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PB 150 V8-318 5.2L VIN T 2-BBL (1983)

Powertrain Management > Fuel Delivery and Air Induction > Idle Speed > System Information > Technical Service Bulletins > All Technical Service Bulletins for Idle Speed: > Page 1856

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Carburetor - Cold Engine Lope/Black Smoke

Models

1983 318-4BBL Heavy Duty Trucks, Automatic & Manual Transmission, Federal & California Systems

Subject

Cold Rich Loading

Index

FUEL

Date September 26, 1983

No.

14-38-83

P-3573-C
SYMPTOM/CONDITION

After starting the engine cold the engine will start loping and emit black smoke from the tailpipe at idle and under load.

PARTS REOUIRED

1 - Authorized Modification Label

PN 4275086

REPAIR PROCEDURE

1.

Reset choke vacuum kick adjustment from .130" to .170" using the procedure outlined in the service manual.

2.

Check and reset if necessary the hot fast idle speed.. Adjust to specification of 1800 rpm on Step 2 of fast idle cam using procedure outlined in the
service manual.

FIGURE 1

3.

Type the following information on the Authorized Modification Label PN 4275086 (Figure 1).

Lower Section:

Change Authority - TSB #14-38-83.

Dealer Code - Your dealer code.

Date - Date this procedure is performed.

Powertrain Management > Fuel Delivery and Air Induction > Idle Speed > System Information > Technical Service Bulletins > All Technical Service Bulletins for Idle Speed: > Page 1856

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