Question about 1988 Jaguar XJ6

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1988 jaguar xj6 replaced temp presure regulator, fuel pump and fuel filter and it still vapor locks when abient temp is over 90 F.

Engine is not overheating under 90 Celsius. When Jaguar dealer replaced the fuel pump in the tank I believe it was not secured properly as we can hear what sounds like something rolling around in the trunk yet there is nothing in the trunk. also The car sat for 20 years in a garage from 1988 to 2008 when we bought it with 20,000 miles however the problem did not begin before 70,000 miles in addition to fuel pump, fuel pressure regulator, and fuel filter, we have replaced the coil, rotor cap, rotor wires and spark plugs. in cool weather runs fine. Have yet to replace the return fuel line, however we wonder what else could be the culprit

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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ftw1952
  • 10319 Answers

SOURCE: 1988 Jaguar XJ6 S-LINE 4.0L V-6

Fuel pump is bad or plugged fuel filter it seems. Crack the line from the filter leading towards the engine first. If gas starts squirting out fast, you have good pressue. If not the filter is plugged or a bad pump. How old is the fuel filter by chance? If original its plugged up by now

Posted on May 24, 2009

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SOURCE: 1994 XJ6 hard start problem

Check Air Flow meter/Sensor

Posted on Aug 14, 2009

citroenchris
  • 600 Answers

SOURCE: cant locate fuel pump to replace on 89 xj6 jaguar

in the boot(trunk in n america) lift out the ply cover on the spare wheel, and the wheel, between the wheel and the rear is a ply and steel filler panel, held in by screwa, unscrew these and the pump (s) is under there.

Posted on Oct 01, 2009

alicantecoli
  • 22484 Answers

SOURCE: jaguar xj6 won't start

Timing out ,check it on no1 cylinder at TDC then check distributor position ,the arm is pointing at no1 plug lead

Posted on Dec 14, 2009

  • 24 Answers

SOURCE: 1995 xj6 jaguar, doesn't liketo start when cold,

check your flowmeter, this electronic device moniters air/fuel mixture, commonly located on the inlet manifold near injectors

Posted on Jan 22, 2010

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Vapor lock when the engine is runnig. How do I fix this issue


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Fuel pump is bad or plugged fuel filter it seems. Crack the line from the filter leading towards the engine first. If gas starts squirting out fast, you have good pressue. If not the filter is plugged or a bad pump. How old is the fuel filter by chance? If original its plugged up by now

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