Question about 1984 Jaguar XJ
Hello,I just bought an XJS V12 convt.It starts right up but idles rough has pretty good power but blowing black smoke from tail pipes even at idle.I checked two of the spark plugs and they where carboned very bad one was wet and smelled like fuel i did an oil change and the oil was diluted with gas,Could this be due to either a bad fuel injector or a bad cylinder not firing and the fuel going past the rings into the oil?
Obviously, fuel and oil should never be in the same spot at the same time. You have a dead cylinder and maybe a stuck-open injector. The black smoke is from a too-rich fuel mix, so the cheap things to look for are in the fuel injection system. Look at the fuel pressure regulator as well. Good luck, and don't forget to relieve the fuel pressure before you do any work on fuel inj. engines!
Posted on Aug 22, 2009
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 20, 2018 | Jaguar Cars & Trucks
Aug 27, 2016 | Jaguar XJS Cars & Trucks
Sep 25, 2015 | Cars & Trucks
Sep 25, 2015 | 1989 Jaguar XJS 5.3
Mar 31, 2011 | Jaguar XJS Cars & Trucks
Oct 04, 2010 | 1989 Jaguar XJ6
Jul 13, 2010 | 1986 Jaguar XJSC
Sep 27, 2008 | 1986 Jaguar XJSC
495 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: