My recently acquired 03 STR has a catastrophic run-ability issue with massive multi-cylinder misfire which resulted in multiple codes being registered on the (very) short diagnostic drive.

After consulting with a few Jaguar knowledgeable friends we came to the conclusion that it was likely one of the cam position sensors preventing the coils from knowing when to fire. Makes sense.

Since the left side CPS is much easier to get to than the right, I decided that was a great place to start. After releasing the electrical plug and removing the retaining bracket I pulled the sensor out, but only half of it came out.

It appears the CPS actually is the problem since it was cracked and had internal corrosion of the wires.

My current problem is figuring how to get half a broken CPS out of the head. My long needle nose pliers aren't able to get enough of a bite on the tiny fragment of wire left behind. Prying it out with a jewelers screwdriver hasn't worked either.

Any suggestions that I haven't tried or though of? I'd sure like to get this thing running ASAP.

 

Pull the cam cover and PUSH it out!!!!!!!!!!

bob

 

Thanks for the tip, Bob. I didn't realize that your could get to it from the inside. I will pull the cam cover and let you know how it goes.

 

Thanks again @motorcarman. After removing the cam cover I was able to pop it right out.

 

Well, thanks to @motorcarman, the CPS replacement went rather well. Also installed new plugs and cam cover gasket set while completing the job. The car hadn't been started in 7 months so I was pleased when it fired right up.

The downside is that it is still running rough with a misfire and the restricted performance notification on the dash. My code reader only had 2 codes this time: P1368 (Confirmed) and P1000 (Pending). Both of these are undefined trouble codes that say: See service manual.

Does anyone have experience with these codes that they can share?

 

A bit of research suggests that P1000 isn't a concern since I have had both, the battery out and have recently cleared the codes. I suspect that once the issue is resolved and the car is driven long enough for a full cycle to occur P1000 will go away.

P1368 is a bit more serious. There are several potential causes, but it appears to frequently be one of the ignition control modules. Now - if I can just figure out where to find it...

 

DTC guide for you.


The ignition modules are part of the on-plug coil itself. (See Electrical Guide S2003_STYPE.pdf)
The file is near 5mb in size so you will have to download from somewhere like Gus's site.

bob

 

Get the free downloads such as the workshop manual that has all the codes and troubleshooting for them.

P1638 isn't as posted... so look it up...

 

GOLD! I'm going to have to drive to Decatur and buy you a Lone Star.

 

If you go to jagrepair.com and download the manual etc. Or the JTIS from the stickies.

 

I've looked up P1368 which indicates Bank 2 Ignition Module. Can you please elaborate on what you mean by, "Isn't as posted"? Which source is correct and what is the right answer?

 

P1368 EMS EOBD Ignition amplifier bank 2 fault Start engine Battery voltage > 12 volts Idle for 2 minutes

2 A ECM Default:– Closed loop fuel metering inhibited– Adaptive fuel metering inhibited– Catalyst warm up ignition retard inhibited– EGR Inhibited (V8)– Canister purge inhibited– Maximum engine speed reduced– Fuel injection cut off (bank 2 cylinders) PI1-132 Ignition monitoring circuit between splice and ECM: open circuit, short circuit to ground, short circuit to B+ voltage Ignition module / coil bank 2 ground circuit

have you downloaded the pdf workshop manual here at jagrepair.com.
http://www.jagrepair.com/images/AutoRepairPhotos/CarPDFFiles/SType/S-Type%202002.5-2008-FSM-Workshop.pdf.
then do a search for the code I found 12 references to this code along with how to diagnose the fault.

 

Apologies! I misread it as P1638 (as I posted).

 

I've been able to return to the garage to attempt swapping out my (hopefully) bad ICM responsible for the horrible misfire and trouble code P1368. I was able to find the PCM under the dash in the RH footwell. I can't seem to find the bank 2 ICM though. I've downloaded the workshop manual and electrical guide but still can't find the ICM. Can anyone point me in the right direction?


PCM beneath the dash in RH footwell Reason for Editing:

 

July 24 I advised that the control modules are integral.

Figure 03.6 (Engine Management: V8 SC – Part 2) clearly states above the On-Plug Coils "IGNITION MODULES AND COILS" as stated above.

The ECM directly commands the 4-pin coils. 2-pin coils need an additional ignition control module.

bob

 

I suppose reading so much information leaves me with more questions than answers. Mine has the 4-pin coil caps so apparently there isn't a separate ICM.

Do you suppose that the all or the majority of the LH (Bank 2) coil caps would fail together? Not impossible, but seems quite odd.

 

It's unlikely, a wiring fault would be more plausible.

 

Now I've started the car and let it run for a few minutes to warm up and there are now 12 trouble codes:
P0300 Random Multiple Misfire
P0303 CYL 3 Misfire
P0304 CYL 4 Misfire
P1316 Misfire Excess Emmission
P0102 Mass Airflow Sensor
P0112 Intake Air Temp Sensor
P0352 Coil B
P0353 Coil C
P0355 Coil E
P0358 Coil H
P1368 Ignition Amplifier Bank 2
P1000 OBD Check Incomplete Since Last Clearing

I'm completely baffled.

 

Wiring/power/ground/battery/...

Go hunting.

 

Cylinders 3 & 4 are both the 2nd cylinders from the front on each side.

If you move those 2 on-plug coils to another location, the fault will follow the coils if they are faulty.
If the fault remains with those cylinders, I would suspect wiring/connector or module problems.

keep diagnosing.

bob