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1992 Pontiac Firebird engine wont run at operating temp

Tiny
DONNYSTYLE
  • MEMBER
  • 1992 PONTIAC FIREBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
I have a 1992 pontiac firebird that has a new motor with 10 thousand miles on it, My question is the engine sputters out and stalls when it gets to about 210 - 215 degrees. I have changed the fuel pump, fuel filter, blew out the fuel lines, changed the dist. Ca, ign. Rotor, wires, and plugs. When I first start it, it runs mint but as soon as it warms up it stalls under load, it idels fine. Any help would so helpful,

thank you
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Tuesday, September 22nd, 2009 AT 9:19 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Has the check engine light come on? Have you checked to make sure the EGR is functioning correctly?

Let me know.
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Thursday, September 24th, 2009 AT 10:46 AM
Tiny
DONNYSTYLE
  • MEMBER
  • 3 POSTS
Thank you for your quick response. I haven't checked the e.G.R. Yet, the check engine light has not come on yet. This car has got me totally stumped.

Thank you very much again for any suggestions
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Thursday, September 24th, 2009 AT 11:16 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Let me know what you find. Also, the temp is getting higher than I like. You may want to replace the t-stat.
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Thursday, September 24th, 2009 AT 1:51 PM
Tiny
DONNYSTYLE
  • MEMBER
  • 3 POSTS
Thanks again for your help with my 92 pontiac firebird, it ended up being the foolish e.G.R. Valve I removed the hose plugged the hole and now it runs great. I guess the valve was sticking open.
Thank you again,
D.J.
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Monday, September 28th, 2009 AT 11:37 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
I'm glad you found the problem. Let us know if you have questions in the future.
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Monday, September 28th, 2009 AT 12:11 PM
Tiny
CONSTRUCT
  • MEMBER
  • 1 POST
While I'm no "pro" car mechanic I also own a 92 v8 pontiac firebird original engine (few parts replaced) and after a full tuneup timed and completely maintenanced I get a operating temp of about 120 average in the hot sun of florida. Again I'm no pro mechanic but shouldn't a v6 version of the 92 run operating temp of about the same? Before the tuneup and maintenance mine also ran above temp at around 240-260.
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Thursday, October 15th, 2009 AT 6:54 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Actually the factory thermostat is set to open fully at 195 degrees. If you are running at 120, it isn't running warm enough which will eventually cause other problems.
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Thursday, October 15th, 2009 AT 1:41 PM

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