5.4 Temp gauge issue?
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Joined: Jul 2009
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From: Rocky Mtns. of Colorado
5.4 Temp gauge issue?
1997 E-350 5.4L. Starts and run okay. Not boiling over or leaking.Temp gauge needle is up in the red zone once up to temp. Scan gauge indicates ECT 220 - 225. No CEL or codes present. I am trying to figure out if I have an overheating issue or a gauge/sensor issue. I'm assuming that the scan gauge reads the ECT from the same sending unit that the dash gauge uses, so if the sending unit were bad, I wouldn't get a temp reading on the scan gauge, no? 220 seems to be on the high side of normal, but I wouldn't think that would peg the gauge. I'm wondering what temps correlate to the dash gauge. Thoughts?
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Joined: Dec 2009
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I have a similar problem. My temp will spike to the max and the "check gauges" message will appear. If I pull over - shut down - restart immediately - the gauge goes back to normal. Motor does not appear to be hot. Seems like a bad coolant temp sensor to me. Garage said it would be almost $200 to fix it. Anyone out there know what it takes to replace the sensor? Where is it located? Under the intake manifold?
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