I have a 94 xj6 that I have to spray starting fluid to start and then i have to continue spraying starter fluid until it finally "catches hold" and will maintain an idle.

If I try to maintain it by using the accelerator pedal after the first initial "blast" of ether, it acts as if it is not even connected to the throttle. What would be my first, second, and third possibilities to consider in my effort to diagnose and repair this?

Thank you

 

Hi yassinesd,

Welcome to the Jaguar Forums!

I have moved your post from the X350 forum to the forum for the XJ40, which is the Jaguar factory code for your 1994 XJ6. Here you will find owners of similar cars who may be able to provide helpful suggestions for addressing your car's starting problem.

My first impression is that you have a fuel delivery problem. The first test you can do is to turn the key to Position II (Ignition ON) without starting the engine and listen for the fuel pump to run for a couple of seconds to prime and pressurize the fuel lines. You should hear the pump's electric motor run from behind the rear seat of the car.

Below is a procedure for diagnosing problems with the fuel pump and its associated circuits from Bryan N at the Jag-Lovers XJ40 forum:

XJ40 - ‘93 / ‘94 Fuel Pump Circuit Test Procedure - Issue 2

[Assuming that you have dash lights with the ignition 'ON']

1) With ignition OFF
2) Remove fuel pump relay (black base, right rear corner
trunk above BFM)
3) Do you get 12 volts at pin 30 (Brown/yellow) of the fuel
pump relay base from fuse C6 in right fuse box?
4) If yes, jump pin 30 (Brown/yellow) and pin 87 (Blue/red)
in fuel pump relay base - does the pump run continuously?
5) If pump does not run, fault is in the wiring / connector
between fuel pump relay and pump
6) If pump runs, suspect fuel pump relay is defective.
7) Replace / re-fit fuel pump relay
8) Remove oxy sensor heater relay (yellow base on firewall)
9) Do you get 12 volts at pin 30 (Brown/pink) of the oxy
sensor heater relay base from fuse C4 in right fuse box?
10) If yes, jump pin 30 (Brown/pink) and pin 87
(Blue/purple) in oxy sensor heater relay base - does the
pump run continuously?
11) If pump runs, suspect oxy sensor heater relay is defective
12) Replace / refit oxy sensor heater relay
13) Remove EMS main relay (black base on firewall)
14) Do you get 12 volts at pin 30 (Brown/yellow) of the EMS
main relay base from fuse C1 in the left fuse box?
15) If yes, jump pin 30 (Brown/yellow) and pin 87
(White/brown) in EMS main relay base
16) Try this both with the ignition ON and the ignition OFF
17) Do you hear the fuel pump give its half-second priming
burst? [You can repeat this many times and you (or an
assistant listening at the open filler neck) should hear the
half-second 'whirr' of the pump every time you jump pins
30 and 87 of the EMS Main relay base]
18) If yes, suspect the EMS main relay OR the EMS ECU is
defective (the latter, very unlikely but possible)
19) Turn ignition OFF
20) Replace / re-fit EMS main relay
21) Remove Ignition 'ON' relay (on a '94 it should be in a
white base on the firewall but on a '93 it may be buried
under the dash behind the radio)
22) Do you have battery voltage at pin 30 (Brown) of the
Ignition 'ON' relay base?
23) If yes, temporarily jump pin 30 (Brown) and pin 87
(White/pink) in the Ignition 'ON' relay base
24) Do you hear the half-second priming burst from the pump
each time you jump those pins in the Ignition 'ON' relay base?
25) If yes, suspect the Ignition 'ON' relay is defective or
fuse A5 (fuse A3 on ‘94 models) in the left side fuse box -
but if either is defective, you will get NO dash lights when
you turn on the ignition.
26) If when you jump pins 30 and 87 of the Ignition ‘ON’
relay base you do get dash lights but you do not hear the
half-second priming burst from the fuel pump suspect the EMS
Main relay.


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Cheers,

Don

 

Could be the 'crappy' blue HELLA relays making poor contact??

Could be a fuel pump failing and burnt contacts in the EVAP flange??

Here is a TSB for the relay fault.

bob gauff