S10/T10 P/U 2WD L4-2.2L VIN 4 (1995)
EGR Valve: Testing and Inspection
RESULTS OF INCORRECT OPERATION
With too much Exhaust Gas Recirculation (EGR) flow at idle, cruise, or cold operation, any of the following conditions may occur:
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Engine stops after cold start.
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Engine stops at idle after deceleration.
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Vehicle surges during cruise.
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Rough idle.
If the EGR valve should stay open all of the time, the engine may not idle.
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Diagnostic Trouble Code (DTC) 32 may set. Refer to Diagnostic Trouble Codes. See: Computers and Control Systems/Testing and
Inspection
Too little or no EGR flow allows combustion temperatures to get too high during acceleration and load conditions. This could cause:
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Spark knock (detonation).
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Engine overheating.
SYSTEM CHECK
Diagnosis of the EGR system is covered in C Charts. See: Computers and Control Systems/Testing and Inspection
