FALSE SETTING-TROUBLE CODE 31 WIDE OPEN THROTTLE DOWNSHIFT. Pontiac Sunbird 1984

For 1990-2009 cars

# FALSE SETTING-TROUBLE CODE 31 WIDE OPEN THROTTLE DOWNSHIFT

THE 1.8L TURBO (LA5) ENGINE IN THE "J" SERIES MAY ENCOUNTER A MOMENTARY FUEL SHUT-OFF (SAG) CONDITION. IF THE CAR IS DRIVEN AT A STEADY LIGHT BOOST CONDITION (APPROXIMATELY 2-3 PSI BOOST) AND THE DRIVER GOES TO WIDE OPEN THROTTLE WITH A DOWNSHIFT FOR MORE THAN TWO SECONDS. THE ENGINE WILL SHUT-OFF THE FUEL FOR A SHORT PERIOD OF TIME (APPROXIMATELY ONE SECOND), BECAUSE OF AN OVERBOOST CONDITION, THEN COME ON AGAIN, AND EVERYTHING WILL RETURN TO NORMAL. DURING THIS TIME, THE "CHECK ENGINE" LIGHT WILL COME ON, AND CODE 31 WILL BE STORED. DIAGNOSIS FOR CODE 31 WILL FIND NO PROBLEMS. IT SHOULD BE EMPHASIZED THAT THIS CONDITION IS VERY UNLIKELY TO OCCUR IN NORMAL DRIVING. TO REPAIR THIS FALSE CODE CONDITION, REPLACE THE PROM WITH THESE PART NUMBERS: PART NUMBER 1226928 - CALIFORNIA PART NUMBER 1226929 - FEDERAL

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