Question about 1991 Buick Park Avenue

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External temperature reading keeps rising when driving. Inside the car temperature falls no matter if weather is cold. Vehicle: Buick park avenue 1991.

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It sounds like your external ambient temp sensor is bad...located in front of grille.

Posted on Apr 15, 2011

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1994 Buick Lesabre calls for a 160 or 180 degree thermostat


that is the opening temperature for the thermostat
it opens at 160 degrees which is good for hot weather operation or another with 180 degrees which is good for cold weather operations
The differences is 160 opens sooner to start coolant circulation to keep operating temperature low where the 180 keeps shut and allows the operating temperature to rise up as soon as it open the cold air will quickly cool the coolant.

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My 2003 Buick Regal wouldn't start on a very cold day. I came back the next day and decided to shift it out of park and back into park and it started right up. What could cause that to happen? 3800 engine


When you said "it wouldn't start" did it turn over (starter cranking the engine) or did it act like the battery was dead and wouldn't crank, even though all the dash lights lit up?

If it simply didn't crank over but then by you shifting it out of park, then back into park, may indicate a park/neutral switch problem.

It may have been something as simple as the shifter, when the vehicle was last parked, didn't fully engage the park/neutral switch into the park position. BUT by you moving the shifter out and back into park it engaged the switch.

Cold weather can do some strange things sometimes when it comes to mechanical devices. IF it acts up again, simply try the "trick" that worked the last time.

It may just be temperature related and may not give any more problems once the weather warms up.

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You may have developed a vacuum leak that the idle air controller is trying to compensate for. Or, it could also be caused by a dirty mass air flow sensor. You need to post the engine type and the other conditions the symptoms occur. It's hard to diagnose a problem on such limited information. Conditions such as engine temperature, foot on brake, in or out of gear are extremely important factors to take into consideration when solving engine performance problems.

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Why will my 2002 dodge intrepid start perfectly in cold weather, but not in hot weather, or as the temperature rises during the day? Priscilla TravisBefore it would only start in cold weather, and not


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My 2009 Peugeot 308's heating is baffling me when i drive at normal speeds say 30 and above the engine temperature gauge never rises and the heater doesnt work but when im in traffic or parked with th


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Iffwhat extra care should be taken during cold starting


If the vehicle is an manual gearbox, hold the clutch in until the engine has taken properly. If it is a manual rather start i neutral with the park brake on than in Park. Once the engine has started, let it idle for a minute or so before driving off slowly. Until the temperature gauge has at least reached the 1/4 mark, try keep engine revs below about 2500. All the while keep an eye on the temperature gauge, if it rises very sharply and the fan does not come on, there is a possibility that the radiator is frozen and the engine will boil and burst a hose. If the temperature does rise suddenly, stop and carefully feel if the radiator is still cold. If it is, shut off the engine and wait till the radiator has thawed. This will take a while but can be hastened by starting the engine for a few minutes to warm the engine compartment to help thaw the radiator. When water is circulating freely, you should see a sudden drop in temperature. Do not rev the engine too much, the incoming water will be ice cold and could crack something. This is not something that occurs often, especially if you try park the car where air cannot readily blow through the radiator overnight.

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Are there problems with the thermostat gauge not show proper temperture readings. 1999 vw jetta 2.0 gauge shows no temp reading. Is it a bad thermostat and needs to be changed. And can you harm the...


If you are not getting a signal to your gauge, your car can still run. You just won't know if your car is overheating until it is too late. A bad thermostat won't keep your gauge from working. The temperature sensor that sends the signal to the gauge will keep it from working.

The thermostat helps your car in extreme weather. It helps your engine warm up in extreme cold so your heater will work sooner. And it helps you car cool itself off in extreme hot weather. As your engine water temp rises, the thermostat will open allowing the water in the radiator (that has been cooling) to flow into the engine block. The water that was in the block will go into the radiator to begin cooling.

In fair weather, you don't need a thermostat.

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MY HOT AND COLD METER KEEPS RISING AND FALLING


If the fans are electric, then replace the fan control module.
If the fan is belt driven, replace the fan clutch.

There is a chance that the thermostat is failing, but if the temperature fluctyation occurs during driving, as opposed to stopped and idling, then it's probably the fans.

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Heat gauge


Before getting too upset about this, try changing the temperature sender. Can't tell you where it is but it is usually on or near the thermostat housing but some engines have it on the intake manifold or rear of cyl head.

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