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Engine coolant sensor location please?

Tiny
RODY903
  • MEMBER
  • 1997 MERCURY MARQUIS
  • 5.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 137,000 MILES
My car decides to overheat when I am on the pedal, as soon as I let go of the gas it lowers back down to normal. I have changed the radiator, the water pump, and thermostat, and bled the coolant system. Do you thing a bad engine coolant temperature sensor would make this problem happen?
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Wednesday, June 19th, 2019 AT 4:32 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,878 POSTS
Hello,

I have seen a bad connection at the engine coolant sensor cause this problem. Here is the location so you can check it out. If the connection is good replace the sensor. Check out the diagrams (below). Please let us know what happens.
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Friday, June 21st, 2019 AT 2:08 PM
Tiny
RODY903
  • MEMBER
  • 2 POSTS
The sensor was bad. But once I drove it, it drove fine but after a while it started overheating again.
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Sunday, June 30th, 2019 AT 3:13 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,878 POSTS
I bad fan clutch can cause this as well. here is a guide that will walk you through the replacement:

https://www.2carpros.com/articles/fan-clutch-removal

Please run down this guide and report back.

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Monday, July 1st, 2019 AT 11:06 AM

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