Engine - No Start/Unsatisfactory Idle/Poor Driveability
310-06DATE 10/99
MODEL
1997 MY-ON XK8 Range
1998 MY-ON V8 XJ Series
VIN
001001-ON
812256-ON
Engine Non-start/Unsatisfactory Idle/Driveability - Carbon Deposits on Throttle Blade - Cleaning Procedure
Issue:
Some of XK8 and V8 XJ Series vehicles may experience a condition where the throttle body bore and throttle blade become coated with a soft sticky carbon deposit. This deposit may cause idle/driveability issues, particularly when the part load breather has become blocked. (See Technical Bulletin 600-03 Service Action S474).
Action:
In case of a customer complaint of non-start or idle/driveability issues on the above vehicles, clean throttle blade as follows:
1. Ensure that the ignition is OFF.
2. Remove intake duct from top of throttle body.
3. Using a suitable cleaning agent (see table below) spray the throttle bore and throttle blade. Do not remove throttle body to carry out this operation.
4. Allow to soak for 10 minutes.
5. Spray again and wipe away carbon deposits using a soft clean cloth.
Note:
There is a gray colored molybdenum coating on the throttle bore adjacent to the throttle blade. Use care not to remove this coating.
6. Open the throttle manually using the external linkage and inspect to ensure it is clean.
7. Operate the throttle using the external linkage to ensure that it operates smoothly.
8. Reinstall the intake duct.
SUITABLE CLEANING AGENTS:
MANUFACTURER BRAND
Valvoline Snypower
Pennzoil Gumout
BG Air Intake Cleaner
Mark V Carb Chem
Ford Carburetor tune-UPCleaner
Forte Carburetor Cleaner
Warranty Information:
FAULT R.O. TIME
CODE NUMBER DESCRIPTION ALLOWANCE
CD KF 69 19.91.52 Clean throttle body - XK8 0.25 hrs.
& V8 XJ Series