Choke - Cold Engine Rich Loading At Idle

86chrysler4 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.

FIGURE 1:

7. Type Authorized Modification Label, PN 4275086, as shown in Figure 1 and attach near VECI label.
POLICY: Reimbursable within the provisions of the warranty


TIME ALLOWANCE:
Labor Operation No. 14-30-04-92 . . . . . . . . . . 0.2 Hrs.


FAILURE CODE: AM - Authorized Modification