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Cylinder head temp sensor headache


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Befor I spend 60 bucks on a new sensor can anyone tell me what it should read. With the engine cold it reads like 2k ohms with it warm it is 500 ohms and lower. When I hook it up I get ohms in the meg so I switched to volts and read around 1-2v. My car is running like the ecu is in a closed loop and I think my timing is not retarding at high revs. The symptoms are a flat spot at 3500-4000 and up. I have read posts that it could be the plugs at the ecu, I ve cleaned them and every other plug. Im running the JWT sport 400hp with all new components except the CHTS. When I played with the sensor and tried to get some readings on it the car started to run better but than went back to its old ways. How do I test the CHTS? Any other suggestions would be appricated. P.s fuel press is 1 to 1 with psi boost A/F ratio is good thats why I think its closed loop timing issue. Thanks Paul

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  • 2 weeks later...

Yes I went ahead and changed it since everything else on the car is new. My problem has gone for now so I guess I'll keep my fingers cross. ANyone checking this post for answers to my question? This will give you a baseline. At 68f =2.3-2.7k ohms

122f=.77-.87ohms

176f=.30-.33ohms

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