you check? did you check the surfaces and did you check the points gap, is the connection between the coil - and the points good?)
a dodgy condensor may also cause no sparking

[Noof]

Ok Tonight I have checked the coil as described above. I get a spark when earthing the -ive terminal as expected. Not a superbright spark but a spark none the less.
Coil working ..... check.

I also checked that my -ive terminal on the dizzy was being earthed as the dizzy rotates...... check.

I have a multimeter and have checked the winding resistance. Primary is a little low at 1.3 Ohm and the secondary is in the range at 8.5KOhm. Is the 1.3 the problem? as the spec is 3.3? although the later model (which this coil could be from??) says 1.3 is spec. Or do I have to chase a 3.3 Ohm coil from another TA22?

I did not check the points gap. I guess under load this gap might be earthing out? where under the meter only its ok?

[Noof]

Incidentally the starter which I have on the car at the moment has no terminal to go to the coil....... this is an early model ta22 but my later model "virtual Manual" has one.. maybe I should swap the starters?

Cheers
Nathan

[71TA22]

Incidentally the starter which I have on the car at the moment has no terminal to go to the coil....... this is an early model ta22 but my later model "virtual Manual" has one.. maybe I should swap the starters?

Nathan,

The starter - coil conection, or lack of, is not the problem. No point in changing starter.

You have shown that the coil is providing a spark. The problem lies between the distributor and the spark plugs so you are down to:

The points

The condensor

The distributor cap

The plug leads

The spark plugs

Best of luck.

[RA35GT]

Nathan,

The starter - coil conection, or lack of, is not the problem. No point in changing starter.

You have shown that the coil is providing a spark. The problem lies between the distributor and the spark plugs so you are down to:

The points

The condensor

The distributor cap

The plug leads

The spark plugs

Best of luck.

Yeah as 71ta22 said, the lack of the starter wire on the coil wont stop it working.

in addition to 71ta22 list also check the rotor in the dizzy.

the points gap determines the dwell time of the coil so this needs to be setup correctly to ensure the coil gets sufficient charge built up.

[Noof]

OK Thanks. At least I know where to look now! I could swap the dizzy which could be an easy fix if the 2tg and 2t dizzy is the same?
Rotor in dizzy is pretty new and so is cap. best of the ones I have.

Now the points........... or condensor.
Probably have more questions soon.
Cheers
Nathan

[Noof]

Ok had a play this morning before footy wake....... slow day tomorrow!!

replaced the dizzy with a better one..... seem to have a spark now!
Thanks to those who helped with this problem.

Cheers
Nathan