Hello All,

So need advice on where to start. I just bought a 1994 Xj12 used for 1600. I drove it 8 hours home but I suspect it's been sitting for quite some time before I bought it. The ABS light is on, the fuel gauge doesn't work, and the SLS reservoir leaks like a sieve. Those are the problems I can see. I also have a fuel problem. If I shut the car off and top off the tank, have trouble starting and then sometimes I will drive for about 30 min and the car will stall out.

I'm not a mechanic but I want to learn about this car. Should I take it to a specialist and spend the 385.00 he wants to go through the car and tell me everything wrong and then start fixing major issues first?

Help!

E.

 

Hi E.,

Congratulations on acquiring your 1994 XJ12! That is a truly fine machine and deserves to be properly maintained.

The ABS light could indicate a problem with a wheel speed sensor, such as rust contamination of the sensor itself, a failing sensor, or a break in the wiring harness to a sensor. A good start would be to remove and clean all the sensors and reluctor wheels. If that does not resolve the problem, more in-depth diagnosis will be required.

The most common cause of an inoperative fuel gauge is failure of the fuel level sender, which is mounted about halfway up the rear surface of the fuel tank. The sender can be replaced without removing the fuel tank as long as the fuel level is less than 1/3 full or so.

The SLS reservoir leak should be a matter of either repairing or replacing the reservoir.

Starting and running problems when you top off the fuel tank could indicate a problem with the Evaporative Emissions (EVAP) system such as a stuck-closed carbon canister control valve (Rochester valve). The obvious short-term answer is to stop filling it with fuel after the nozzle clicks off the first time.

Stalling while driving, especially stalling while slowing to stop or turn, has been associated with low transmission fluid.

Your XJ12 was one of the most sophisticated automobiles available in 1994 and is still a highly-complex machine. Enlisting the help of a knowledgeable specialist is a good idea as you learn more and are able to perform some of the required service and maintenance yourself. The brake system on your car is far more complex than in most cars, so having that checked for your own safety would be a good place to start.

We'll be excited to follow along with you on your journey. Please post some photos when you get the chance!

Cheers,

Don