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1998 Mustang Convertible temp gauge maxing

  • Thread starter Thread starter Jstoyka1
  • Start date Start date Mar 20, 2019
  • Tags Tags
    1998 mustang radiator temp guage temp sensor.
J

Jstoyka1

New Member
Mar 20, 2019
3
0
1
Saint Clair Shores, Michigan
Mar 20, 2019
#1
  • Mar 20, 2019
  • #1
Owning and driving for a year and a half. No problemd. All guages normal. In garage for dec and January. Need to drive a few miles since the wife had other car. Within 2 miles temp gauge maxed out. No steam. Drove 1 mile to destination. On way home stopped at Valvoline for an oil change. Topped off radiator fluid. On the way home gauge maxed out again within 1 mile
Put in the garage and haven't driven since other than starting every few weeks. Radiator, a/c all new within last year
. looking for a possible solution before I take to my mechanic.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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polk county florida
Mar 20, 2019
#2
  • Mar 20, 2019
  • #2
Welcome to stangnet
V6 or 8
 
J

Jstoyka1

New Member
Mar 20, 2019
3
0
1
Saint Clair Shores, Michigan
Mar 20, 2019
#3
  • Mar 20, 2019
  • #3
General karthief said:
Welcome to stangnet
V6 or 8
Click to expand...
General karthief said:
Welcome to stangnet
V6 or 8
Click to expand...
V6
General karthief said:
Welcome to stangnet
V6 or 8
Click to expand...
V6
 
J

Jstoyka1

New Member
Mar 20, 2019
3
0
1
Saint Clair Shores, Michigan
Mar 20, 2019
#4
  • Mar 20, 2019
  • #4
V6
 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
Mar 21, 2019
#5
  • Mar 21, 2019
  • #5
Just wondering. Have you performed a visual inspection looking for rodent activity? Smell anything under the hood?

Note a bad idea to perform a visual inspection of the engine coolant temperature sensor (ECT) electrical connector. Look for bent/pushed/corroded pins.

Also note that the V6 is very bad about trapping air inside the cooling jacket. There is a specific procedure to bleed the air from the coolant. Would you do that or take it to a mechanic?

V6 coolant refilling procedure
https://www.allfordmustangs.com/for...stang-irregular-rpms-showing-hot.html#2604913
 
Last edited: Apr 23, 2019

kiddiccarus

The first widely accepted Tranny
20+ Year Stangneter
Dec 24, 2003
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30 Mins from a Ragged GT
Apr 20, 2019
#6
  • Apr 20, 2019
  • #6
B U R P the V6.... (94-95 at least)

in the center of the engine is a white ceramic looking ring that has a bolt on top. That is where it has to be burped at.

1. remove the bolt
2. fill the coolant until it comes out the hole
3. replace bolt

on these you can not just add coolant like other cars, you will have to do this procedure each time or that temp gauge will peg.


ALSO, if someone has installed a thermostat that will lock in open once the car overheats, you wont get it to heat up again until you pull the tstat and unlock it or replace it.
 

kiddiccarus

The first widely accepted Tranny
20+ Year Stangneter
Dec 24, 2003
1,789
1,051
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30 Mins from a Ragged GT
Apr 20, 2019
#7
  • Apr 20, 2019
  • #7
 
1

1990 5.0 LX

Member
Apr 11, 2019
37
19
18
Ben Lomond, CA
Apr 20, 2019
#8
  • Apr 20, 2019
  • #8
Is the car actually overheating? Might be that voltage is leaking to the gauge causing the needle to deflect upwards. Happens on my '90 when the headlights are on. Suggest you determine what the actual temperature of the radiator is.
 
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