EGT Gauge
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Tuned
Joined: Feb 2015
Posts: 258
Likes: 11
You need to find out where the probe is installed. If it is post turbo as you say the previous owner claimed it's nearly useless. It should be installed pre turbo on the exhuast manifold to be accurate of cylinder temps. Post turbo the gases have had time/room to expand and loose temp
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
That gauge does look like an early model. And I wonder about probe placement...It should give a cooler reading if the probe is in the downpipe instead of the manifold but to me it's still a base to start from and monitor. Comparing with the rest of us would be tougher because we monitor at a different location but he should still be able to tell if something is wrong if he knows his baseline and normal numbers. And temps of 1250 would not be good at that point.
Fleet Mechanic
Joined: Nov 2009
Posts: 1,381
Likes: 193
From: Cambs, England
Does the backlight come on with the ignition? If so then it may just be the wires for lighting & power for the sensor are swapped. As said the sensor should be in the exhaust manifold for accurate readings.
Laughing Gas
Joined: Mar 2004
Posts: 789
Likes: 16
From: West Coast/L.A. Area
You need to find out where the probe is installed. If it is post turbo as you say the previous owner claimed it's nearly useless. It should be installed pre turbo on the exhuast manifold to be accurate of cylinder temps. Post turbo the gases have had time/room to expand and loose temp
Lead Driver
Joined: Apr 2011
Posts: 8,259
Likes: 346
From: Northern California
you might want to check the sensor of your EGT gauge and make sure it is actually a thermocouple., Typically a K Type thermocouple will not function correctly if you were to change the resistance in the wiring by adding a switch like you are describing
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TheKirbyMan
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Aug 10, 2009 09:57 PM
