Impulse L4-1994cc 2.0L (1985)
Engine Control Module: All Technical Service Bulletins
Engine - Lean Stumble
BULLETIN NUMBER
ISSUE DATE
GROUP
SB86-02-007
September 19, 1986
FUEL
VEHICLES AFFECTED
1983 - 1986 Impulse (JR) non-turbocharged models before VIN G0908372 (production date June 1986).
SERVICE INFORMATION
Affected vehicles may exhibit a lean stumble caused by a build-up of fuel/combustion deposits in the induction system. Under certain circumstances, the
installation of a recalibrated I-TEC controller may reduce or eliminate this condition.
SERVICE PROCEDURE
1.
Determine if the specific vehicle meets the following conditions:
a.
The fuel injectors have been tested and cleaned according to Service Bulletin SB86-02-005.
b.
If the condition exists during cold operation, verify that a revised EGR thermal vacuum valve has been installed. Refer to Service Bulletin
SB86-03- 001.
c.
Vehicle odometer reading is greater than 8,000 miles.
2.
If the vehicle meets these conditions, install an Ftype I-TEC controller as described in the appropriate Workshop Manual.
CAUTION
Do not clean the cylinder head or induction system at the time the F-type I-TEC controller is installed. If the engine is cleaned at a later date (for
example, during a valve job), an E2-type controller (part No. 8- 94404-150-0) must be installed.
PARTS INFORMATION
Part No.
Description
8-94430-370-0
I-TEC Control Unit, F-type
(Federal Manual and Automatic; Calif. Manual Transmission)
8-94430-371-0
I-TEC Control Unit, F-type
(Calif. Automatic Transmission)