Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine - Surge/Misfire/DTC Code 43/Oil In Distributor
1987 Pontiac Firebird V8-350 5.7LSECTION Engine - Surge/Misfire/DTC Code 43/Oil In Distributor
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Bulletin Number: 88-6-89
Reference Number: 936504
Publish Date: 2/89
Subject: ENGINE ROUGH, SURGE, MISFIRE, CODE 43 (DISTRIBUTOR SHAFT P/N)
Models
Affected: 1987 GRAND PRIX MODELS WITH LG4 ENGINES
1987 SAFARI WAGON WITH LG4 ENGINES AND
1987-1988 FIREBIRD MODELS WITH LG4, LB9 OR L98 ENGINES
This bulletin supersedes bulletin 87-6G-56 dated 8/87 which should be discarded. This bulletin is being revised to include symptoms of surge, misfire and/or code 43.
Some vehicles equipped with 5.0L and 5.7L engines built with distributor, P/N 1103698, may exhibit a rough running engine condition, surge, misfire and/or Code 43. This condition may be the result of oil ascending the distributor shaft and accumulating inside the distributor cap.
If oil is found inside of the distributor cap, wipe the distributor cap, module and distributor base clean with a soft cloth and replace the distributor mainshaft assembly with P/N 10467353 per service procedures in section 6D4 of the appropriate Service Manual.
Parts are currently available from GMSPO.
Use applicable labor time and operation number.
Bulletin Number: 88-6-89
Reference Number: 936504
Publish Date: 2/89
Subject: ENGINE ROUGH, SURGE, MISFIRE, CODE 43 (DISTRIBUTOR SHAFT P/N)
Models
Affected: 1987 GRAND PRIX MODELS WITH LG4 ENGINES
1987 SAFARI WAGON WITH LG4 ENGINES AND
1987-1988 FIREBIRD MODELS WITH LG4, LB9 OR L98 ENGINES
This bulletin supersedes bulletin 87-6G-56 dated 8/87 which should be discarded. This bulletin is being revised to include symptoms of surge, misfire and/or code 43.
Some vehicles equipped with 5.0L and 5.7L engines built with distributor, P/N 1103698, may exhibit a rough running engine condition, surge, misfire and/or Code 43. This condition may be the result of oil ascending the distributor shaft and accumulating inside the distributor cap.
If oil is found inside of the distributor cap, wipe the distributor cap, module and distributor base clean with a soft cloth and replace the distributor mainshaft assembly with P/N 10467353 per service procedures in section 6D4 of the appropriate Service Manual.
Parts are currently available from GMSPO.
Use applicable labor time and operation number.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.