Of the 45 cars I have owned, foreign (non US) and domestic, the European cars seem more affected by battery age and dodgy grounds. That said, the use of computerized systems by Jaguar in conjunction with "dodgy" engineering and poor quality parts has created an almost unbearable combination. If you can't do it like the Japanese, don't do it. I have a feeling at times that a paint chip might cause the car to go into RP mode. Of course the code would be unrelated and cause me to chase unicorns until I've changed all coil packs, MAP sensor, batteries, plugs , injectors, wiring, door insulation, tensioners, assured uniform tire pressure and a full respray. At which point the RP light would extinguish for a day and the process would then repeat itself. My wifes ES300 shows 150K and all I do is change the oil, timing belt and brake pads. Never once have we had to "Limp Home". I waited 50 years to get a car I've always wanted and it has, in one year, proven all the cliches. I love the British, but they should outsource cooking, car building and dentistry. Just design bodywork.

 

I agree with Sean. If you are happy with a Toyota, it is utterly foolish to own a Jaguar. And if Ford is the problem, why are Fords typically reliable and without these snigglies?
Toyotas electronics are not without blemish, either BTW. Although I believe it is BS, there are many "known" cases of sudden acceleration and brake loss here in the US.
I love to read other opinions, but I think in this case you are missing the point, billy.

 

Cool it with the personal attacks! Jaguar is unique in many ways and I enjoy working on my cars. But what I say is true and of the 45 or so cars I've owned and maintained, including 5 Mercedes, 4 Audi, 2 Porsche, 1 VW, 1 Rover, 2 Fiat, 3 Mustangs, 1 Charger, 3 Honda, 1 Acura, 3 Lexus, 2 Pontiac, 1 240Z, 1 300ZX, 1 Delorean, 1 630CSI, 1 Chevelle, 3 Isuzu, 2 Jeeps, 1 Maxima, few gave me more pleasure to look at than the XKR. None of my Lexus or Audis ever suffered from "Unintended Acceleration" and nothing I owned other than a 78 Searay Express frustrated me more than the Jag and maybe the Rover. At 68 this will probably be my last special interest car. Now lets cut the personal jabs and find a way to make these better vehicles.

 

Excalibur:
What do you mean "no personal attack"? I disagreed with his basic premises, but I enjoy reading views counter to mine. BUT, to compare any Toyota with a Jaguar does miss the point by your very statement " few gave me more pleasure to look at than the XKR".
If you want good, cost effective transportation, with good reliability, a Jaguar is a terrible choice. And while I probably have as many cars, with as much diversity, in my list as you, six of them are Jaguars.

 

I was referring to the condescension. Lets start over if your willing. I value your Jag experience.

Here is where we are:

Car runs well for 15 minutes or so when started cold. Restart once hot shows RP and misses. Primary codes have narrowed it down to PO306 which is a #6 Misfire and a PO356 which points to Coil F Pri/Sec Circuit Fail. If the count starts on the RH then F would again be #6. I'm making an assumption that I have a bad coil pack, plug or wiring on #6. Seem logical?

 

That sounds like a very reasonable analysis. Note the confusion of Jaguar cyclinder numbering! AFAIK, most code readers use the single cylinder number convention no matter what year. I would swap the #6 coil with #2 (because it is far away in firing order, but the same side of the engine), reset codes and make sure the code follows to the new position..
BTW, what MY X-308 are we talking about. Neither of my charts shows a P0316.

Oh, and by the way, the Jag engineers have made SOME progress. The belts and hoses don't wear out in a year anymore, and most of the fluid leaks characteristic of a Jag have gone away!

 

Good advice! Not sure why the numbering system for cylinders should be so complex. Even a R4360 Radial with 4 banks of cylinders still labeled them 1 thru 28. Glad most leaks are gone but still have that pinion seal situation at the rear. No current dripping but evidence of an old seeping. When I "finally" gained access and serviced it it took 22 oz.

