Can you provide the part number of the Crane ignition system? I'm not aware that Crane makes anything that will fire 12 cylinders (unless you are using two systems).

 

I ran the Crane XR3000 system on my 71 V12 E Type for over 10 years with no problem whatsoever. I think the coil was a PS90 which was a 12 volt coil.

 

Check or replace the coolant temp sensor. Do you have an ohm meters? If so we can provide specs for the sensor. Also make sure the connector/plug is in good condition

Excessive fuel pressure can also cause strong over-fueling. Do you have a pressure gauge?

Remove the vacuum hoses from the pressure regulators. If you see raw fuel in the hoses the regulator is leaking and the raw fuel is being drawn right into the engine



Decent Ser III V12 wiring diagrams are a little scarce. The ones in the factory manuals are hard to read but better than nothing. Your best bet is to use the XJS diagrams....the fuel injection stuff should be virtually (or perhaps literally) the same. There are much better diagrams available for the XJS.

Also, go to the top of the XJS section and open the How-to sticky thread. There are some downloads in there. Look for the "S58 Engine Performance Manual". Tons of good info on the ignition and fuel injections systems

A download for the Jaguar wiring guides might be there as well.

Cheers
DD

 

My 1978 car has a Crane XR700 ignition on a Lucas Opus distributor. I am still fighting drivability issues, but I do not believe my issues are spark related. I found an on line XR700 installation guide on line, if you cannot locate it, I can send it to you, send me an email or PM

 

if the ignition system wasn't right for the car would it still run? and if it did run would it be rich because the system can only fire up to eight cylinders? not sure what the part # is but I don't think its the right one. is there any way that the wire he ran because he had no injector pulse was essentially a hot wire so now the comp is rust constantly dumping fuel in the cylinders?

 

According to cranes site the XR700 is for 4, 6, and 8 cyl Lucas opus distributors. I'm assuming you have a V-12. My recent TR-6 had a crane xr3000 with the ballasted system still on board ( crane was previous owner install) the xr3000 doesn't work well on the ballasted system, hence my drive ability issues, swapped it for a proper accuspark system and all is well.

 

http://www.cranecams.com/404-405.pdf

Part No. 700-2300
Includes shutters and brackets for installation of optical trigger on 1979-83 British
imports with 4, 6 and 8 cylinder engines equipped with Lucas OPUS distributors. For
applications where the OPUS module has failed and must be eliminated. Note that the
HI-6S is not compatible with 12 cylinder engines.

I see through searches where the xr700 used to be applicable to V-12's and from some of those sites I see it as a finicky installation on the V-12 distributor. Not saying it's your problem but I'd be leary of it.

 

would the car still run?

 

My TR6 ran, but ran like crap, hard to start, gutless, missing under throttle. Pulled off the crane xr3000 and put the right system on for the ballast and viola, easy starts, no misses, plenty of perk. It's kind of an old adage that most perceive fuel problems are ignition and vice versa.

 

I'm not a big fan of aftermarket ignitions on the V-12 especially if someone's fiddled with the ECU. I'm running the original lucas distributor with single coil set-up

 

would you recommend using the GM HEI module as a replacement?

 

I'd recommend going back to a known entity which is a stock set-up if you have that option.

 

Hi there


there is a fully comprehensive article about the installation of the Crane system on Ed Sowell's site. Installation of a Crane XR700 Ignition System


I have the identical system installed on our 1976 XJS (V12) which performs flawlessly at all times. reading about your issues I would suggest that the problem may be elsewhere other than the Crane installation.


have fun
BernardS

 

what should the ohms be? and how could one set the fuel pressure if it is high?

 

It may well not be the crane system, it may very well be the way the PO installed it. We still haven't determined which crane system the PO installed.

 

Same car/OP in the XJ area.

I have answerd in there just now, so a read may be a good idea.

I think that engine is a HE???. So maybe not an 81 car??.

 

My bad, thought we were dealing XJS here, now it's clear as mud!😀