Fuel 39 Code

Thanks, I will try that. I found the Haynes Repair Manual. It says the code 39 could be the EGR gas temperature sensor. That does not have a vacuum line connected to it. Could the fault mean two things? My car is a 1994 XJ6. David @ renegarfarmbellsouth.net

You can probably find an EGR valve at your local CarQuest as a General Motors part number. The one that fit my car was an EGV347.

Which Jaguar (Whay model and year?)

On an XJ40 (1988 - 1994 XJ6) "Fuel 39" means faulty EGR valve. I just had this happen on my 1992 XJ40 last week. Test the valve first before you replace it. With the car running, disconnect the vacuum line to the EGR valve. Attach a hand vacuum pump to it and pump it up. The engine should start running rough and the EGR valve should hold vacuum. You should also be able to put your fingers on the underneath side of the valve and feel it move when you apply vacuum to it.

In my case, the diaphragm on the EGR valve was shot and it did NOT hold vacuum. If you don't have a hand vacuum pump, just attach a piece of vacuum hose and suck on it with your mouth.

This is actually all outlined in the Haynes manual which I find to be an extremely valuable reference. I have a Haynes manual for my Series III XJ6 and another one for my XJ40.