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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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Temperature gauge

  • Thread starter Thread starter gmartian
  • Start date Start date Jul 25, 2021
G

gmartian

New Member
Dec 7, 2020
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Seekonk
Jul 25, 2021
#1
  • Jul 25, 2021
  • #1
I have a 1986 GT and for some reason in roughly 5-7 minutes, it already reads hot. The infrared gun will read 185 the absolute highest and thats on the thermostat housing itself. Both hoses read 170ish. I have installed a new temp sensor, and now im trying to install an autometer gauge, but it reads 240 in accessory and 250 off cold start... lost on what to do here.

Heater core bypassed
SVE 3 row aluminum radiator
Water pump is only 6 months old
Smog pump removed
 

JD1964

there is enough sticking out to grab on to
15 Year Member
Jun 28, 2013
3,427
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Maryland
Jul 26, 2021
#2
  • Jul 26, 2021
  • #2
Are you able to check the voltage signal going to the gauge? I thought maybe if it's low, the condition would trick the gauge into thinking the engine is hotter than it really is.
 

2000xp8

SN Certified Technician
Aug 8, 2003
8,015
1,613
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NJ
Jul 26, 2021
#3
  • Jul 26, 2021
  • #3
I'm assuming you bought a electric autometer as opposed to a mechanical?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,164
17,860
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Massachusetts
Jul 26, 2021
#4
  • Jul 26, 2021
  • #4
Here’s the wiring diagram for 1986 only. Do you have any issues with the fuel and oil pressure guage?

 
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