Question about 1994 Jaguar XJ6

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My 1994 jaguar 4.0 motor died going around a corner and hasnt run since .i checked the inertia switch is okim geting power to the oxygen sensor relay for about half a second then nothingthen it drops out.i tested the relay with an outside souce and tests ok.i was getting coolant sensor fault code.but it ohmed out ok and had proper voltage to it spark plugs were carboned up and compression was ok 150 psi.i dont believe its getting fueli changed the fuel filterbut when i loosen the line in too the pressure regulator nothing comes out. Any ideas

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I have had a similar problem, when the wire from the coil to the cap worked it out from the coil just enough to lose contact. It stayed on the coil but the inner wire was out just far enough and looked normal. If your plugs are fouled the air flow sensor may be failing as well. I would clean the outer sensor screen well with a good solvent that leaves no residues and also check for good contact for the wire into the distributor cap.

Posted on May 15, 2010


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My 00 Jaguar s type fuel pump rest button is stuck in a downward position, and now my car won't start

Wire around the inertia switch, use a jumper wire, same size as wires to and from, that should get you going. Replace the inertia switch. The fuse is only hot with the key on. Remember safety is your responsibility. I can't see what your doing from here.
inertia switch-u5j5iukmnxuukmltvfkeizfz-2-0.jpg

Apr 29, 2017 | Jaguar Cars & Trucks

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I hav a 2003 xJ that has been siting up. I usually crank it every other month and it would crank with no problem. I went a couple of months extra and the battery died. I have

usual problem ,get it lot with the long term airport parking,,, join the battery leads together and leave for ten mins while you go to the cafe and have a coffee and a ciggy ,,,then reconnect the battery and it will start first time i promise .X type and S types all suffer from this but not my XJ6 4.0lt 1994

Feb 13, 2016 | 2003 Jaguar XJ-Series

1 Answer

Blower motor on drivers side quit working what could cause this I checked the motor outside of the car and it ran fine jaguar xj12 1994 4 door

Check for power to the switch and from the switch to the motor. You said you checked it outside, so if you put power to it and it works you have to back track the fault to where the power is lost.
It would be no power to switch or no power out of switch or wiring in between.

Jun 07, 2015 | 1994 Jaguar XJ12

1 Answer


You likely tripped the Fuel Shut-Off Inertia Switch.
The inertia switch is located behind the trim on the right-hand
side of the vehicle, forward of the front door post, below the
fascia. Pull open the small panel in the trim to reset the switch.
Resetting the switch
To avoid the possibility of fire or personal injury, do not
reset the inertia switch if you see or smell fuel.
If no fuel leak is apparent, reset the inertia switch as follows:
Press the button!
If the switch was activated by the accident, you should feel it "click" when you reset it by pushing it.

Happy Motoring!

Jan 24, 2014 | 2005 Jaguar S-Type

1 Answer

Flight recorder data is stored.electronic throttle monitor data availabe code p1582

1 Inertia switch activated

2 Throttle Limp Home mode

3 Engine starts and stumbles

4 Engine fail to start
5 Engine stall

If none of the five conditions occur, check: Inertia switch to ECM circuit:

short circuit to B+ voltage Inertia switch failure

You can check the Inertia switch status on the Instrument cluster Diagnosis, see

Jan 30, 2011 | 2002 Jaguar X-Type

1 Answer

1004 XJ6 Won't Start Suddenly - Security System? ECM?

try locking vehicle with remote then unlock it with remote,it might be the security needs to be reset.if that doesnt work look at the inertia switch

Mar 18, 2010 | 1994 Jaguar XJ6

1 Answer

Jag 94 xj6 won't start. error code 99.

the bosch ignition module ,its under the coil

Jun 23, 2009 | 1994 Jaguar XJ6

1 Answer

1988 jaguar xj6 engine turns over it wants to start and at times run for a few seconds

Sounds like fuel.
Check fuel inertia cut off switch is pushed down for on.?
Check for fuel pressure to the engine.
Sure your fuel is not water contaminated ?
Possibly the flow meter is faulty, or has an air leaks on the hose going to the inlet manifold.
I see you posted this on the 14th Dec O8 so perhaps you have it running OK by now ?
Good Luck !

Dec 14, 2008 | 1988 Jaguar XJ6

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