What motor do you have? is it the 4.3 or the ltz motor. did you install a new thermostat and gasket. you should have 2 fans on it. 1 is a manual fan and the other is electric
SOURCE: 1995 chevy caprice classic
Try replacing your fuel pump relay, Its common on chevys.Those fuel pumps are too expensive to keep replacing
SOURCE: I have a 96 chevy
Bad water pump. The seals are more than likely shot. Usually at higher rpm the temp goes down and at idle it would overheat. Had a friend with the same problem.
I’m happy to assist further over the phone at https://www.6ya.com/expert/cameron_6665f74c5d46fc23
SOURCE: I have a 1995 chevy caprice classic and it keeps
Your cooling fan relays are controlled by the Engine Control Module (ECM). What you are unplugging is probably the Engine Coolant Temperature Sensor (ECT). The ECM will default to "fans on" if it loses the circuit to the ECT. (It loses it when you unplug it) This is why the fans come on when you unplug the connector. The engine might be overheating because the ECT may be malfunctioning and "lying" to the computer about what the actual engine temperature is. If this is the case, the ECM is not turning the fans on because it doesn't "think" it is hot enough to need them. Then again, you could have a faulty temperature gauge that is making you think the engine is overheating when it is not. (If it is boiling over, then it is OBVIOUSLY overheating and you can just disregard that last statement.)
Anyway, the only way to properly diagnose the cooling system on your vehicle is to access the live engine data and look to see what temperature the ECM is seing while you take an actual reading with an infrared thermometer or a pyrometer and compare the two. Yhe thermometer or prometer reading should be within about 5 degrees of what the ECM "thinks" the temperature is. If there is a larger error than this then the coolant temp sensor should be replaced. If the reading is within this range and the temperatur gauge reads hot when it is not, then the gauge should be replaced.
Since the fans come on when you unplug the sensor, you know that all the fan circuits are working and the ECM is capable of controlling them, so it almost has to be a computer INPUT problem, not an OUTPUT problem.
379 views
Usually answered in minutes!
Hey Teds, Happy New Year first of all and appreciate your quick response. I have the 4.3L and just finished installed new thermostats add more antifreeze run the engine for about ten minutes, took it for test drive it seems running fine, but still the fan didn't kick in at all while I was test driving it.
happy new year. is there 2 fans. I just had a buick road master in my shop with the ltz motor and I did the water pump. it had 2 fans . do you have 2 fans .the coolant temp sensor runs the electric fan
Yes sir, its has two fans, as I mention no leaks that I see accept the fan won't kick in, it usually the left side fan that always kick in.
put the heat on high and let it run, if that does not work try replacing the cookant temp sensor
Yes, it did work putting the heat on high and not letting the air blow, both fans came on. Does this mean I'm good to go nothing to worry about it anymore.
t is all good. anytime the radiator is drained always run the heat on high it open things faster
Thank u Sir...for all the help I appreciate the information!
I am here to help
×