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Engine My engine dies after running 10 to 15 minutes under high heat.

  • Thread starter Thread starter Wylieone
  • Start date Start date Jun 21, 2026
W

Wylieone

New Member
Jun 21, 2026
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1
FL
Jun 21, 2026
#1
  • Jun 21, 2026
  • #1
I have a 1990 GT hatchback. It doesn’t run more than 10 to 15 minutes before it shuts off. I live in South Florida. I have changed multiple parts, including new fuel pump new fuel pump relays new distributor relocated to TFI to the passenger side fender well, I have a new distributor. I have all new wires and plugs. I have a new coil. My TPS and idle are set correctly. I have a new alternator new mass airflow sensor, new fuel sensor relay, refurbished EEC, new EEC relay. It continues to die. I am out of options if anybody knows why this is happening or how to correct it please let me know.
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,965
4,076
183
Claremore, OK
Jun 21, 2026
#2
  • Jun 21, 2026
  • #2
Assuming you have pulled codes?
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,956
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polk county florida
Jun 21, 2026
#3
  • Jun 21, 2026
  • #3
Besides checking codes, you need to monitor the fuel pressure while the engine is running and see if there are any pressure changes when the engine gets hot and dies.
At least that's where I'd start.
 
W

Wylieone

New Member
Jun 21, 2026
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0
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FL
Jun 21, 2026
#4
  • Jun 21, 2026
  • #4
General karthief said:
Besides checking codes, you need to monitor the fuel pressure while the engine is running and see if there are any pressure changes when the engine gets hot and dies.
At least that's where I'd start.
Click to expand...
No codes are coming up. I have consistent fuel pressure at 35. The car just stalls out with no drop off in fuel pressure. I have also tested the spark at the coil and at the distributor. Its bizarre why this is happening.
 

gkomo

now i can hopefully expect to receive the shaft
Aug 2, 2024
2,206
1,440
133
San Diego, CA
Jun 21, 2026
#5
  • Jun 21, 2026
  • #5
By no codes do you mean you get nothing? Or code 11…10…. KOEO then code 11 again in KOER?
 
W

Wylieone

New Member
Jun 21, 2026
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1
FL
Jun 21, 2026
#6
  • Jun 21, 2026
  • #6
Yes thats correct
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,965
4,076
183
Claremore, OK
Jun 21, 2026
#7
  • Jun 21, 2026
  • #7
Which one is correct? 11,10, 11 or nothing?
 
Reactions: dan50 and Mcmahst

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,265
17,952
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Massachusetts
Jun 22, 2026
#8
  • Jun 22, 2026
  • #8
SO when it does. Does it restart easily? Does it not restart until cooled down?
 
Reactions: DadLife0724
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