Hi,

I have a question re. my vehicle has a high idle (around 11-1200rpm) just noticed this yesterday. Nothing changed on the vehicle other than had the coolant topped up at the local drive thru oil change; the guy did look at the air box I told him the filter was good as I just changed it last month.
Is this a normal occurrence or some ominous problem waiting to pounce after I buy new tires?

Thanks

 

The car will go to a high idle after the battery is disconnected but will return to normal shortly.

Considering the comment about the air filter check I suspect that the filter box/throttle body duct was not replaced correctly. Do you have a CEL?

 

+1

Check for air leaks.

The engine does have a high idle on initial startup and this drops back after a couple of minutes as the temp rises.

Graham

 

I hope that they used the correct type?
As if you mix the wrong types you can end up with gel like substance forming! You could end up with poor cooling, can be very bad news on this car!

 

Thanks for the response guys. Coolant was orange long life. I did recently disconnect the battery. No CEL.

Just got in from a drive and idle seems to back to normal. Hope it stays that way!!

 

Good news on the coolant.

There is a learning procedure for the idle, if battery has been disconnected for a length of time or reset.

Bring the engine up to temperature.
Switch off.
Restart and leave to idle for 2 minutes in P.
Then select D and keeping your foot on the brake, leave to idle for another 2 minutes.
Reselect P and switch off. Setup complete.

This sets the idle mixture and rpm.

 

Originally Posted by Red1bw on the huge 'throttle cable' thread
After resetting Throttle Body Cable I would think one then would need to reset the following:

Resetting kickdown travel limits
After battery reconnection, the engine management
system must ‘re-learn’ the limits of throttle pedal travel.
This is to ensure correct adaptive settings are stored for
kickdown operation. Re-programming is done with the
ignition switch in position II a follows:
• Slowly press the accelerator pedal fully through the
kickdown detent to the floor. Release the pedal and
repeat the action.
Derek,
Red1bw quoted this from a Jaguar publication for 2004 XK series.
I've not seen a reference to this previously but perhaps we should do this as wel as the tickover calibration?

 

JTIS details the steps involved in battery reconnection:

JTIS - 2003 XK8 Battery Reconnection.pdf

Also includes 5 miles of varied driving to enable the ECM to complete its learning strategy.

So that's:

1. window limit reset
2. audio preset reset
3. clock reset
4. Idle reset
5. Kickdown limits
6. Drive Cycle

all to be completed following a battery disconnection!

Graham

 

Graham, there's nothing there about WOT calibration.
Red1BW says
Source was PDI for 2004 XK series, page 4. Probably applicable for all 4.2 XK's 2003-2006.
Have you got a copy by any chance?

 

YES - but it's over 8mB so I've put it on my MediaFire account. Here's the link to download it:

Free Cloud Storage - MediaFire

Covers all 4.2 Models to Final Series.

It's a much more detailed inspection procedure than for the earlier 4.0 litre models. There's a corresponding Check Sheet. Let me know if you want a copy.

Graham

 

Thanks for that Graham.

I knew I had read it somewhere, but for some reason I stated it was pressed 5 times, in an answer on another thread.

Reads most strange when viewed on the link site but is OK when downloaded.

If I remember correctly that info is somewhere on JTIS?

 

Derek,

The PDF came from JDHT originally but I've checked JTIS and your memory is correct, it's available under the PDI button.

Strangely, the only PDI manual in JTIS is for 2003 and 2004 Model Years which brings up the same document.

Graham