I am having issues with my xj6 series 3 which I have owned for 2 months.
The engine is running rough and chugging slightly.I had to get towed home as I could not drive it.
Since this episode I have flushed both fuel tanks several times and the fuel came out brown and lots of flakes also,this was done over a 4 hour period until the fuel came out clean.
I also replaced fuel filter which was full of crap and flushed the hoses to the pump,I do not know how the fuel was getting through.
Now the car is sometimes running great and then starts to run rough again,the tacho occassionaly fluctuates between 750 and 850 with either tank selected.
When I open the fuel tank caps I get pressure releasing,is this normal?
The timing is set as per decal on bonnet to 4 deg BTDC and I have adjusted the RPM to 800 but the allen screw seems to be in too far.
The fuel return to the tanks is working correctly ie left selected fuel returns to left tank and visa versa.
I thought it may be the cannister in the right front guard as the vacuum valve was disconnected when I bought the car,but it makes no difference if its connected or not.
I think the car had been sitting for about 4 years before I got it.
Has anyone got any more ideas of what I could look at.
1982 XJ6 Series 3