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  #1  
Old 01-27-2011, 08:11 AM
stealtharsenal stealtharsenal is offline
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Default 2001 Dodge Ram Loping in Overdrive

Hello,

I have a 2001 Dodge Ram 1500 Quad Cab (8 ft bed) with a 5.9 and noticed as of late the truck has been loping in overdrive and getting terrible gas mileage (on the order of 10-11 mpg on the highway, maybe less) The loping seems to occur between the 1500-3000 rpm mark give or take. Does anyone have experience with this issue or know what could be causing this? The truck has no issues shifting into and out of overdrive. As I stated the only noticeable issues at the present time is just the loping and terrible gas mileage. Any advice on this problem would be greatly appreciated.

Thank You

I also have one other question that may or may not be related. When the truck is at operating temperature and is going down the road or highway say at 2000 rpm, there is a whistling noise from under the hood. Any ideas regarding that? I believe its the power steering on the truck.

Last edited by stealtharsenal; 01-27-2011 at 08:32 AM.
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Old 01-27-2011, 10:38 AM
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RamTech RamTech is offline
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Whistling noises usually indicate a vacuum leak and the loping you describe could also be a symptom.
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Old 01-28-2011, 10:09 AM
stealtharsenal stealtharsenal is offline
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RamTech,

Thank you for the response. Would your suggestion be to replace the vaccuum lines and see if that clears up anything. I will have to get my OBD computer back on the truck as it does have an engine code on. If I remember it was something to do with the evap system, but I am not certain.

Thanks in advance
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Old 02-01-2011, 09:57 AM
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My 98 was doing the same thing. I replaced the throttle position sensor (TPS) as recommended by another member and that took care of the problem. It's a $34 part you can get from Autozone or similar and switch out in under 10 minutes. Its a quick cheap place to start. Good luck!
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Old 02-05-2011, 05:23 PM
stealtharsenal stealtharsenal is offline
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Well the PO code references an EVAP issue. I also notice a rich smell when the truck is idling. I am not having any idle issues or anything like that. I am pretty confident that the TPS is not the issue. My dakota with 5.2L had a TPS issue that caused idle and running issues. I will spend some time going through the Vacuum system.
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Old 02-07-2011, 12:15 AM
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Hmmm...I too smell rich fuel at idle and got horrible mileage on this past tank (maybe 6 mpg) and the tranny is holding the 3-4 shift unless I let up on the throttle then it will up shift.

Any ideas?
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Old 04-10-2011, 06:50 PM
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Quote:
Originally Posted by stealtharsenal View Post
Hello,

I have a 2001 Dodge Ram 1500 Quad Cab (8 ft bed) with a 5.9 and noticed as of late the truck has been loping in overdrive and getting terrible gas mileage (on the order of 10-11 mpg on the highway, maybe less) The loping seems to occur between the 1500-3000 rpm mark give or take. Does anyone have experience with this issue or know what could be causing this? The truck has no issues shifting into and out of overdrive. As I stated the only noticeable issues at the present time is just the loping and terrible gas mileage. Any advice on this problem would be greatly appreciated.

Thank You

I also have one other question that may or may not be related. When the truck is at operating temperature and is going down the road or highway say at 2000 rpm, there is a whistling noise from under the hood. Any ideas regarding that? I believe its the power steering on the truck.



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