V12. one bank lean, one bank rich???
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Junior Member
Joined: Jan 2016
Posts: 3
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From: melbourne
V12. one bank lean, one bank rich???
Hello.
Ive been re-assembling a 1976 v12 coupe from boxes and boxes of parts, what was a completely empty engine bay (no wiring, nothing...) now has a running motor. which is good.
first started with 3 injectors not firing, replaced amplifier and runs, idles, revs well etc.
But, the r/h bank has all white plugs and is running HOT compared to the l/h bank, running all sooty plugs.
This is prior to any cooling issues/ thermostats/radiators etc.
Ive not run it for more than a minute at a time so far.
Anybody experienced this problem?
Cheers,
Stephen.
Melbourne
Ive been re-assembling a 1976 v12 coupe from boxes and boxes of parts, what was a completely empty engine bay (no wiring, nothing...) now has a running motor. which is good.
first started with 3 injectors not firing, replaced amplifier and runs, idles, revs well etc.
But, the r/h bank has all white plugs and is running HOT compared to the l/h bank, running all sooty plugs.
This is prior to any cooling issues/ thermostats/radiators etc.
Ive not run it for more than a minute at a time so far.
Anybody experienced this problem?
Cheers,
Stephen.
Melbourne
Joined: Dec 2011
Posts: 120,439
Likes: 17,009
From: Durham, UK
Welcome to the forum Stephen,
Good to have you with us at Jaguar forums.
Although you have a Daimler Double Six Coupe, for this specific engine issue, you will find a lot of the V12 experts in the XJS tech forum - XJS ( X27 ) - Jaguar Forums - Jaguar Enthusiasts Forum
Follow this link XJ6 & XJ12 Series I, II & III - Jaguar Forums - Jaguar Enthusiasts Forum to the XJ6 & XJ12 Series I, II & III forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for info on regular issues.
Please remember to add vehicle details to your Signature to help others to give relevant advice. Go to the User CP button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.
You can also visit the Australia - Victoria / Tasmania Region forum by following this link Australia - Victoria / Tasmania - Jaguar Forums - Jaguar Enthusiasts Forum to find other members in your region.
Enjoy the forums.
Graham
Good to have you with us at Jaguar forums.
Although you have a Daimler Double Six Coupe, for this specific engine issue, you will find a lot of the V12 experts in the XJS tech forum - XJS ( X27 ) - Jaguar Forums - Jaguar Enthusiasts Forum
Follow this link XJ6 & XJ12 Series I, II & III - Jaguar Forums - Jaguar Enthusiasts Forum to the XJ6 & XJ12 Series I, II & III forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for info on regular issues.
Please remember to add vehicle details to your Signature to help others to give relevant advice. Go to the User CP button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.
You can also visit the Australia - Victoria / Tasmania Region forum by following this link Australia - Victoria / Tasmania - Jaguar Forums - Jaguar Enthusiasts Forum to find other members in your region.
Enjoy the forums.
Graham
Joined: Feb 2010
Posts: 28,811
Likes: 11,280
From: Adelaide Stralia
Welcome.
See ya in V12 section you select.
Fuel pressures is my first best guess, at this stage. Those 2 mechanical FPR's are time consuming to get balanced, and the 31psi specified is mostly too high. Mine runs sweet on 29.
Short stop start running of a PreHE engine is a dead set recipe for fouled plugs, they simply dont like it, and the D Jetronic has absolutely no finese at all.
See ya in V12 section you select.
Fuel pressures is my first best guess, at this stage. Those 2 mechanical FPR's are time consuming to get balanced, and the 31psi specified is mostly too high. Mine runs sweet on 29.
Short stop start running of a PreHE engine is a dead set recipe for fouled plugs, they simply dont like it, and the D Jetronic has absolutely no finese at all.
Joined: Oct 2007
Posts: 121,065
Likes: 6,652
From: PHX some of the time
Welcome to Jaguar Forums Stephen,
Good to have you with us.
Enjoy the forum.
If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help
Good to have you with us.
Enjoy the forum.
If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help
Joined: Apr 2012
Posts: 25,844
Likes: 4,707
From: Summerville, South Carolina
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There are lots of members local to you with the same interests with info on local dealers and possible meets.
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