Radiator Sensor Problem! Help!
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Senior Member
Joined: Aug 2001
Posts: 627
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From: Stafford CT
Car: 1988 Camaro SC
Engine: LT1 SBC
Transmission: LT1 T56
Axle/Gears: 3.73 Moser 12 Bolt
Radiator Sensor Problem! Help!
Hey everyone - my SC has a little problem, when the temp guage hits 220' it doesn't kick the electric fan on. I replaced the sensor in the passenger side head but I basically have no idea which sensor controls the fan - any ideas? The car WAS a 305 TBI Sport Coupe, now it has a 355 in it.
TP
TP
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Joined: Sep 2000
Posts: 6,775
Likes: 27
From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
The impression I get is the same sensor was used in the pass side head for all years of 3rdgens... according to diagrams.. the head fan switch doesn't ground until 238°. From what I can tell too, the TBI ECM has no control to the fan.
Your best bet would be to replace the 'sensor' in the pass side head with a JET 200° (off at 185º) fan switch or just wire up a manual switch. GM intentionally made these cars run hotter than.. well.. you know
Even the TPI ECM controlled fans didn't kick on until around 220-225º or so. Makes a little sense tho when the OEM thermo is rated for 195° (opening closer to 200°)
Your best bet would be to replace the 'sensor' in the pass side head with a JET 200° (off at 185º) fan switch or just wire up a manual switch. GM intentionally made these cars run hotter than.. well.. you know
Even the TPI ECM controlled fans didn't kick on until around 220-225º or so. Makes a little sense tho when the OEM thermo is rated for 195° (opening closer to 200°)
Last edited by deadbird; Feb 6, 2002 at 11:04 AM.
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