Engine runs rough after about ten minutes

1990 NISSAN MAXIMA
100,000 MILES • 3.0L • 6 CYL • 2WD • AUTOMATIC
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LORI SHOFFEITT
  • MEMBER
  • 1 POST
Runs for 10 minutes then starts running rough and the 2 fans won’t kick on. Also, the temperature gauge on the dash doesn’t show it’s hot.
May 7, 2022 at 6:12 AM
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SQM
  • Experienced Mechanic
  • 6,383 POSTS
Hello,

The first item you need to check is the coolant temperature sensor.
The sensor provides a signal for the gauge and the cooling fan to come on.

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

The coolant temperature sensor is located on the water inlet housing.

I have attached diagrams below for your reference.

Let me know of any questions.
Thank you.
May 7, 2022 at 9:22 AM
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