Catalyst Converter overheating light

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
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hoover240sx
Posts: 1
Joined: Sun Aug 09, 2015 10:32 pm
Car: 1990 silvia s13 240sx

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So i have a 1990 s13 from Canada. Anyways I drive up and down the highway to go to school and what not everyday, it is my daily. I have a SR20DET swap and there is no cat. converter on my exhaust system. But lately if i run it anywhere above 3500 RPMs the light comes on saying its overheating?? Is this just an O2 sensor i need to rewire or is my exhaust getting to hot or what could cause that light to come on? Any ideas?

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PapaSmurf2k3
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Posts: 18997
Joined: Thu Nov 21, 2002 3:20 pm
Car: 2017 Corvette, 2018 Focus ST, 1993 240sx truck KA Turbo.
Location: Merrimack, NH

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Is it the temperature light? Because that usually means coolant.
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asoomal
Posts: 2374
Joined: Tue Feb 26, 2008 4:45 pm
Car: 2001 Subaru Impreza L 5MT (Daily)
1992 Nissan 240SX SE 5MT w/HICAS (Being restored)
Location: Canada

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JDM cluster?
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