94lt1 no heat, no fans, over heating= im lost

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Old Dec 7, 2013 | 05:34 AM
  #1  
devils94's Avatar
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Default 94lt1 no heat, no fans, over heating= im lost

So here's the problem. No heat, fans, and over heating.
Here's what I've replaced
Water pump
Thermostat
Hoses
Radiator
Sensor in pump
Sensor in head
Sensor on radiator
Now here's what it's doing..... Fans only kick on wheniI have my test light hooked up and was checking for power to relays... Those are also good... Plus the gauge inside will peg out but the car isn't puking or bubbling I've bleed it every which way from Sunday still nothing... Anyone else had this problem cause aside from taking to a shop and paying out the *** I'm lost HELP
 
Old Dec 7, 2013 | 06:22 AM
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go here and have a look at 12 and 20 4th Gen LT1 F-Body Tech Aids
it sounds like you have a short somewhere and maybe something else goin on. have you done a coolant system pressure test?
 
Old Dec 7, 2013 | 08:24 AM
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Originally Posted by devils94
Now here's what it's doing..... Fans only kick on wheniI have my test light hooked up and was checking for power to relays...
Interesting symptom - means the test light is completing the circuit for the fan relay coil, relay energizes and fans come on, as they should when you select MAX A/C.

I would look for a bad coil ground and read how to purge the cooling system.
 
Old Dec 8, 2013 | 09:15 AM
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What is your reason for thinking the engine is overheating? Just the gauge?
 
Old Dec 9, 2013 | 04:41 AM
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Originally Posted by GaryDoug
What is your reason for thinking the engine is overheating? Just the gauge?
yes plus the fact that only after the car is shut off and turned back on does it start to bubble and puke fluid and either the gauge is reading wrong or is messed up on the insterment panel or somewhere cauuse the sensor isn't even a week old
 
Old Dec 9, 2013 | 04:43 AM
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Originally Posted by craby
go here and have a look at 12 and 20 4th Gen LT1 F-Body Tech Aids
it sounds like you have a short somewhere and maybe something else goin on. have you done a coolant system pressure test?
Yes if pressure checked the system and replaced anything and everything that reads, holds, or lets it flow.. the only thing I have not replaced is the radiator itself I've had it cleaned and flow tested
 
Old Dec 9, 2013 | 08:46 AM
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hate to say it but check the steam tube to see if its plugged. its at the back of the engine, runs from one head to the other. http://shbox.com/1/egr1.jpg
 
Old Dec 9, 2013 | 03:25 PM
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Originally Posted by devils94
yes plus the fact that only after the car is shut off and turned back on does it start to bubble and puke fluid and either the gauge is reading wrong or is messed up on the insterment panel or somewhere cauuse the sensor isn't even a week old

How do you see it "bubble and puke fluid"? Did you take off the radiator cap or did it overflow with the cap installed? How long did the car sit before starting it again? It is normal for the coolant temperature to rise for a while after shutting off the engine due to the lack of circulation and cooling.
 
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