I Own A 1974 XJ6 4.2 Saloon Series 2
Gday im a new member to this forum.I am also a new jaguar owner of about 1 week,I have a problem with no spark from the HT (High Tension)lead however i have a fully charged battery and get the ignition light i can also crank the engine.I have checked That power is getting to the coil,(used a lightbulb and wire from the (+) terminal on the coil to Ground and the lightbulb came on,when the ignition is on).
I have also replaced the points and checked that when they are closed the LT (Low Tension)circuit is complete and when they are open the LT circuit is broken,IE used the lightbulb test,When the points are closed the lightbulb comes on and when the points are open the lightbulb dosnt come on.
Also I have run a new wire from the battery (+) to the (+) terminal on the coil (same result).I have tried another coil aswell with same result.I even disconnected the condenser (still had the same result) The only response i have seen from either coil is a single spark when i turn the ignition back off again.
I had checked to see if the ground wire was earthing out on the points already but no it wasnt.I have also been cranking the engine with Dizzy cap off(had help) rotor button was revolving np.The points had been gapped at .016mm Brand new set.And i had also Brindged the Balast resistor,(to remove it from the equation,)(still had the same result).

If anybody knows what might be causing this problem any help would be most appreciated thank you.

Submitted by silver007@shaw.ca on Fri, 01/16/2004 - 01:03

Hey, do not feel too bad,one of my supervisors once stripped his motorcycle half apart trying to find out why the starter motor wouldn't function. Two hours later he realised he had left the kill switch in the off position. Amazing what two or three beers will do to some folks.
Art Dickenson.
1983 XJS GT \"Silver\"""

Submitted by cyber_mad@hotm… on Wed, 01/14/2004 - 19:42

I Own A 1974 XJ6 4.2 Saloon Series 2

Ok everybody i have found the problem and is fixed now thanks for all your help,i guess its time to take my lumps and tell ya what i did wrong.
It was my fault i did a simple little thing wrong i had put the condensor lead and the points lead on top of the insulator instead of under the insulator meaning it wasnt completing the circuit........DOH.

Feeling Stupid Now.
Again thank you for all of your help it was appreciated.

Submitted by cyber_mad@hotm… on Wed, 01/14/2004 - 05:00

1974 XJ6 4.2 Saloon Series 2

No i dont have another condensor to try as all the others i have are different,Points are cheap $6 .
How do i do an (ohms) check on the coil and coil wire(not getting as far as sparkplug leads just testing HT lead Against engine block to see if ive got spark).
Ive got a multimeter but not sure where to put probes for test ???.(not skilled with multimeter).

Again your help is appreciated thank you.

Submitted by asemastermecha… on Tue, 01/13/2004 - 23:59

Hello Mike
Did you get the second condensor from the same store?
Do you have an old condensor from another engine that you could try?
Twice I have gotten cases of bad condensors.
What is the cost of another set of points?
I can not seem to get your ignition issue off my mind.
Could you (Ohm) check the resistance of coil across all three polls, coil wire and spark plug wires?
Thank you and have a great day.

whunter
ASE Master Mechanic
http://www.woodwardauto.com
asemastermechanicatjuno.com

Submitted by cyber_mad@hotm… on Tue, 01/13/2004 - 18:44

I Own A 1974 XJ6 4.2 Saloon Series 2

Yes sorry i meant Points had been gapped to .016 in'.And just replaced condensor (same result) wont fire from high tension lead except when i back off the ignition then i get a single spark.

Any help is appreciated thanks.

Submitted by SE98-32482CJ on Tue, 01/13/2004 - 06:20

The problem may be that your point gap is off. If as you say you have them gaped at 16mm then re gap them to .016 in. That failing make sure that you have not grounded the condenser or isolated the condenser. Good luck.

George Camp