Hello everyone, I have a 96 XJS 2+2, After driving for an hour or so, the engine begin to hesitate and shut down. It will try to restart, but it will not continue to run. If I wait for an hour or so it will restart and drive a shot distance. The longer the shut down and wait period, the greater the distance it will drive when it does restart. This is a recent problem. Has anyone had similar or same problem ? ? Any suggestion ? ? - Thanks

 

HapPAnn,

When did you last change the fuel filter?

Paul

 

I don't when it was last changed. I have not changed it since I purchase the car, last year. Thanks will look into that.

 

Yeah I agree a fuel filter should cure your problem. If not Ignition coil? or Ignition amplifier? But most likely fuel filter.
Hope it helps.

Jack

 

Thanks, I hope it is a fuel filter, a friend suggest that it might be the camshaft sensor, any opinions ? Knowing that anything is possible, I will be doing the fuel filter, easier, cheaper, and possible DIY project.

Thanks again

 

lf i where you i wouldn't over complicate it. As others have posted your symptoms sound like a fuel filter thats just about fully clogged up. Compounded by you not knowing how old it it is. Get it changed first.

 

Thanks again, the fuel filter is on the way, and everyone knows life can be complicated without my help, and does not need my hands stirring it up :-)
Thanks again

 

When you change the filter, crack the nuts on the filter ends before you undo the mount brackets. The filter pipe joints can be very tight so you want the filter to still be securely mounted when you're undoing them.

Good luck

Paul

 

Thanks, for making this easier and the insight

 

Today I replaced the fuel filter, and drove for approx 45 to 60 minutes and bang It started to shut off. I made it to an AutoZone where they read the codes. . . P0727 Engine speed sensor Circuit No Signal Coinfirmed & P1175 No DTC definition found. See Service Manual. Any suggestion ? ? ? Had it towed to my garage.

Thanks

 

Sounds like the Engine speed sensor or a problem with the wiring to it. Those sensor usually just die and stay dead. But occasionally they fail intermittently. Which is what it sounds like here. If it were a wiring issue? I would think it wouldn't want to run at all? But you never know. Good Luck

Jack

 

1. You may need to replace your EGR valve. I would, at minimum try cleaning it, but I’ve never had luck with that. When it starts to flake out a replacement was always the cure, however many people here swear that cleaning it with gasoline renewed its life.

2. I wonder if the TPS is starting to die on you? It’s a much more expensive part.

 

yikes, how many EGR’s have you lost. I replaced mine a long time ago. Do they just kind of go like the CPS?

 

This is classic crank position sensor behavior. Since you’re going to replace it, buy two. Keep a 10mm tool in the trunk with it because the reproductions just don’t last. When I was driving my 95 4.0 XJS daily, the sensor would last about one year. Probably replaced it six times. Tried every brand and they all (including factory Jaguar) appeared to be the same physical part... cheapest source I think is SNG Barratt.

 

That’s what I always say. The CPS IS a maintenance part..... I have been lucky mine don’t go bad in a year, but my car is not a daily driver either.

 

I had this issue on our AJ16 powered X300 sedan. It was a failed solder joint in the ECU. Heat over time causes expansion at the failed joint so it loses continuity and the engine shuts down. After a period of cool down, the joint regains continuity and the car starts and runs without issue until it dies again as heat rises.

There are services that reman/repair ECUs if that turns out to be your problem.

 

Both of the 96 XJSs I bought soon needed a new EGR.

The first one would shut the car off while driving. It eventually sent me a code identifying the EGR, but it took a while.

I knew what was happening with the second one, and didn't wait for the car to decide I was worthy of a specific EGR code.

I forgot which car had an attempt made to clean the EGR, but I don't recall being successful, so I bit the bullet and dropped the $80 or so dollars on a new one, which was easy to find at the local parts store.

 

Thanks for the input, I will be trying the the suggests shared, but I must say, "I am confused" What is the difference between the Camshaft Position Senor vs the Engine Speed Sensor?? With the P0727 code, it suggest Engine speed senor. Where did I get Camshaft Position Senor ? ? Is this the same thing, I received a rebuild kit for "Camshaft Engine Position Sensor". Is it a "speed sensor" or position sensor ? ?
Thanks again

 

HapPann,

I think you may have bought the wrong part.

The AJ16 has a Crankshaft Position Sensor, mounted above the timing cover at the front of the engine. A number of the suggestions that members have made relate to the replacement of this sensor which can cause problems with starting and running.

However, the AJ16 also has another sensor which is sometimes referred to as the Camshaft Position Sensor, although Jaguar usually refer to it as the Engine Position Sensor. This is to avoid confusion with the acronym CPS.which some people use to refer to the Crankshaft Position Sensor, although Jaguar usually call that the CKPS.

The Engine Position Sensor is mounted where the previous AJ6 engine used to have the distributor. A traditional distributor is not required on the coil-on-plug AJ16 engine.

The reason the Engine Position Sensor is fitted is because the Crankshaft Position Sensor can not tell the difference between the firing stroke on a piston and the exhaust stroke. Therefore, the Engine Position Sensor tells the ecu when the pistons are on the firing stroke and therefore enables the engine to start quicker rather than the ecu "guessing which stroke is the first firing stroke. The Engine Position Sensor is there only to enable a quicker starting process and does nothing once the engine has started.

Hope that helps

Paul

 

Thanks Paul for that explanation, since I already had the rebuild kit for the Engine Position Sensor (Camshaft Sensor) I removed it from the engine today. I hope I am able to rebuild it pending my skill level and tools. If you or anyone else have any advise I am all ears. I am also considering, ordering and replacing the Crankshaft Sensor. Seems like now would be a good time while the Camshaft sensor if off. I wanted to clean/replace the EKG valve, but I could not locate in on my car. Once again I am all ears to any suggestion.

Thanks again