Question about 2004 Pontiac Grand Prix

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2007 grand prix losing coolant, no leaks any where. Code says misfire on cyl 6. Its not running hot. A gurgling sound in the dash is present, and 1 month age the heater and air stop working but then came back on 1 day later.

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Might be cylinder head gasket leaking to combustion chamber,small leak that it can sip into combustion chamber and burn but the coolant will not burn completely so will stick to spark plug and cause miss fire.

Posted on Oct 18, 2013

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Posted on Jan 02, 2017

emissionwiz
  • 75822 Answers

SOURCE: 2000 Grand Prix losing coolant

This all sounds like a leaking head gasket, the fast guage swing is caused by air pockets around the temp sensor.

Posted on Nov 06, 2008

  • 137 Answers

SOURCE: the blower fan speed control stopped working

usually a bad blower resistor is at fault...

Posted on Feb 05, 2009

demonram440
  • 42 Answers

SOURCE: '97 Grand Prix 3.1L...Head Gasket? Manifold? Control Module?

Hi Melody- it feels like you could be right. it feels like your car was well worn when you got it. common causes of overheating are coolant too low, which is what i suspect was the case when you first got it. a stuck closed thermostat not allowing coolant to circulate. i assume you have an electric cooling fan- check to see if your fan motor is fried. you could also have large air pockets inside your cooling system which can give false coolant level. when you pour coolant into your radiator rather than your overflow tank, you introduce air into the cooling system that has to be purged by allowing the bubbles to work their way out through your radiator by squeezing your coolant hose you can assist the escape of these air pockets (with engine running) evidence of a cracked head can be presence of coolant in your engine oil-pull your oil dipstick and look. you say no evidence of coolant leakage, however, look underneath your car and check to see if there is coolant splatter surrounding the underside. it maybe that your car is maintaining enough pressure to run but when engine temps reach a point to where the radiator fan should kick on, and/or the thermostat should open to allow coolant flow and these things dont happen-the result is what you describe with no power and overheating that will eventually overstress your head(s) warped heads can cause the symptoms you describe. you can perform a compression test to help pinpoint a blown cyl. an idea for fixing your car for cheap would be to take it to your local high school auto shop. the only way kids learn the trade is by subject cars. ill bet you can even arrange them to pick it up. the will fix your car for cost. you would only need to supply whatever parts are needed to make the repair. its a win-win situation because they get to learn by fixing your car and you get to use your car for doing mommy things without fear of labor fees. which are around $120/hr. I hope i have helped you with your car good luck!

Posted on Feb 12, 2009

polarcycle
  • 1392 Answers

SOURCE: 1. My grand prix gtp has problems with leaking on the passenger side. I cannot locate the leak. 2. My engine runs too hot when ideling. I changed the thermostat but this did not help. I need your assi

Make sure your cooling fans are coming on when the temp heats up. Are you talking about a leak inside the car or outside? Inside is usaully a drain tube for the A/C stopped up. Outside, look for a water pump or intake gasket.

Posted on May 12, 2009

hankfan18436
  • 62 Answers

SOURCE: 2003 Pontiac Grand Prix SE 6 Cyl - Cooling Fan Not Operating

the fan motor could just be bad, you can test this by removing the fan and connecting a wire to each terminal and to a battery. the wires hooked up one way will spin the fan and the other way will spin the fan backwards so you cant hook it up wrong. I hope that helps you out!

Posted on Jul 17, 2009

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