Hi everyone,names john,

I have an 89 xjs 3.6 jag,the other day started it pulled out the garage and it just died,

after a lot of searching,and still am.the fuel pump doesn't work when you turn ignition on,so checked inersher switch which was down,so went to check fuel pump relay and couldn't find it anywhere. Looked near the main relay which in the book says is adjacent to it,which doesn't seem the case,

struggling like mad with it,anybody any ideas,

many thanks john.

 

The fuel pump relay should be next to the EFI relay in the boot. On my MY94 at least, you have to remove the trunk liner and snake your hand up to the top of the wheel arch. Both relays are mounted on a bracket.

 

Hmmm. Just to possibly clarify a bit and perhaps save you some head scratching, the pump isn't intended to run by simply turning the key 'on'.

The V12 cars have a 'prime' feature which runs the pump for 2-3 seconds when the key is turned 'on', but then the pump shuts off and remains off until the starter is engaged and/or the ECU commands it to be turned on.

I'm not sure if the 3.6 system is set up the same way but, even if it isn't, I'm sure the pump is not intended to come on, and remain running, simply because the key is 'on'.

I'm not saying you *don't* have a fuel pump/pump circuit problem but I don't want to to waste time or face addtional struggles by expecting a result that was never intended to occur, that's all. :-)

Cheers
DD

 

Doug,

I believe you are correct, the 3.6 is configured the same way as the V12.

 

Your right guys it used to go on for a few seconds then turn off,I've nearly stripped out the trunk and stil can only find the relay by the ecu,gonna rip out all the carpet and see what's there.thanks for your input.

 

Hi guys,
I used to have an xjs years ago (have an x300 now) & I know that if the crankshaft sensor suddenly gives up, you can crank the engine til the battery's flat - it will not start.
Just a thought

 

Thanks Steve,but I've no power to the fuel pump,think its a relay?.

 

anyone know if the 3.6 has the inertia switch?? I'd check there.

in my v12 all the relays seem to be in the back next to the battery, you have to remove a panel to get to everything.haven't looked for the fuel pump relay before though.

Is there power through the fuse/is fuse good?

 

Hi John,

Don't know if this is any help:

Look on here for your wiring diagram: captainjaguarscathouse.com

 

Will do Steve thanks