Thanks again, Don

There is a Dec. 10, 2010 letter from Jaguar that talks about this. It states that when the comprehensive component will not set, the most likely cause is failure to run the .02" evap leak test. It gives a drive cycle to cause the .02" test to run. It looks to me like this is the same cycle that SilverXKR03 is describing in his post below in this thread. I've been trying that drive cycle but it has not done the trick so far. That's what led to my questions.

My scanner can read only basic codes.

All of this is like a bad dream. I've been through it at least twice before, and when the comprehensive component finally did set in those cases, I was never sure what caused it.

 

Are you not allowed any unset monitors? That would be unusual.

Also, do you have pending codes (besides P1000)?

 

JagV8,

New Jersey. No leeway on unset monitors. Grrrrr.

P1000 only.

Thanks.

 

If you have that letter in pdf form I would be grateful if you could post it so the rest of us can be sure we have it in our libraries.

Cheers,

Don

 

I have only hard copy, but I'll try to take some usable photos of the pages and post those. I wonder if anyone else here might have a PDF ??

 

May be this one?

BTW web searches imply NJ do allow unset monitor(s) depending on car age, though not everything on the net is true!

 

JagV8,

Yes sir, that's the document in question.

NJ does not allow unset monitors on my '03 xk8. I've tried appealing to the state dep people but no help.

 

Dennis,

Best of luck in getting this frustrating situation resolved. Keep us posted on your progress....

I am also trying to resolve an evaporative emissions system issue in my wife's 2006 XK8 that just popped up on Monday. I know next to nothing about these systems but as always, our expert forum members have been extremely helpful with their troubleshooting recommendations....

 

JagV8,

Thank you for posting the TSB!

Dennis,

From a quick scan of the TSB, it appears that the official drive cycle may be a little more involved than the summary that silverXKR03 posted, so it might be worth following the TSB to the letter, including fuel level, ambient air temperature and barometric pressure, and avoiding fuel slosh.

One common cause of the 0.020 inch test not completing is a leaking gas cap seal. Might be worth replacing your cap with a genuine one from Jaguar (we haven't had good luck with aftermarket caps from the auto parts stores).

Cheers,

Don

 

Thanks, Don

Yes, I've been trying to follow all the details in the TSB. New Jaguar gas cap.

If the .02" monitor test runs, it seems to me it should either flip to comprehensive component to "ready" (pass) or throw a P0456 fault code (fail). Since neither of these is happening it seems likely the test is not running.

One aspect of the TSB that seems fuzzy to me ... after the .04" test has run (we have to assume it did if we meet the TSB's driving requirements), how are supposed to enter the .02" test phase? I've tried coming to a full stop first, then letting the car creep along as SilverXKR03 described. I've tried not coming to full stop first. Does it matter? Some other aspect I'm missing? I'd appreciate any thoughts anyone might have.

 

Have you tried coming to a full stop and just idling for a few minutes? From my quick reading of the TSB it didn't seem clear that the vehicle has to be moving at less than 2 mph and could in fact, be stopped and idling. Did I misunderstand?

 

My head is so fuzzy now on this that I'm not sure if I tried it. So I will. But I'm thinking, the guy writing up the procedure ... if he wanted us to stop it would have been easier just to say so rather than to say "less than 2 mph". Who the bleep knows?

 

Sorry I just noticed this post, would have responded sooner.

I too struggled for months.

Do the following

Start the car from cold it needs to run for 12 minutes 45 seconds before starting the test. You can let it sit and idle for this time, just make sure it gets to normal operating temp. You could also drive it carefully trying not to slosh the gas around too much. Once you have your normal operating temp car (started from cold) run for at least 12 minutes 45 seconds drive it at a steady speed for 50 seconds (8-50 miles per hour) i kept at 35 for 50 seconds. come to a steady stop. This completes phase one. You need to start phase to now. With the car at idle let your foot off the brake and let the car crawl along at it's own pace for 66 seconds. Just letting it idle will not work. You need to be moving in drive, it will not go over 2 miles per hour. Pick a spot where you can do it without the need to brake. Once you have 66 seconds in you should be good and you can stop the car. Hope this is a little clearer than last post

Good luck!!


12 min 45 second

 

Silver,

Thanks for the post. I feel as though I have done what you described, more than once, but clearly I must be missing something. Do you have a feel for how sensitive the procedure is to fuel "sloshing"? The roads here are not the smoothest and straightest. Could that be my problem?

Thanks,

 

Dennis,

You want to keep it as smooth as you can for the first phase but doesn't have to be perfect just no sharp swerves or turns. When doing the second part you are going so slow road surface shouldn't matter too much, avoid pot holes obviously.

Also both phases have to be completed within 1 hour and 24 minutes from initial start up, which I am sure you are doing.

Are you in NJ?

 

Yes, NW part of the state. Very rural here, which surprises a lot of people.

 

I was going to offer some assistance, i'm in Bergen County.

 

I see. Visiting or there permanently? I'll give it a couple more goes over the weekend, and then if still no joy I will try to take you up on your generous offer.

 

I live here now, need to change profile. Originally from UK. Spent a bunch of years down south. Let me know how you get on.

 

Silver,

I see. Glad to have you as a neighbor.

No luck this AM. The only possible deviation from plan that I can think of was a bit of a pot hole during the < 2mph phase (like an idiot I got preoccupied watching the scanner to see if comprehensive component would flip).

Question: Would you happen to know ... If a first attempt for the day fails, it there any point in trying again without shutting off the engine or is the system sort of locked out after a failed attempt until ... the next start? the next cold start? I understand about the 1 hr 24 min limit.

Thanks for your interest.