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1995 Pontiac Sunfire Engine tempurature problems

Tiny
BOSTITCH
  • MEMBER
  • 1995 PONTIAC SUNFIRE
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 189,000 MILES
I live in BC, canada and just had an aircare test done to my care which is a 1995 pontiac sunfire. The results came back that I have high hydrocarbon and carbon monoxide outputs. I have also noticed recently that my engine tempurature will remain constant in the middle of the thermostat while driving but if I am stopped for a period of time the temp gauge will rapidly increase to just under the yellow point then decrease and repeat. Is there any solutions you can think of and is it possible to give an estimate on how much you think it will cost to fix.
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Thursday, June 5th, 2008 AT 8:26 PM

4 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
High HC reading possible cause a tune up
check ignition system
check fuel pressure regulator
check o2 sensors
as for the overheating I would check the coolant level
check coolant fan operation
check and or replace the thermostat
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Thursday, June 5th, 2008 AT 8:59 PM
Tiny
BOSTITCH
  • MEMBER
  • 3 POSTS
The coolant is completely full, and the thermostat was replaced recently
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Thursday, June 5th, 2008 AT 9:41 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check coolant fan operation (relays, fuses, fan motor, sensor.)
check radiator
flush coolant system
belts
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Thursday, June 5th, 2008 AT 10:00 PM
Tiny
BOSTITCH
  • MEMBER
  • 3 POSTS
Thanks for your help
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Thursday, June 5th, 2008 AT 11:39 PM

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