High idle and slipping overdrive
#1
06-01-2014, 05:28 PM
Join Date: Jan 2011
Location: Northern Ontario
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High idle and slipping overdrive
So the old dodge has been running a little funny for the last day or so. Did a quick search on here and couldn't find anything. Truck idles high in park or neutral and it fluctuates between normal and high rpm. I don't have a tach but I would guesstimate 800- 1200ish rpm. Put it into gear and its idles normal. Then when you get doing and you're doing highway speed (60mphish) it had a very hard time staying in overdrive. It changes from 3rd to 4th randomly but I would say usually every 7 seconds and then the odd time stay in 4th for like 30 seconds then go back into 3rd. It appears to do it at every little bump on the highway. With overdrive off it will do it with 3rd and 2nd. Not sure if these problems are linked but they started happening at the same time so I assume so. Also, my gas mileage has become painfully low. I burnt 1/4 tank (and I have the larger tank) in 30 miles heading to work. Only one way. Burnt the next 1/4 tank coming home. I think this is also linked to the other issues. Any ideas?
#2
06-01-2014, 05:32 PM
#3
06-07-2014, 06:57 PM
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Without starting another thread I figured I would just post this here because it may be related.
HeyYou, haven't had a chance to check the TPS yet.
As mentioned earlier the truck has been running a little rough. It's a little better now (haven't done anything.)
Checked my oil last week and it was good. Oil pressure was good too. Driving home today and I realized my oil pressure guage was reading low. Got home checked my oil and its not even reading on the stick.. Where did my oil go? Am I safe to assume I may be looking into a plenum fix?
HeyYou, haven't had a chance to check the TPS yet.
As mentioned earlier the truck has been running a little rough. It's a little better now (haven't done anything.)
Checked my oil last week and it was good. Oil pressure was good too. Driving home today and I realized my oil pressure guage was reading low. Got home checked my oil and its not even reading on the stick.. Where did my oil go? Am I safe to assume I may be looking into a plenum fix?
#4
06-07-2014, 10:15 PM
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Join Date: Oct 2010
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Look at the lower bottom of your engine where it meets up to the tranny. If you have a bunch of oil there, you may need a rear main seal. It's not a real hard fix. Though, yes, a leaking plenum gasket will help burn it up. I did both repairs and the rear main seal was the heavier leaker by far.
