Question about 1986 Jaguar XJSC

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No power to fuel pump

1990 xjs v12 pump does work when another feed is direct to it

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If you tested the pump with another equal voltage source then the pump is bad and needs replacement

Posted on Jan 19, 2009

  • Robert Harper
    Robert Harper Mar 12, 2015

    Test brown wire on fuel pump for 12V current. It there is current, Fuel pump is most likely bad. If no current the using a Jumper wire

  • Robert Harper
    Robert Harper Mar 12, 2015

    Test brown wire on fuel pump for 12V current. It there is current, Fuel pump is most likely bad. If no current the using a Jumper wire from the negative battery post to one of the prongs (facing the rear bumper) of the Relay located behind the right side of the trunk hinge will get the fuel pump working again.

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My 1991 XJS V12 has been sitting for 9 months low fuel, added fuel and tried starting, it turns over fine but does not fire, is there a way to check the fuel pump or if gas is getting to the engine?


first check for a spark thats more than likely ok. the most poss cause is the fuel pump. on the the fuel rail there is a pressure test point like a tire valve. connect a pressure test gauge and crank the engine you should get about 28 -36 psi if not the pump is more than likely stuck, try giving the fuel tank bang with your fist with someone cranking the engine remove spare wheel and trim board for access most likely the moisture in the remaining fuel has corroded the pump, good luck

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Qhere do i find the coolant temp sensor an the map swnsor


Jaguar Sensor, XJ6, XJ8, XJS, XK8, S-TYPE, X-TYPE, XJ40 ...

www.jagbits.com/jaguarsensor.php
FITS: 1993-1994 6.0 XJ12 AND 1989-1993 V12 XJS FROM VIN 157118 ON, 1994-1996 6.0 V12 XJS FRONT DAMPER .... LNA1622AA - MAP SENSOR ... C42166-USED - USED SENSOR COOLANT TEMPERATURE FOR FUEL INJECTION

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1 Answer

Why does idle speed surge?


Thread: 6.0 V12 XJS High RPM When Warm - Jaguar Forum.co.uk

www.jaguarforum.com/showthread.php?t=54266
Mar 3, 2013 - I recently bought a 1993 6.0 V12 XJS and when it is started from cold it runs ... to 1300 RPM so it wants to surge forward when braking which is strange. ...Classics · XJS 3.6,4.0,5.3 & 6.0; 6.0 V12 XJS High RPM When Warm ... You might want to adjust the aux (extra) air valve to bring the idle speed down.

Sep 25, 2015 | 1989 Jaguar XJS 5.3

1 Answer

Jaguar xjs 1995 v12 engine lack of power


I would start with a tune up, then isolate any symptoms other than lack of power if it persists, like rough idle, sputtering, jerking, engine trouble codes, etc.

Jul 30, 2014 | 1995 Jaguar XJS

1 Answer

No oil pressure what so ever in v12 jaguar


have you tried reversing the pipes and see if that makes any difference other than that there must be a pressure difference between the two pumps try priming the filter with oil before starting.

Mar 27, 2009 | 1986 Jaguar XJSC

1 Answer

1990 jaquar xjs v12


Hi

Do you still need HELP ?

Let me know !

John.

Jan 23, 2009 | Jaguar XJS Cars & Trucks

1 Answer

1989 XJS V12 furl problem


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!

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