BTW the site where I got my fault code list was the German online Jaguar Club Jaguar Online Club: OBDII Fault Codes

 

Actually, P0351 thru P0358 are "Ignition Coil X Primary/Secondary Circuit Malfunction", where X is A-H ( or 1 thru 8). Which basically means you might have a bad coil. To me, the cylinders are numbered logically, 1 - 4 front to back RH side, 5 - 8 front to back LH side (from driver's seat). I agreee with the advice from Sparkenzap. I'm getting to be quite the old coot myself with a long list of exes (cars and wives), the cars are a lot cheaper in the long run.

 

You were right to question my codes. Not sure where my head was when entering and not sure where the PO316 came from. I originally had a PO306 which is a #6 Misfire and a PO356 which is a Coil F Pri/Sec Circuit Fail, both pointing to #6 Coil. I have since gone back in and edited my posting.

Erased codes and swapped pack 6 for 2 this morning. Started from cold and car ran great for 15 minutes then went into RP mode and started missing once stopped in driveway. Only code is now PO356 (Coil F Pri/Sec Circuit Fail ) which seems to indicate a wiring problem on #6.

 

Jimmy,

I'm just referring to the fact that there should be no reason to refer to a location as B2 for #4 and a Coil position as F when we are talking about Cylinder #4 and Coil #6. Most of my cars were Pre 96 or newer ones that didn't have problems requiring a scanner. Is this something that happened when they started using OBD Codes?

BTW are you any relation to driver Katherine Legge

Al

 

I had never heard of Katherine Legge, but it was very interesting to read about her. Nice looking too. Too bad she drivers for Audi ! I agree about the B2 and F stuff. I still think in terms of 1 thru 8.

 

Jimmy,

The only reason I know of her is that I live in Elkhart Lake (Road America) She drove at Indy this year. Take a look at this:

Al

 

This is the kind of confusion the numbering system creates. https://www.jaguarforums.com/forum/x...problem-25516/
Same codes and he is saying a it's B2 or Cylinder #4.

 

Yep, just another of the Jaguar "secret codes"!

 

Well frankly...I agree with Sean on this.

If Toyota had gotten their greasy corporate mits on Jaguar, they would have dumbed them down to a grey bowl of porridge and they would have faded from the market.
At least in many ways Ford taught Jaguar how to build cars efficiently and quality control leaped ahead.

TATA came along at just the right time with the right idea to let Jaguar be themselves and are now reaping the benefits.... and we see a magnificent company storm ahead into the next decade ;o))

 

Ford brought mass production technique and it shown in the quality of materials, instrumentation , etc. Pure Ford at 80 grand. Some improvement in the quality of electrics but not enough and then after years of Ford producing incredibly reliable engines we are presented with the AJ V8. Using your customers as a test bed is just wrong. If everything is so wonderful, why Tata? What the hell is this legendary aversion to reliability? Not sure Lyons envisioned that.

 

We could argue ad infinitum but I would like to get back to the original subject.

The swapping of coil packs and additional testing seems to indicate that I have a problem in the wiring or connectors for # 6 Coil Pack not the pack itself. (codes PO306 & PO356 after swapping it with pack #2)) That said, is there a specific common area of concern I should look at next?

 

OK let’s start over! Give us your problem as if you had not posted it before.

 

Car runs well for 15 minutes or so when started cold. Restart once hot shows RP and misses. Primary codes have narrowed it down to PO306 which is a #6 Misfire on a code chart at the German online Jaguar site and a PO356 which points to Coil F Pri/Sec Circuit Fail. If the count starts on the RH then F would again be #6. I'm making an assumption that I have a bad coil pack, plug or wiring on #6. Swapped #6 & #2 Coil packs and performed as before this time showing a PO306 code only.

 

OK, I bet you have the wrong cylinder. The chart I posted shows a different #6 than Jimmy L's post FOR THE NEW NUMBER SCHEME. His post implies a1,a2, a3 and a4 are numbers 1,2,3,4 and b1, b2, b3,b4 are 5,6,7,8. So, his method has #6 as the second back on the left side, but the chart FOR 2002.5+ shows the third one back on the left side. I am pretty sure P306 refers to cylider B2, which is the second back on the left (US driver's )side.