I replaced the sensors in each head, I am not sure if I got the right one for the passenger side. (Anybody know the PN#?) While doing a tune up my car steadily rose to just under 240*, I killed the engine then. I know the drivers side fan works because it kicks on when I jump the ADAL. Is the connecter for the passeger side sesor supposed to be just a wire, no weather pack conecter. When are the fans supposed to kick on anyway?

-'89 Camaro TPI 350

 

I think thay come on close to 200 like 185 or higher I cant remember the exact. Have you Changed the fan relay it is on the passanger side up buy the battary or air filtter wich ever you have on that side.

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87gta 355 fastburn heads,slp headers,flowmaster exhaust, LT4 hot cam and a lot more

 

Well...

Primary fan comes on around 235*F, controlled by the ECM. ECM gets it's input from the CTS located at the front of the intake. Set point on/off is in the EPROM. Stock is like on-235/off-220. ECM grounds the primary fan relay which then turns on the primary fan.

Secondary fan is controlled through a relay as well (2ndry fan relay). This relay is controlled wia the fanswitch in the passenger side head. Factory setpoint is in the area of 242*F. When this FS is met, BOTH fans on your '89 should come one. This is also the FS that is changed to a lower setpoint switch, along with a lower setting Tstat, to keep the engine running cooler in idling/stop and go driving. The 2ndry fan is also controlled vis the high pressure switch in the A/C system...turn your A/c on for a few minutes and the fans should also come on.

 

Oh, the sending unit in the driverside head is only for the temp gauge, has no effect on anything else.

 

same problem with mine.. replaced the fuse wire... (after back tracking everything and replacing relays)

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87 formula
LB9, Automatic
K&N
3" mandrel bent exhaust,
v-force muffler
Hypertech preformance