SL L4-1.9L SOHC VIN 9 (1991)
Technical Service Bulletin # 91-T-35B
Date: 931101
Engine - Stalls After Start
No: 91-T-35B
DATE: November, 1993
GROUP: Engine
CORP. NO.: 186301R
SUBJECT:
Engine Stalls after Start, SOHC (LKO) Engines (Clean TBI Unit, Replace TBI Gasket or Install New PCM Calibration)
Due to the following revisions, this bulletin supercedes bulletin 91-T-35A, which should be discarded.
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Addition of 1993 and 1994 vehicles
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Removal of faulty intake manifold casting surface inspection procedure
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Revisions to diagnostic charts to simplify procedures
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Fuel pressure specification changes in diagnostic charts
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Removal of some service part numbers
MODELS AFFECTED:
1991-1994 Saturns equipped with SOHC (LKO) Engines.
CONDITION:
Some owners of 1991-94 Saturns equipped with SOHC (LKO) engines may experience one or more of the following conditions:
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If the vehicle is equipped with an automatic transaxle, the engine may stall after the vehicle is initially started, or stalls or stumbles when first shifted
into gear.
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If the vehicle is equipped with a manual transaxle, the engine may stall after the vehicle is initially started, when the vehicle is at a complete stop and
the steering is turned to its maximum left or right position, or during launch when the engine is cold.
CAUSE:
These conditions may be caused by: Loss of fuel pressure, throttle body injector (TBI) unit gasket protruding into the throttle bore (1991-1992 through
VIN NZ 151498) and/or engine calibration.
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Possible causes for the loss of the fuel pressure include the TBI fuel pressure regulator assembly valve not seating due to debris, or leaking fuel pump
check valve, fuel line or injector. This condition can cause the engine to stall immediately after start usually within 15 seconds.
