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14 Posts
Hello Everyone!
I'm hoping that someone here may have some insight on the following situation. I will be going to the dealer on Monday but thought I'd try to get some input here as well. Truck has a 32, 000 miles and no CEL light.
When I have the AC on max and the AC fan fan on high, the truck shakes when coming to a stop. I blame this due to the fact that rpms drop to about 490 causing the truck to shake. Once the truck detects the drop in rpms (I assume this is what happens), the rpms pick back up to about 550 or so, and the idle smooths out. It seems to be worse when it is hot outside. Now that temps have cooled a bit, it is not as noticeable. As I increase fan speed when having the AC on, the shake becomes more and more noticeable when stopping. The AC compressor clutch engages just fine, AC blows nice and cold air. One day, when coming to a stop, the truck shook so bad, my stability control light started flashing, and then turned off when the idle smoothed out. Other than this, all is great. I have no idea if a sensor somewhere could be affected by the summer heat and not reading right? I can't see too much amperage being pulled by ac fan or compressor, or radiator fan as that means fuses should be going out. But I could be wrong.vAs I mentioned above, all is good until I turn the AC on and put the fan speed on higher speeds. Lower fan speeds and AC on do not cause the truck to shake. Worse in hot days, barely noticeable when cool outside. Maybe the idle is not set right on the truck? Idle set too low perhaps? MAP sensors? Throttle body? Any input will be highly appreciated!!! Thanks!!!
I'm hoping that someone here may have some insight on the following situation. I will be going to the dealer on Monday but thought I'd try to get some input here as well. Truck has a 32, 000 miles and no CEL light.
When I have the AC on max and the AC fan fan on high, the truck shakes when coming to a stop. I blame this due to the fact that rpms drop to about 490 causing the truck to shake. Once the truck detects the drop in rpms (I assume this is what happens), the rpms pick back up to about 550 or so, and the idle smooths out. It seems to be worse when it is hot outside. Now that temps have cooled a bit, it is not as noticeable. As I increase fan speed when having the AC on, the shake becomes more and more noticeable when stopping. The AC compressor clutch engages just fine, AC blows nice and cold air. One day, when coming to a stop, the truck shook so bad, my stability control light started flashing, and then turned off when the idle smoothed out. Other than this, all is great. I have no idea if a sensor somewhere could be affected by the summer heat and not reading right? I can't see too much amperage being pulled by ac fan or compressor, or radiator fan as that means fuses should be going out. But I could be wrong.vAs I mentioned above, all is good until I turn the AC on and put the fan speed on higher speeds. Lower fan speeds and AC on do not cause the truck to shake. Worse in hot days, barely noticeable when cool outside. Maybe the idle is not set right on the truck? Idle set too low perhaps? MAP sensors? Throttle body? Any input will be highly appreciated!!! Thanks!!!