EGR Valve - Diagnostic Procedures Revision

89chrysler12

Models

1987-88 E, G, H, J, L, P, K & S Bodies And 1989 AA, AC, AG, AH, AJ, AK, AL, AP & AS Bodies


Subject

Revised EGR Valve Diagnostic Procedures


Index

DRIVEABILITY


Date September 18, 1989


No.

25-01-89

(C25-01-9)

P-3378
BODY CODE LEGEND

E - CARAVELLE/600/NEW YORKER TURBO
AA - SPIRIT/ACCLAIM
AC - DYNASTY/NEW YORKER/LANDAU
G/AG - DAYTONA H/AH - LANCER/LeBARON GTS (4-DOOR HATCHBACK) J/AJ - LeBARON L/AL - OMNI/HORIZON P/AP - SHADOW/SUNDANCE K/AK - ARIES/RELIANT S/AS - CARAVAN/VOYAGER/CARAVAN C/V/TOWN & COUNTRY


SYMPTOM/CONDITION

This Technical Service Bulletin contains a revised diagnostic procedure for testing EGR valves for a leaking poppet.

The procedure applies only to vehicles equipped with a back pressure transducer. The procedure allows the EGR valve to be tested without removing the valve from the vehicle.

PROCEDURE

1. Turn engine off. Remove the air cleaner exposing the inlet of the throttle body. On 2.5L Turbo I (California emissions equipped vehicles), remove the compressor outlet hose at the throttle body.

2. Disconnect the back pressure hose from the EGR valve.

3. Using a nozzle with a rubber grommet connection, direct compressed shop air (regulated to 50-60 Psi) through the steel back pressure tube on the EGR valve while opening and closing the throttle blade.
4. If the sound from the compressed air changes distinctly while opening and closing the throttle, the poppet is leaking and air is entering the intake manifold. Replace the EGR valve.


POLICY: For information only.