Temp Guage Fluctuating
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Joined: Sep 2001
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Temp Guage Fluctuating
Cant figure this deal.Normally on my '92 F-150 w/302 auto..when engine gets up to normal temp,needle will stay around the N-O letters(cold side) of the NORMAL script on the temp guage.Now it has taken to fluctuating during driving,and it moves off the N-O toward the COLD side of the guage ...then back to N-O.What gives here?Thermostat maybe?Thanks for any ideas.
Senior User
Joined: Jun 2003
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Check the wiring, but it sounds like a thermostat that's stuck open.
A quick test is start the engine cold and hold your hand on the top rad hose it should stay the same tempature (cool to the touch) for the first 8 min at least if it starts to warm up before that, it's probably stuck open.
On the other hand if you have not changed it in the last 2-3 years just do it. (cheap insurance) P.S. let me know if you need more help.
Regards, Domenico...
A quick test is start the engine cold and hold your hand on the top rad hose it should stay the same tempature (cool to the touch) for the first 8 min at least if it starts to warm up before that, it's probably stuck open.
On the other hand if you have not changed it in the last 2-3 years just do it. (cheap insurance) P.S. let me know if you need more help.
Regards, Domenico...
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nnero
1987 - 1996 F150 & Larger F-Series Trucks
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Oct 27, 2009 08:04 PM
