Canada - Engine - Engine Intermittently Runs Rough
BulletinTSB2804
Issue Date
October 15, 2010
Title
MIL "ON" DTC P030# AND/OR INTERMITTENTLY RUNS ROUGH
Component
ENGINE MECHANICAL
Models
'06-'10 IS250
INTRODUCTION:
Some 2006 - 2010 model year IS250 vehicles may exhibit one or more of the following conditions:
- MIL "ON" DTC P0300, P0301, P0302, P0303, P0304, P0305, and/or P0306.
- Runs rough after coming to a stop with the engine at operating temperature.
- Runs rough with engine misfires present after a cold soak startup.
Follow the procedures in this bulletin to address these conditions.
APPLICABILITY:
PRODUCTION CHANGE INFORMATION:
This TSB applies to vehicles produced BEFORE the Production Change Effective VIN shown.
WARRANTY INFORMATION:
PARTS INFORMATION:
REQUIRED TOOLS & EQUIPMENT:
INSPECTION PROCEDURE:
1. Confirm that the condition is applicable per the Introduction.
2. Perform misfire diagnosis.
Refer to the Repair Manual within E-TAS / TIS library
- Division: Lexus
- Model: IS250
- Year: 2006/ 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 4GR-FSE Engine Control System: SFI System: P0300-P0306: Random / Multiple Cylinder Misfire Detected
NOTE
Normal mechanical engine condition, engine control system, fuel supply/injection systems, and ignition system operation must be present or this TSB does NOT apply.
3. If the concern is NOT resolved after following the Repair Manual misfire diagnosis, proceed with the repair procedure.
REPAIR PROCEDURE:
HINT
For 2006 model year repair tips and specifications regarding assembly and disassembly, refer to TSB2342, "M.I.L. "ON" DTC P0300, P0301, P0302, P0303, P0304, P0305, or P0306".
NOTE
Each step must be carefully followed - Deviating from this procedure will compromise overall effectiveness.
1. Run the engine and bring to operating temperature.
2. Remove the intake air surge tank assembly.
3. Remove all ignition coils and spark plugs.
4. Remove the starter relay.
5. Using a funnel as necessary, pour 1.0 oz of AC Delco Upper Engine and Fuel Injector Cleaner (AC Delco P/N 88861804) into each of the 6 cylinders via the spark plug holes.
6. Place and secure shop towels over all the spark plug tubes.
7. Crank the engine for 5 seconds using a jumper wire (12 gauge) at the starter relay terminals 3 and 5.
NOTE
Cranking will assure even dispersal of top engine cleaner on the piston domes.
8. Let the engine soak for 60 minutes.
9. Spray a generic lubricant into each bore.
10. Rotate the crank pulley clockwise 2 rotations by hand to disperse the bore lubricant.
11. Crank the engine 5 seconds to redistribute the top engine cleaner.
12. Allow 1 additional hour of soak time prior to starting the engine; proceed with reassembly during the remainder of the soak period.
13. Remove any remaining top engine clean from the combustion chamber and spark plug tubes.
14. Reinstall the spark plugs and ignition coils.
15. Reinstall the intake air surge tank assembly.
16. Drain and refill the engine oil.
17. Start the engine and immediately test drive the vehicle for 15 minutes minimum.
NOTE
During the test drive, it is recommended to use lower gears and moderate throttle to operate the engine at an increased RPM. It is normal for smoke to be emitted from the exhaust during the first few minutes of operation
18. Change the engine oil and oil filter.
19. Using ETAS Techstream or Techstream LITE, clear any DTCs that may have set.
20. Confirm normal vehicle operation.
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.