Colt Wagon 2WD L4-1468cc 1.5L SOHC (1989)
Air Flow Meter/Sensor: Customer Interest
Valve Cover - Cold Start Driveability Problems
NO.: 18-14-91
GROUP:
DRIVEABILITY
DATE:
Nov. 18, 1991
SUBJECT:
Hesitation/Surge/Stumble or Driveway Dieout After Cold Start - Surge at Highway Speeds at Operating Temperature
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-28-90 WHICH SHOULD BE REMOVED FROM YOUR FILES. THE
REVISIONS ARE HIGHLIGHTED IN RED AND >> ARROWS <<.
MODELS:
1989-90 (B2) >> "LC" << COLT
>> SYMPTOM/CONDITION <<
Vehicles equipped with a 1.5L engine and an automatic transaxle, may exhibit a hesitation, surge, stumble, or driveway dieout within the first 60 seconds
after a cold start. Vehicles equipped with a manual transaxle may exhibit a surge condition, with engine at full operating temperature, while driving at a
steady speed.
NOTE:
VEHICLES EQUIPPED WITH AN AUTOMATIC TRANSAXLE EXHIBITING A SURGE AT 45-55 MPH SHOULD HAVE
TECHNICAL SERVICE BULLETIN 18-19-90 PERFORMED.
DIAGNOSIS:
Verify the vehicle is functioning as designed using the DRB II, and the appropriate Diagnostic Test Procedure. If no problems are found, perform the
repair procedure.
PARTS REQUIRED:
1
Cylinder Head Cover
MD168907
REPAIR PROCEDURE:
This repair involves cleaning several engine components of oil and carbon deposits, and the installation of a new style valve cover.
Figure 1
1.
Confirm the air flow sensor identification number (E5T01571) as marked on the side of the-air flow sensor (Figure 1). Inspect the air passage of
the sensor and verify that one of the air by-pass holes are plugged. If both of the by-pass holes are open, the air flow sensor must be replaced using
the correct sensor, PN MD118125.
