Question about 1995 Chevrolet Caprice Classic

1 Answer

Just installed new water pump for my 95 Chevy caprice classic, tested it and notice my fan is not coming on in the mean time still pouring about 2 1/2 50/50 antifreeze coolants. After about 10 or 15 minutes I saw antifreeze coming from the thermostats. Need to know whats going on please help!!!

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  • leonelion77
    leonelion77 Jan 01, 2013

    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.

  • teds repairs
    teds repairs Jan 01, 2013

    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

  • leonelion77
    leonelion77 Jan 01, 2013

    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.

  • teds repairs
    teds repairs Jan 01, 2013

    put the heat on high and let it run, if that does not work try replacing the cookant temp sensor

  • leonelion77
    leonelion77 Jan 02, 2013

    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.

  • teds repairs
    teds repairs Jan 02, 2013

    t is all good. anytime the radiator is drained always run the heat on high it open things faster

  • leonelion77
    leonelion77 Jan 02, 2013

    Thank u Sir...for all the help I appreciate the information!

  • teds repairs
    teds repairs Jan 02, 2013

    I am here to help

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  • Chevrolet Master
  • 2,101 Answers

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

Posted on Jan 01, 2013

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 1995 chevy caprice classic

Try replacing your fuel pump relay, Its common on chevys.Those fuel pumps are too expensive to keep replacing

Posted on Nov 18, 2008

c_dyer01905
  • 24 Answers

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.

Posted on Nov 15, 2010

dttech
  • 4803 Answers

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.

Posted on Feb 26, 2011

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