DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

Go Back   DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum > Dodge Ram Forum - Help Zone - Dodge Ram Problems, Complaints, & Solutions - Maintenance & Re > 3RD Generation Dodge Ram 2002 to 2008 Dodge Ram Trucks > Powertrain > 4.7L PowerTech V8 Specific Topics


Notices


Latest Vendor News
AutoAnything
Addictive Desert Designs!
United Radio
Bayou Goat Mounts

Reply
 
Thread Tools
  #1  
Old 04-01-2011, 03:51 PM
bigdaddyII's Avatar
bigdaddyII bigdaddyII is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2009
Location: Southern, Louisiana
Age: 32
Posts: 565
Gender: Male
Vehicle: 2012 Ford F-150
Trim Level: XLT
Color: Metallic Blue
Rep Power: 6
Rep:91
bigdaddyII will become famous soon enough
Default Fluctuating idle and disappearing ATF+4

So my truck started doing a new piss me off the other day. In hindsight this has been going on since I cleaned the throttle body a few months back, but is now getting worse. Just after cleaning the throttle body, on cruise at 70 mph, I can feel the idle play back and forth every couple seconds. It will do this for a while and then stop.

Within the past week, when I come to a stop or put it in park idle will go down to 500 or so (normal), but it will then go up to 1200 suddenly, then back down to 400 then back up to 1500 (not normal), it will do this for a few seconds then stop. I have no codes or other tells.

I searched and only came up with problems with the engine dying. Someone suggested it could be my torque converter continuosly locking and unlocking. I checked the fluid cold, showed normal. I checked the fluid hot and it was low 3/4 of a quart or so. I topped up and now truck runs like normal. However, now that I was paying attention, I noticed something I had gotten used, but it did do since I bought it. When I come to a stop the RPM will dip to 3-400 and then level off at 500. I can live with that. I realize that a 4wd flat filter could have been put in there and they are shorter then the 2wd filter and when it gets low the truck could be sucking air causing it to act weird. It is due to be changed again in 2k miles so I will see then.

My concern is where is my transmission fluid going? I had the fluid and filters changed just after buying the truck and a few months after that I was down a half quart or so. I just figured it was from topping off when I had the filters changed and the truck not ever being driven. But now it was down another 3/4 quart. Im wondering where it could be going as I witness no drips on the ground whatsoever. I notice ANYTHING my truck drips as I have a 4.7 liter and blown HG is always at the back of my mind so I am always looking at the exhaust (dumped) and I notice nothing. The closest I can come is the transmission tail shaft seal is seeping, I noticed this when I changed my UV joints but I cant be sure that just wasnt from me bumping it when I took the driveshaft down. Any ideas?
__________________
Sure it'll suck, but it'll make you a man

Last edited by bigdaddyII; 04-01-2011 at 03:53 PM.
Reply With Quote
Sponsored links
  #2  
Old 04-04-2011, 01:28 PM
bigdaddyII's Avatar
bigdaddyII bigdaddyII is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2009
Location: Southern, Louisiana
Age: 32
Posts: 565
Gender: Male
Vehicle: 2012 Ford F-150
Trim Level: XLT
Color: Metallic Blue
Rep Power: 6
Rep:91
bigdaddyII will become famous soon enough
Default

Oh yeah, I level the truck between last time I checked it too. That in itself might explain something. Thanks for all the ideas guys.
__________________
Sure it'll suck, but it'll make you a man
Reply With Quote
  #3  
Old 04-04-2011, 01:40 PM
latitud's Avatar
latitud latitud is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jun 2010
Location: Southwest VA
Age: 43
Posts: 571
Gender: Male
Vehicle: 2010 Dodge Ram
Trim Level: SLT
Color: Deep Water Pearl
Rep Power: 0
Rep:71
latitud will become famous soon enough
Default

Are you checking the trans fluid level in neutral?
Since the idle problem started after cleaning the throttle body, I am betting you sprayed either the IAC (idle air conrol) or the throttle position sensor directly with throttle body cleaner. I read somewhere that the liquid gets past the seal and ruins the sensor.
__________________
2010 Dodge Ram, 5.7 Hemi, Crew Cab
Reply With Quote
  #4  
Old 04-04-2011, 02:14 PM
bigdaddyII's Avatar
bigdaddyII bigdaddyII is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2009
Location: Southern, Louisiana
Age: 32
Posts: 565
Gender: Male
Vehicle: 2012 Ford F-150
Trim Level: XLT
Color: Metallic Blue
Rep Power: 6
Rep:91
bigdaddyII will become famous soon enough
Default

That may have happened, but it went away after a few days until this past week. It doesnt do it since I added the transmission fluid that was low. When I checked the transmission fluid the truck had been drivin 10 miles or so, and was at operating temp in neutral on level ground. I also shifted between all the gears first for a few seconds.

