20 Most Recent 1986 Jaguar XJ6 - Page 9 Questions & Answers

oxygen sensors may need renewal-getta data stream run to pinpoint the problems--dont go to a dealer--partsplace or a specialist only

change or check the propotionate valve

Any codes logged?? Poss wiring fault, short somewhere maybe

no you will short your car out

If the fuel pressure regulator is vac controlled, and the diaphram is leaking, the vac hose can **** fuel into the intake.

check air filter

Its issue with fuel filter.Have you also replaced the fuel filter too.If its blocked then it can also cause this problem.Also in some cases its seen that new fuel pump comes out faulty.Was it original fuel pump or aftermarket fuel pump.Get the fuel pressure checked.If the pressure is low,then it can be issue with the new fuel pump.------------For more help Click the link below:-----http://repairhelpcenter.blogspot.in/2012/05/jaguar-fuel-pump-problems.html -------------This will help.Thanks.