Has anyone had any experience with this item and/or any opinions or even gossip??




Thanks

Tom in Dallas/Plano
2005 S-Type 3.0 87K

 

 

That is my initial reaction as well. However, I have had it with this mild tremor (not even a rough idle) at idle and understand this things alters the air/fuel mixture and frankly in an older car, if you could adjust the rpm by up 50- it would stop and wondered if this would do the trick??

However I can find no testing data in it and was a bit curious as to it working or not?

Thanks

Tom

 

Sigh.

It messes with OBD inputs. You'd do better by far to look at them and the outputs (much cheaper) and figure what's wrong. All this thing does is tweak them, not fix them, so you'll at best just nudge the fault(s) not fix it/them.

 

Understand that, however I have nothing to fix except to throw parts at it and guess.. Again here my posting- you tell me.


Lets see if anyone has any thoughts.

First I have no codes beyond an older occasional over voltage on bank 2 sensor 2 O2 sensor that is now replaced and problem solved.

I have a slight rough idle or slight tremor when I am in idle that I never had before. It happens when I engage the compressor or not (which is new from May 2012). If I put in neutral it is almost gone. I always am the worry wort about small issues that may morph into larger ones.

From a data standpoint my fuel trims at idle and 2500 and in general driving will tend to be Short Term on idle from about +2.3 to - 2.0 and LT% about +1 to -2. At 2500 (and general driving) LT are +.o8 on one and -.08 on the other- Clearly no problem with lean or rich conditions.
My rpm at idle are about 785 and when I engage drive and the compressor will drop to about 705 and run between 695 to 725. I do not know if this is normal or not?

In the past 7 months I have done the following.
1. Replaced all coils and plugs- using Denso/Jag coils and the NTK iridium
2. I replace the air filter every 3 month no matter what.
3. I clean the MAF once a month
4. New cats both sides
5. New O2 (Denso) sensors upstream/downstream both sides.
6. New PCV valve
7. New gas filter
8. Have looked to clean and did slightly the throttle bottle, but is was not really dirty in any way except for a few small areas of slight discoloration.
9. New AGM battery
10. New serpentine belt

Everything works fine, no ac problems in cooling or noise from compressor. Engine sounds quiet and the same as always.

No engine mount problems.

I use only Shell Premium
I have used at Gus's suggestion the BK (no change I could tell).

So what gives. I have been told by one of the Jag dealers (but I trust them not at all) that these cars do not like the ethanol in the gas and it causes problems for them- so I tried an ethanol stabilizers or whatever they call it and that changed nothing.

Could it be a small problem with the throttle position sensor, although everything else indicates the throttle is fine and everything in the car is smooth on acceleration at full load from 0 to about 125 mph before I pulled it back.

I have reset the battery/ erased my P1111 after I replaced the O2 sensor- so relearning to see if any change. This was done months ago and zero codes have showed.

Suggestions and creative thoughts appreciated.

Tom in Dallas/Plano
2005 S-Type 3.0 84K

 

You're going to need IDS I suspect. Then I'd look around at data available and particularly misfire counts.

Better would be a jag tech.

A "chip" is just a waste of money. Not only that but the PCM is liable rapidly to adjust to counteract the perturbation the "chip" causes.

 

I will give you the car before going to a Jag dealership in Dallas. I have had a guy that was a certified Jag tech that had the backdoor IDS software ect and found nothing out of order in misfire counts. That is why this is so hard to figure, unless over the use of 87k that something in the engine has alter a few mm. and is causing this activity. Other than the slight tremor there is nothing else to indicate a problem of any nature.

Are you, on the other hand, aware of any scanners that i can buy that would show the "backdoor" on the Jags. I have a friend that has a Lexus 2004 LS 430 and my scanner will show his cat temps, misfires and a host of other things- interesting!

Tom

 

There's a scanner called the iCarsoft i930 programmed exclusively for Jaguar/Landrover. It sells on amazon.com for about $136. The reviews I've read are mixed. I'm looking for forum members who have used this scanner so I can discuss the pros and cons before deciding whether or not to buy one. Thus far no one has responded to my request for input....

 

I am also curious. I called their number, bit got a vm. I did write them with some specific questions and will relay the response.

Tom In Plano/Dallas

 

see attached

Tom

 

Says who?

 

comes from their web site:

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