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Car Forum / Dodge / Dodge Trucks / February 2006Is this normal for '99 Ram 1500?
When I have the a/c or fan on and accelerate really fast, the air will stop blowing out the front vents and instead blow out the vents under the windshield. As soon as I lift my foot off the gas, it returns to blowing through the front vents. Step on the gas again and it'll go back to the windshield vents.... is this normal in this truck? Also, I have size 225/75R-16 tires on my truck. Would it be OK if I put 245/75R-16 instead? Or are they too wide for the current rims? No, it indicates either a bad check valve or a minor vacuum leak.  SignatureIf at first you don't succeed, you're not cut out for skydiving > When I have the a/c or fan on and accelerate really fast, the air will > stop blowing out the front vents and instead blow out the vents under [quoted text clipped - 4 lines] > Also, I have size 225/75R-16 tires on my truck. Would it be OK if I put > 245/75R-16 instead? Or are they too wide for the current rims? Mine has done that ever since the dealer worked on the ac 3 years ago. I have no idea where to even start looking for the leak. > When I have the a/c or fan on and accelerate really fast, the air will > stop blowing out the front vents and instead blow out the vents under [quoted text clipped - 4 lines] > Also, I have size 225/75R-16 tires on my truck. Would it be OK if I put > 245/75R-16 instead? Or are they too wide for the current rims? > When I have the a/c or fan on and accelerate really fast, the air will > stop blowing out the front vents and instead blow out the vents under [quoted text clipped - 4 lines] > Also, I have size 225/75R-16 tires on my truck. Would it be OK if I put > 245/75R-16 instead? Or are they too wide for the current rims? Most likely a vacuum leak. Most common place for a leak is the small line that runs from the manifold underneath the air cleaner to the cruise control module thats under the battery. Corrosion from the battery gets onto the line causing it to leak. Does your cruise control operate normally? On mine it would turn on indicated with the Cruise light on the dash but would not maintain speed. After replacing the line the cruise now works and my A/C vents no longer flip when accelerating. > Most likely a vacuum leak. Most common place for a leak is the small > line that runs from the manifold underneath the air cleaner to the [quoted text clipped - 3 lines] > light on the dash but would not maintain speed. After replacing the > line the cruise now works and my A/C vents no longer flip when accelerating. Cruise works fine on mine. |
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