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Mercury
Marquis
Engine
Symptoms
Misfire
Misfire after replacing plenum gasket
WESTRUCK
MEMBER
1992 MERCURY MARQUIS
4.6L
V8
2WD
AUTOMATIC
160 MILES
Changed intake plenum gasket engine began to misfire after start up.
Friday, September 27th, 2019 AT 8:00 PM
1 Reply
JACOBANDNICKOLAS
MECHANIC
109,645 POSTS
Welcome to 2CarPros.
Check to see if there are any vacuum leaks. Chances are something came disconnected or broken. Here is a link that will explain how to check:
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
If nothing is found, retrieve diagnostic trouble codes. On this vehicle, all you need is a test light. Follow the directions in this link.
https://www.2carpros.com/articles/ford-lincoln-mercury-obd1-1995-and-earlier-diagnostic-trouble-code-definition-and-retrieval
Let me know what you find.
Joe
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Friday, September 27th, 2019 AT 8:43 PM
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