temp gauge fluctuates
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temp gauge fluctuates
92 f150 302 5 spd 155,000mi
have owned the truck since 40,000mi. the temp gauge has always run steady in one place somewhere between the cold line to the n on normal. all of a sudden its takes spells and moves rapidly between the cold line and n. you can visually watch it move over 1/8in up and down in just a few seconds. i guess the only good thing is it dosent seem to be overheating. speed and rpm dont seem to make a difference. im wondering about the temp sending unit. just dosent seem like a cooling problem. what do yall think?
within the last year i have replaced:
195 thermostat
engine coolant temp sensor
radiator flushed
have owned the truck since 40,000mi. the temp gauge has always run steady in one place somewhere between the cold line to the n on normal. all of a sudden its takes spells and moves rapidly between the cold line and n. you can visually watch it move over 1/8in up and down in just a few seconds. i guess the only good thing is it dosent seem to be overheating. speed and rpm dont seem to make a difference. im wondering about the temp sending unit. just dosent seem like a cooling problem. what do yall think?
within the last year i have replaced:
195 thermostat
engine coolant temp sensor
radiator flushed
Junior User
Joined: Jul 2004
Posts: 63
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From: Northwest Germany
Hi grousehunter,
I had the same problem on my '94 F-150, 302. Here is some info:
1. on EEC engines there are 2 independent water temp sensors installed.
2. the one feeding the EEC is found above the thermostat housing (horizontal) and has 2 pins.
3. the one feeding the gauge (standing vertical with only 1 threaded pin) is hard to find between the intake manifold and the driver side valve cover.
4. to check the gauge, connect the gauge lead (has only 1 pin) over 10 ohms to ground. The gauge pointer should move to Max (H).
I followed this procedure and found my temp gauge okay, so I replaced the sensor. Now the pointer stays normally on the "o" of "Normal".
LoL Dieter
I had the same problem on my '94 F-150, 302. Here is some info:
1. on EEC engines there are 2 independent water temp sensors installed.
2. the one feeding the EEC is found above the thermostat housing (horizontal) and has 2 pins.
3. the one feeding the gauge (standing vertical with only 1 threaded pin) is hard to find between the intake manifold and the driver side valve cover.
4. to check the gauge, connect the gauge lead (has only 1 pin) over 10 ohms to ground. The gauge pointer should move to Max (H).
I followed this procedure and found my temp gauge okay, so I replaced the sensor. Now the pointer stays normally on the "o" of "Normal".
LoL Dieter
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thanks german guy.
i changed the temp sensor this evening and the jumping up and down stopped. but now it runs in between r and m on "normal". go figure have personally driven the truck from 40,000mi to now and have never had it run this high before. i am going to change the thermostat tomorrow even though its less than a year old just to be sure.
thanks
grousehunter
i changed the temp sensor this evening and the jumping up and down stopped. but now it runs in between r and m on "normal". go figure have personally driven the truck from 40,000mi to now and have never had it run this high before. i am going to change the thermostat tomorrow even though its less than a year old just to be sure.
thanks
grousehunter
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learmoia
Explorer, Sport Trac, Mountaineer & Aviator
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Dec 29, 2006 10:16 PM
2004, explorer, f150, f350, fluctuates, flucuates, ford, gas, gauge, moves, rapidly, temp, temperature, thermostat, truck
