XJS Needs Help

The proper spring compressor tool can be hired for about £40 from the Jaguar Enthusiasts Club - I changed my springs on a 3.6 & would not recommend 'knocking something up' !!!! The right tool is a long threaded bar that goes up the middle, there's a huge amount of compression and sideways forces involved.

Hello Ivar,

Idle speed:

I had a similar problem with my 84 XJSV12. After trying ALL the simple measures the only thing which cured the problem was to replace the ECU. I was fortunate as I had an XJ12 saloon and was able to swap the ECU's to test, the same happened on the salooon after the swap, the XJS ran beautifully.

If you have a friend with a similar year car............................ otherwise I would say, stump up the cash!

Hi people.

Thanks for the feedback. I changed the front coil springs on my XJS without the use of a compressor. This is how I did it: Jack up front of car until road wheels about 3 inches off the ground. Remove wheels and anti roll bar link Remove one of the bolts from bottom of the lower wishbone. Replace with 3/8 UNF threaded bar about 10in long and plain nut and washer. Do the same with the other 3 bolts (One at a time) Remove the 2 nuts at the ball joint end of the spring plate. Unwind the 4 nuts about 5 turns at a time until the end of the threaded bars is reached (this took about an hour!!) Take out spring and replace with new. Rewind the 4 nuts about 5 turns at a time, until spring plate is tight against the wishbone. (This took over an hour) Replace each threaded bar with a new high tensile bolt (one at a time) Put back the other parts. It worked for me. It would have taken days rather than hours if I didn't have a ratchet spanner.

Thanks

Ivar