Sundance L4-135 2.2L SOHC (1987)
Choke Pull-off: All Technical Service Bulletins
Choke - Cold Engine Rich Loading At Idle
Models
Late 1986 & 1987 Passenger Cars Equipped With a 2.2L Engine With Carburetor PN 4324690 or PN 4324691
Subject
Cold Engine Rich Loading at Idle
Index
DRIVEABILITY
Date
October 20, 1986
No.
18-47-86
P-3778
SYMPTOM/CONDITION
A rough cold engine idle may be caused by an overly rich condition. The vehicle may exhibit black smoke out of the tailpipe.
PARTS REQUIRED
1
Authorized Modification Label
PN 4275086
REPAIR PROCEDURE
This procedure is to reset the choke vacuum kick from .070" to .085".
1.
Open throttle, close choke, then close throttle to trap fast idle system at closed choke condition.
2.
Disconnect vacuum hose from carburetor and replace with hose from auxiliary vacuum source. Apply a vacuum of 15 or more inches of mercury.
3.
Apply sufficient closing force to position choke valve at smallest opening possible without distorting linkage system. An internal spring will
compress to a stop inside choke system.
4.
Measure by inserting drill or gauge in center of area between top of choke valve and air horn wall at primary throttle end of carburetor. New
specification is .085".
5.
Adjust by rotating allen head screw in center of diaphragm housing.
6.
Replace vacuum hose on carburetor fitting.
