Edmunds Answers



  • karjunkie 02/16/10 10:30 am PST

    Usually, with a lot of temperature fluctuations, the problem is the thermostat which is easy and inexpensive to fix. When you replace it, make sure to flush the cooling system at the same time. It should be done every 2-3 years anyway. As to the rough running, do you have a check engine light on? If so ask for a free OBDII scan at any large chain auto parts store like AutoZone, Pep Boys, etc. This will give you the codes of what specifically is wrong. This will save you some money as you will know exactly what parts need repair or replacement. If you need help with the codes come back here and we will help you with those. Good luck!

  • ray80 02/16/10 11:50 am PST

    For your 2001 Aztek, sometimes warm/sometimes cool heater could also mean low on coolant. On this vehicle it could be due to leak, in particular the lower intake manifold gaskets if they haven't been replaced with updated part. If this is the case (low coolant) it can lead to overheating and perhaps blown headgasket (which could lead to copious amounts of white smoke from tailpipe). For the gas gauge, in most vehicles first guess would be sensor in fuel tank, but on yours it is also quite likely an issue with the c305 connector (Its a pass-trhough connector on florr to rear of drivers seat and connections can get corroded)


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