LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

fans wont come on

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Old Apr 29, 2007 | 01:30 PM
  #1  
95m6z28's Avatar
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fans wont come on

ok so i changed my opti and water pump with accel unit the car runs great but fans wont work unless i disconnect my maf sensor ive replacet the rad fan sensor and the coolant temp sensor what could cause this?
Old Apr 29, 2007 | 01:34 PM
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What temp is it getting to and do they come on when you turn on the a/c?
Old Apr 29, 2007 | 01:42 PM
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it gets to about 240ish and no it dosnt turn on with the ac

Last edited by 95m6z28; Apr 29, 2007 at 01:58 PM.
Old Apr 29, 2007 | 09:10 PM
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I would verify the temp reading the PCM sees with a scanner and also see if the PCM is commanding the fans on with the a/c.
Old Apr 30, 2007 | 06:08 AM
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Disconnecting the temp sensor at the water pump should cause the fans to run if fuses and relays are good. Jumpering the 4 and 5 terminals at the DLC connector should do the same.
I've seen this happening several times when coolant is drained and the sensor goes dry that it needs some time before going back to normal.
Old May 4, 2007 | 03:11 AM
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yall rock thanks for the advice
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