Hello folks,

Are there any experts on the engine electrical systems of these cars on here that could possibly help me? I am trying to find out how deeply integrated the engine immobilizer system is with the rest of the vehicle loom.

The reason I am asking is I am hoping to buy an end of life S-type 3.0ltr manual and transplant the engine and gearbox into my old '71 Reliant Scimitar:



I would like to run the engine on the original management but I know that modern engine management systems tend to be wired into pretty much everything these days.

Has anyone managed to separate all the required parts from the vehicles electrics to make the engine work stand alone?

Hope this doesn't upset any S-type owners, the potential donor car will be a complete snotter (nearly wrote something else there but this forum might be a bit too posh), just so long as the engine is sound (i.e. an early car with worn out rear subframe bushes).

Thanks for any help,

Smiler.

 

I suspect you either need just engine and a non-jag PCM or else engine+PCM+other modules (quite a few of them). It's a decentralised immobiliser+security system. I don't think anyone offers anything to bypass anything as there is next to no-one even offering tuning.

 

If your trying to do it cheap you picked the wrong engine!
No one has broken the programming so unlike the Ford/GM stuff you can't disable anything.

It will be a huge job to get it to work. The only practical way would be to dump the Jaguar electronics and control the engine with a stand alone system like FAST or MegaSquirt. Even then you will spend way too much!!

* *MegaSquirt - Electronic Fuel Injection Computer by Bowling & Grippo * *

Why don't you buy an S Type the are very cheap.
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Hang on. Could be cheap (over here). Just need to keep the right modules connected. Can probably dump most of the sensors etc.

Thing to always remember is to keep a few "extra" modules so the ones you actually need are happy.

Grab JTIS - workshop manual - free download. Has elec guide.

Now... worry about ABS/DSC, and thus the rear diff ratio etc.

Also, which era 3.0? Before 2002.5MY is one, and after is another. Very different set of modules (mainly the PCM).

For a manual at least you don't have to dream of deleting the autobox logic

I think you'll need fuel pump & its module.

Probably FEM/GECM and/or RECM and ICM. SCLM. ABS/DSC. PCM (aka ECM) of course. Keys incl transponders.

Whole engine and all its sensors & actuators. Accelerator pedal etc as it's drive by wire.

No idea how to cope with Evap system - just keep it I suppose.

 

Many thanks for the replies, it's very much appreciated.

I was afraid that the thing would be integrated into everything else.

I am planning on buying a complete car (I've fallen foul of 'piecemeal' engine conversions in the past) and keep removing things until the engine throws a sulk. The car, by virtue of its value, will be pre 2002. More likely late 90's.

I shall certainly look at the free download, thanks for that.
I had also thought about mega-squirt so thanks for that link.

If all else fails I might look into the Ford Duratech management, I know it doesn't have variable valve timing or inlet systems but it still gives 200bhp. The main bonus with the S-type lump, apart from an extra 40bhp, is its north-south arrangement and proper fitted RWD manual gearbox. Most cars of that capacity over here are autos.

The other benefit is the reduced weight of an alloy block. The Vaxhaull Omega V6 is proving a popular conversion with these cars but has an iron block and has already been done. Though it would probably be the chaper option...

Cheers,

Smiler.

 

With the ABS you'll also need the 4 sensors, of course.

 

The ABS interconnection could be the nail in the coffin for using the original management. Looks like I'll be doing some more research into megasquirt....

 

The real deal killer will be the PATS system. Unless you get that working the car will never start.
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The PATS system was basically what I was looking at with my initial post. I hadn't accounted for the ABS system interaction though. I know that on many cars this only serves as a feedback loop for traction control and some cars will still run happily without it connected. I wonder if the Jag engine will be happy or if it'll get all OCD over it and go into limp home mode.

 

PATS should be no problem if you keep the various modules.

 

Well if this goes ahead I'll be buying a complete car regardless so I'll just strip the car down and start unpluging things until it throws a sulk. ABS will be one of the first to make sure that it won't actually upset the engine as I suspect it's only for traction control feedback purposes.

 

It may well get the speed (i.e. VSS) from the ABS. Not knowing speed it may be worse than sulky, but try it

 

That's very true, I'll see what happens.

Where ca I find the free JTIS? The only one I've found on this forum insist that you accept a free upgrade (installing a program it would appear) and register with the provider.

 

Never heard of that. PM a moderator if no-one says anything.

 

A bit of progress, there is an S-type advertised for sale with an ABS fault. Speaking to the vendor, other than having no traction control it has had no effect on the performance or behavior of the engine. So that's one less head-ache.