Just bought a XJ12, great shape. One problem, it won't start. Put a new battery in, got spark and have fuel in the fuel line. Checked the VCM and it says Fuse 5 Fail. I have the manual and it doesn't trouble shoot. Thinking that it's either fuel injection system or fuel pumps. Put ether in 2 cylinders but would not start.

 

Have you verified fuel pressure? Replaced the fuel filter?

 

First thing to do here is change out the four relays at the firewall by the RH bonnet latch. Pay attention to the number of pins on each.

Good luck!

 

Thanks for the info. Will let you know how it goes.

 

Oh, BTW.....

Fuse 5 Fail is one of the two 30 Amp fuses in a small block in front the driver side fuse box, lower "A" pillar. Has to do with the ABS system.

Cheers,

 

You should not rule out inertia switch either , I can't hold candle to the members who has posted their valuable inputs though

 

OK, replaced all 5 relays on the firewall on the passenger side engine area. Also replaced the fuel filter. Have not checked the fuel pressure as of yet. Vehicle did not start.
Going to check fuel pressure to see if the fuel pumps needed to be replaced.
Have not found the two 30 amp fuses on the A pillar to cancel out the Fuse 5 Fail.
Will keep plugging away.
Thanks for the help.

Bill

 

Do you hear the pump when you turn the key on?

 

Looks like I may have erred with the fuses. Check the LH fusebox, fuses B9 and C6. They should each be 30 amp. Are either of them blown? Fuse 5 Fail should indicate one of them is blown. Old age settin' in.

Fuel pump #1 relay is behind the boot side trim, in front of the RH tail lamp. You could jump the terminals and see if the pump in the tank can be heard running. Pump #2 relay is part of a relay module above the RR wheel, harder to get at.

Did you check for spark at the plugs or at the coil wires?? Check at the plugs to be sure you don't have a burned through distributor rotor grounding your spark.

Cheers,

 

I want to thank everyone for their response to my problem with my Jag. I was able to start the vehicle yesterday. I changed out the fuel pump relay and it started right up. I also found the valve covers loose, so I tightened them up.
Runs great.

 

Great news, glad you got it sorted out