I also rechecked the tailshaft seal and it is damp as it had been but didnt look like any kind of leaking was taking place. I brought up the 3" level because I thought about it when checking my oil yesterday. Since I leveled it my engine oil marks higher on the dipstick with the usual amount of oil in it. I noted this at first change after the level and also noticed a change in the coolant level in the bottle when I leveled it. Thats what made me wonder if that would have any effect on transmission fluid as well. Makes sense to me anyway.
__________________
Sure it'll suck, but it'll make you a man
Reply With Quote
  #5  
Old 04-04-2011, 09:26 PM
latitud's Avatar
latitud latitud is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jun 2010
Location: Southwest VA
Age: 43
Posts: 571
Gender: Male
Vehicle: 2010 Dodge Ram
Trim Level: SLT
Color: Deep Water Pearl
Rep Power: 0
Rep:71
latitud will become famous soon enough
Default

I am betting the trans fluid seeming to make things better is just a coincidence. Unhook the battery for about 5 min. turn your lights on after unhooking the battery to dissipate any remaining power. Hook it back up and this will make you TPS recalibrate itself...not sure on 2002 but you may have to turn the key to on - dont start - and push the throttle all the way down and then release.

As for the IAC, remove it and clean the tapered end really good and also the seat in the throttle body..remove all the carbon. The throttle body gasket is reusable, but you could have damaged it and it is simply sucking vacuum past the seal.
__________________
2010 Dodge Ram, 5.7 Hemi, Crew Cab
Reply With Quote
  #6  
Old 04-05-2011, 09:16 AM
bigdaddyII's Avatar
bigdaddyII bigdaddyII is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2009
Location: Southern, Louisiana
Age: 32
Posts: 565
Gender: Male
Vehicle: 2012 Ford F-150
Trim Level: XLT
Color: Metallic Blue
Rep Power: 6
Rep:91
bigdaddyII will become famous soon enough
Default

I will do the reset today, and remove the TB again this weekend to check on that seal.
__________________
Sure it'll suck, but it'll make you a man
Reply With Quote
  #7  
Old 04-11-2011, 02:11 PM
bigdaddyII's Avatar
bigdaddyII bigdaddyII is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2009
Location: Southern, Louisiana
Age: 32
Posts: 565
Gender: Male
Vehicle: 2012 Ford F-150
Trim Level: XLT
Color: Metallic Blue
Rep Power: 6
Rep:91
bigdaddyII will become famous soon enough
Default

Update. Problem was the TPS. Runs 100% better now, even cured a couple other peculiar behaviors that have been present for a little while.
__________________
Sure it'll suck, but it'll make you a man
Reply With Quote
  #8  
Old 04-11-2011, 02:15 PM
latitud's Avatar
latitud latitud is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jun 2010
Location: Southwest VA
Age: 43
Posts: 571
Gender: Male
Vehicle: 2010 Dodge Ram
Trim Level: SLT
Color: Deep Water Pearl
Rep Power: 0
Rep:71
latitud will become famous soon enough
Default

Congrats on the fix.
__________________
2010 Dodge Ram, 5.7 Hemi, Crew Cab
Reply With Quote
  #9  
Old 04-11-2011, 03:35 PM
bigdaddyII's Avatar
bigdaddyII bigdaddyII is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2009
Location: Southern, Louisiana
Age: 32
Posts: 565
Gender: Male
Vehicle: 2012 Ford F-150
Trim Level: XLT
Color: Metallic Blue
Rep Power: 6
Rep:91
bigdaddyII will become famous soon enough
Default

Thanks. Makes a big difference for $30 and 20 minutes.
__________________
Sure it'll suck, but it'll make you a man
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Advertisement






All times are GMT -4. The time now is 08:36 AM.


= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors


=Gigathreads Network=
CLUBS MOPAR NATION DSM GPMM MAMM JAM
DIESEL Diesel Forum      
CHEVY Chevy Camaro Forum Chevy Volt Forum    
CHRYSLER Chrysler 300C Forum      
DODGE Dodge Avenger Forum Dodge Caliber Forum Dodge Challenger Forum Dodge Charger Forum
  Dodge Circuit Forum Dodge Hornet Forum Dodge Magnum Forum Dodge Nitro Forum
  Dodge Ram Forum Dodge Dakota Forum Dodge Durango Forum Dodge Dart Forum
FORD Ford Raptor Forum Ford F150 Forum Ford F100 Forum  
JEEP Jeep Forum      
PONTIAC Pontiac G8 Forum      
SRT SRT Viper Forum SRT Cuda Forum