Ok, so I guess it must be ignition and not trans??
#21
01-14-2018, 10:03 AM
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I think going with coil replacement is the right move in this case.
I don't think a dead vacuum advance would cause the problem. By design its function is limited to part-throttle, high-vacuum situations.
A problem with the centrifugal advance might be another matter. I'll have to think some. I honestly don't know if lack of centrifugal advance would give the symptom described.
Cheers
DD
I don't think a dead vacuum advance would cause the problem. By design its function is limited to part-throttle, high-vacuum situations.
A problem with the centrifugal advance might be another matter. I'll have to think some. I honestly don't know if lack of centrifugal advance would give the symptom described.
Cheers
DD
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Grant Francis (01-15-2018)
#22
01-14-2018, 01:17 PM
I think going with coil replacement is the right move in this case.
I don't think a dead vacuum advance would cause the problem. By design its function is limited to part-throttle, high-vacuum situations.
A problem with the centrifugal advance might be another matter. I'll have to think some. I honestly don't know if lack of centrifugal advance would give the symptom described.
Cheers
DD
I don't think a dead vacuum advance would cause the problem. By design its function is limited to part-throttle, high-vacuum situations.
A problem with the centrifugal advance might be another matter. I'll have to think some. I honestly don't know if lack of centrifugal advance would give the symptom described.
Cheers
DD
Yeah, I guess I'll start there and see if it fixes it. It's a strange thing especially since it's making the trans shift at that point as well.
#23
01-15-2018, 05:04 AM
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Grant Francis (01-15-2018)
#24
01-15-2018, 08:25 AM
#25
01-20-2018, 07:12 PM
#26
01-20-2018, 07:55 PM
#27
01-20-2018, 10:11 PM
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No, the governor would not come into play unless the car is rolling along
Cheers
DD
#28
01-20-2018, 10:16 PM
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Course I did experiment with my old primary coil... I believe I need to get a new coil and just replace it as this person seemed to have the exact issue and it solved it...
https://www.jaguarforums.com/forum/x...-153911/page2/
https://www.jaguarforums.com/forum/x...-153911/page2/
Pull the distributor cap and give the rotor a twist and release. Does it snap back smartly? It should!
Cheers
DD
#29
01-20-2018, 11:07 PM
When I did everything last spring... the rotor didn't snap back. It twisted "X-amount" but didn't snap back. I lubed it up and it would twist fairly freely but no snap back.
#30
01-21-2018, 12:20 AM
No short cuts with that little forgotten item I am afraid.
#31
01-21-2018, 02:57 AM
I don't think it wanted to snap back... I'd move it and it seemed fairly loose, but I'd have to move it back myself. Bad or stretched springs? I ordered a single coil conversion in the mean time just to make sure it's not the spark.
#32
01-21-2018, 03:23 AM
Maybe, cannot see from here, HA.
Many i have worked on have had damage in that area, due to "stupid" pulling the rotor off without thinking, and the top shaft has "popped" the plastic retainer, and risen to the cause, stretching the springs etc in the process.
Some report a screw in that centre hole, and I have only seen that on the PreHE and Carby V12 distributors, but the USA gets strange stuff, so maybe Lucas did you guys a favour. All mine had the plastic clip or remains of, and 3 are still running with a simple rubber o/ring over the tit, and common sense kicks in when removing the rotor for the annual lubrication.
If the springs are stretched, then you will need to find some replacements, NO idea where, but they will be out there somewhere. A V12 engine fire trashed car, will have springs, and I know there a few of them floating around the USA.
Many i have worked on have had damage in that area, due to "stupid" pulling the rotor off without thinking, and the top shaft has "popped" the plastic retainer, and risen to the cause, stretching the springs etc in the process.
Some report a screw in that centre hole, and I have only seen that on the PreHE and Carby V12 distributors, but the USA gets strange stuff, so maybe Lucas did you guys a favour. All mine had the plastic clip or remains of, and 3 are still running with a simple rubber o/ring over the tit, and common sense kicks in when removing the rotor for the annual lubrication.
If the springs are stretched, then you will need to find some replacements, NO idea where, but they will be out there somewhere. A V12 engine fire trashed car, will have springs, and I know there a few of them floating around the USA.
#33
01-21-2018, 11:37 AM
Maybe, cannot see from here, HA.
Many i have worked on have had damage in that area, due to "stupid" pulling the rotor off without thinking, and the top shaft has "popped" the plastic retainer, and risen to the cause, stretching the springs etc in the process.
Some report a screw in that centre hole, and I have only seen that on the PreHE and Carby V12 distributors, but the USA gets strange stuff, so maybe Lucas did you guys a favour. All mine had the plastic clip or remains of, and 3 are still running with a simple rubber o/ring over the tit, and common sense kicks in when removing the rotor for the annual lubrication.
If the springs are stretched, then you will need to find some replacements, NO idea where, but they will be out there somewhere. A V12 engine fire trashed car, will have springs, and I know there a few of them floating around the USA.
Many i have worked on have had damage in that area, due to "stupid" pulling the rotor off without thinking, and the top shaft has "popped" the plastic retainer, and risen to the cause, stretching the springs etc in the process.
Some report a screw in that centre hole, and I have only seen that on the PreHE and Carby V12 distributors, but the USA gets strange stuff, so maybe Lucas did you guys a favour. All mine had the plastic clip or remains of, and 3 are still running with a simple rubber o/ring over the tit, and common sense kicks in when removing the rotor for the annual lubrication.
If the springs are stretched, then you will need to find some replacements, NO idea where, but they will be out there somewhere. A V12 engine fire trashed car, will have springs, and I know there a few of them floating around the USA.
I remember having an absolutely horrible time getting the starwheel off and probably stretched everything to the brink of uselessness. Is the SnapBack just supposed to let you know it's lubed up good or is there a different reason? I'm hoping the new coil fixes the issue I don't want to go back in the distributor in the spring. I got bigger/better things to fix... like a none charging alternator. 😡
#34
01-22-2018, 05:28 AM
#35
01-22-2018, 11:55 AM
The mechanical advance mechanism MUST return to zero, as designed. Without that taking place the engine simply will not run as designed.
As well as the "snap back" the "advance" movement as the revs rise, also needs to be smooth and non-binding, or the top end will suffer seriously.
As well as the "snap back" the "advance" movement as the revs rise, also needs to be smooth and non-binding, or the top end will suffer seriously.
So the SnapBack happens because of the weights and springs in the advance? So it not doing that is probably a pretty good indicator that my advance is not working properly?
#36
01-23-2018, 05:07 AM
#37
01-23-2018, 12:40 PM
#39
02-19-2018, 12:58 AM
Junior Member
#40
02-19-2018, 09:14 AM
hmm forgot about that little part. I had replaced it but returned it at one point in my search for a no start(My magnetic pickup was bad). I could give the module a try and see if that works. I still have a feeling I "broke" the distributor advance since it won't snap back.