96 xj6 changed ecm fuel pump fuel filter positioing sensor and battery car is dead wont crank

WHAT MEANS FILER (FUEL FILLER CAP)? 33 years old.
ever see car run right in the last decade/( or?)_
OR TYPO FUEL FILTER.????????
gas engine? petrol? or what engine is there? 4.0L ?
okay i answer for filter hose (conn) pulled
well the electric pump only runs key on cranking(or running)

you never once told the story why you are here, dead engine?
no symptoms told at all, engine dead or stalls or engine weak or misfires.
engine dead:???????

1. engine pass compression test over 150PSI? on all/? 33yo !
2. spark good on all cylinders
3. now we test fuel not first. for sure relic cars like this. 300k miles on it?

the spare parts store tells me

2 Fuel Pumps may be Required - 1 Externally Mounted & 1 Mounted In Tank

learn this too, pump count. no just in the tank.
the external pump if fitted looks like this
seen connected to lines easy to see it; if there.



check it cranking
and 1990 car are hard to diagnose (no OBD2 yet)
most do have ECM and does flash codes. on demand.
covered in the manual
6 injectors to fail or the ECM does not want to fire them for many reasons, ask./
old old spark distributor bad cap/rotor 'wires sets and plugs .

What year? Inertia switch tripped. Fuel air spark compression. I have seen inerta switches plugs pulled out on the passenger side floor board many times. People's feet.

I would check for spark first,crank sensors are a normal fault on that car

crank position sensor issue. Notorious on these vehicles.

What you are telling me is the engine is firing the plugs but not getting fuel.
When you changed the fuel pump and filter, did you check the fuel pressure at the rail ?
Are the injectors getting power and ground pulse ??

If the passkey system were not working the engine should not crank and the fuel injectors would be dead. The security light would also stay on.
The fuel pump relay gets battery voltage and also voltage from the key switch. The computer grounds the relay to power the pump.
The crank sensor does not come into play until the engine is cranking and it supplies a signal for the ignition and injector pulse.
Are you not getting power from the key switch to the relay, or from the battery side to the relay ?

I have had the distributor rotor fail, leaving me stranded - twice. Not sure what can go wrong with them but replacing it was what it took to get it running again.

did you try testing the ecm or ignition module? try out those two for starters.

change your fuel filter. re-test

In a HOT day,old battery and fuel pump will be the prime troublemaker.

You need to charge up the battery and check for 12.4-13.6V range.

How old is the battery?

Most are warrenty for 24,48 or 96 months.

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Fuel pump motor portion will ran forever. But the plastic diaphragm will give out in a hot day.

Do a fuel injector pressure test. Below 40 pis is trouble.

Fuel filter should be change if the fuel pump is at fault.


ALL more gas until it's over 1/2 tank and re-test.

A weak fuel pump will take more effort to pull fuel from a near empty tank.

Good luck,