Can i ask if anycan help just purchased v12 xjs been stood 12 months started now and then got car yesterday started and drove a few miles stopped and started no problem later she wouldn’t start sounding like battery fitted new one just the same engine turns over one maybe twice very slowly then starts clicking again any suggestions

 

Daniel29,

If you have a new battery properly fitted and the starter is turning slowly / clicking, then it's an issue with current getting to the starter.

Check the bulkhead positive and negative terminals, the connections a the starter motor and the earth from the engine to the body. The problem is somewhere in the circuit and these are the key points which can affect current flow.

Good luck

Paul

 

Thank you would you know where on the bulk head

 

You haven't added the year and model of your car in your signature. But generally, they are on both the left and right hand side not too far down from the scuttle edge, and if intact will have small rubber boots over the attachment nuts.

Cheers

Paul

 

The nuts are some weird size, don't loose them!

My first thought is the ground strap between the engine and the chassis. For some reason, known only to Jaguar engineers, it makes a stop at the subframe. The best thing to do is to add a new heavy gauge wire between the engine and the body, skipping the subframe.

 

ALSO.

Fill the beer fridge.

In the boot, alongside the battery are a bunch of earth wires, CLEAN THEM, then CLEAN THEM AGAIN, and resecure with a smear of grease.

Now, in the engine bay, there are EARTH wires all over the place, hence the beer. ONE AT A TIME, clean them the same.

Look at the LH engine mount, there :should be; 2 earth straps, engine to cradle, cradle to chassis, THEY FAIL. I retro a standard earth cable engine to chassis

You mentioned an 89 Ragtop in the New Members Area.

That is a change year for the engine management system and other areas.
14 HT leads = Marelli system.
13 HT leads = Luacs system.
IT MATTERS, if you want the correct advice.

I know you be new, congratulations on a REAL engined Jag.

Add the vehicle details to your Sig, via the CP tab on the top left. It will save a lot of guess work for us over the years.

Keep that fridge full ya gonna need it, haha.

 

[QUOTE=garethashenden;2749097]The nuts are some weird size, don't loose them!

BSW. British Standard Whitworth.

From Google:
The Unified thread angle is 60° and has flattened crests (Whitworth crests are rounded). From 1⁄4 in up to 1+1⁄2 in, thread pitch is the same in both systems except that the thread pitch for the 1⁄2 in bolt is 12 threads per inch (tpi) in BSW versus 13 tpi in the UNC.

UNC fasteners are more readily available, but the AF size is different to BSW. You need a set of BSW wrenches which are an odd size.