Misfire after replacing plenum gasket

Tiny
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

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 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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