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2000 Mercury Marquis runs rugh untill it warms up

Tiny
WEEBLES63
  • MEMBER
  • 2000 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Recantly tuned it up with plugs and boots replaced with motorcraft plugs. I also changed antifreeze and thermostat. Runs rough untill it warms up also the temp gauge stoped working. Any info would be greatly apreciated thanks jeff
Monday, February 8th, 2010 AT 5:59 PM

3 Replies

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
OK I would unplug the temp sensor and ohm it when it is cold and get back to me with the ohms and the air temp at the time you check it. Now on the guage unplug the single wire to the temp sending unit for the guage and with key on engine off gound it out does the temp guage peg? If so replace the sending unit. Let me know what you find.
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Monday, February 8th, 2010 AT 7:33 PM
Tiny
WEEBLES63
  • MEMBER
  • 2 POSTS
I discovered the intake is cracked where the heater hose goes into the intake atthe spout that may be the root of all the evil thanks jeff
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Sunday, February 14th, 2010 AT 2:05 PM
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Yes it can be and this is available at most parts stores if you want to do this yourself. Let me know how it goes.
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Monday, February 15th, 2010 AT 10:35 AM

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