302 overheating (indicated anyway)
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Senior User
Joined: Feb 2002
Posts: 133
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302 overheating (indicated anyway)
I have an EFI 302 in a 85 F-150 that shows a fluctuating temperature gague. I have changed the thermostat and the sending unit for the gague but still have the problem. I noticed when i changed the sending unit that the wire going to it was frayed and bare , so i wrapped it with electrical tape and replaced. Still had the problem. Then i removed the lead to the sending unit and still have a gague that bounces around.
Question is: Is this caused by the bare wire or is there another sensor somewhere that i don't know about?
BTW, the engine seems to be running at a normal temperature, i can touch the valve covers and the EFI when the gague reads hot with a bare hand.
Question is: Is this caused by the bare wire or is there another sensor somewhere that i don't know about?
BTW, the engine seems to be running at a normal temperature, i can touch the valve covers and the EFI when the gague reads hot with a bare hand.
Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
Before you spend any money, have the actual temp of the engine by carefully checking the coolant's temp. If you don't have a good thermometer, or if you are not sure about messing with a hot radiator, then your local mechanic will do it for a charge. It sounds like a bad wire, but the only way to know for sure is the thermometer. Good luck, John
