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My car is a 1995 3100.
I replaced the serpentine belt and water pump. I'm running about 30% coolant which is fine. Hooked it up to the scanner and the coolant temp sensor seems to be working. It got up to 208 degrees and stayed there. The manaul said the thermostat opens completely at 208 so that means it working within perameters. The car goes in and out of closed loop even though the temperature is where it needs to be. The EGO sensor has never been replaced after 110,000 miles. It also seems to be sluggish at times. I'm thinking this may cause the car to switch from closed to open loop. The fan relay also seems to be out since I put voltage to the fan and it came on. And the coolant sensor measured within variying ohms when in while the car cooled off and worked when I had it hooked up to the diagnostic. Any help would be appreciated. It runs rich also. A stuck injector?
I replaced the serpentine belt and water pump. I'm running about 30% coolant which is fine. Hooked it up to the scanner and the coolant temp sensor seems to be working. It got up to 208 degrees and stayed there. The manaul said the thermostat opens completely at 208 so that means it working within perameters. The car goes in and out of closed loop even though the temperature is where it needs to be. The EGO sensor has never been replaced after 110,000 miles. It also seems to be sluggish at times. I'm thinking this may cause the car to switch from closed to open loop. The fan relay also seems to be out since I put voltage to the fan and it came on. And the coolant sensor measured within variying ohms when in while the car cooled off and worked when I had it hooked up to the diagnostic. Any help would be appreciated. It runs rich also. A stuck injector?
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