me too. i guess im just sticking with what i know. boosted 3.8's

 

Not going to try the Megasquirt route either?

 

its the same money, but i can put a 4 speed auto behind the L67 instead. not to mention that im not even certain that the problem isnt in the engine.

i might still go that route.

 

After listening to the video, I'm pretty positive it isn't the engine, it's the electronics. I had a similar problem with mine shutting off for no apparent reason and I found out quite by accident that it was that stupid shielded wire. I bypassed it, and moved the electronic spark control and that solved the problem.

 

The wire is shielded because the spark controller (which also ties into the injector timing I believe) is very sensitive to electric/magnetic fields like the ones produced by the coil.

 

the green wire with the ground core? thats like the only one i havent replaced.

 

I think mine was white and thicker than the others that feed into the controller. If you strip it back you'll see it has a wire mesh under the insulation, and then another, smaller wire that runs through the center. Mine was cracked in numerous spots so I cut it all the way back to the fender and ran the ground back to the ECU, and the inside wire to the controller.

 

I know this has gone off topic, but I did it for a reason. Some time ago you posted how you were working a low paying job and someone came in with a V12 XJS, and you decided you wanted one and that started you on the way to better employment.

Would the young man who first saw that XJS have started the path you've taken if it had been a lump?

 

thats a good question. the dude told me it was an 8.0l V12. lol

 

take me a picture of this wire.

 

I'll see what I can do.

 

I'll text it to your cell when I get out of work.

 

Just sent you those pics. It was a thick white wire that has a ground mesh inside the insulation with a tiny wire in the center that goes to the spark controller. The grounded mesh just goes back into a solid black wire that feeds back to ECU

 

how far back did you replace?

 

Sorry got home really late last night so didn't take the pics of the engine mounts. Do you still want them or are you going to persevere with the V12. If you decide to dump it I’ll have it.

I really hope you keep the V12.

You have more than one problem in the system and these multiple faults can be difficult to find. The way to go about it is by systematically working through everything fixing things as you find them.

Faultfinding 101 do ONE thing at a time working sequentially through.

DO’s
Work on ONE system at a time. ie get the ignition working so as far as you can tell it is working correctly, THEN move on to fuel get this working as best as you can tell, then move on – you get the picture.

Keep a diary of what you change and what effect it has.

DO NOT’S
Change multiple things at once
Flit from ignition to fuel to something else or you will end up with confusion and never get the problem sorted.

 

ignition is fine. fuel is screwed and i dont know why. ive been through everything except this one wire that Jamey is talking about.

 

my amp signal wire has had a botched repair at some point. looks like a kindergartener did it with string and electrical tape.

here is how it is currently wired.

if this is incorrect, please show me how it ought to be wired.

 

I have to second JameyXJ6. SAVE THE V12 and LIVE YOUR DREAM!!!

 

Yes, that looks correct, but if the wires have poor connections it will pick up interference from the surrounding wires.

 

Also the shield should be grounded at ONE end ONLY. Grounding at both ends can cause interferance in the sheild which will be transmitted to the internal conductor.