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LT7A · 01-07-2022, 02:58 AM

I will follow along with interest. My truck is a 93, but basically the same engine. I just replaced the t stat since the temperature gauge was never moving above about 105° and so I figured that t stat was stuck open. I was only using it for short trips. But I just took it on the long road trip and the temperature still didn't rise and I could see that the t stat was closed when cold and open when warm by popping the radiator cap. So I'm assuming that the temperature sensor is the culprit. I hope I don't have any other problems hiding behind it like your situation. There's only the single coolant temperature sensor that is both for the computer and the gauge correct, front of the intake manifold next to the water neck?

01-07-2022, 02:58 AM	#2
LT7A Registered User Join Date: Oct 2015 Location: PNW Posts: 3,511	Re: TBI 5.7 dreaded code 42 saga I will follow along with interest. My truck is a 93, but basically the same engine. I just replaced the t stat since the temperature gauge was never moving above about 105° and so I figured that t stat was stuck open. I was only using it for short trips. But I just took it on the long road trip and the temperature still didn't rise and I could see that the t stat was closed when cold and open when warm by popping the radiator cap. So I'm assuming that the temperature sensor is the culprit. I hope I don't have any other problems hiding behind it like your situation. There's only the single coolant temperature sensor that is both for the computer and the gauge correct, front of the intake manifold next to the water neck?