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 > 4TH Generation Dodge Ram 2009+ Dodge Ram Trucks > Powertrain > 4.7L (287 cu in) PowerTech V8 Specific Topics


Notices


Latest Vendor News
AutoAnything
Addictive Desert Designs!
Bayou Goat Mounts

Reply
 
Thread Tools
  #1  
Old 12-01-2013, 05:11 PM
Engine3nfd's Avatar
Engine3nfd Engine3nfd is offline
Dodge Ram Forum Newcomer
 
Join Date: Jan 2013
Location: Belleville, NJ
Age: 35
Posts: 20
Gender: Male
Vehicle: 2012 Dodge Ram 1500 Tradesman
Trim Level: Tradesman
Color: Pearl Blue
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 0
Rep:52
Engine3nfd will become famous soon enough
Default 2012 ram 4.7 engine surging at cruising speed

Hi guys, hope someone can help me out. I have a 2012 ram with the 4.7 crew cab, 19K miles, k&n air filter and magnaflow exhuast. I have noticed within the past few weeks that at cruising speed, 30-50 mph, around 1100-1400 rpm, when you apply very little throttle, the rpm/engine is surging or hunting a little, about 75 rpms. i disconnected the battery for 5 hours and when i reconnected it did it again right away. I think it doesnt do it as noticeable if I have the tow/haul mode on, but then it just feels like its jerking a little. no MIL, no other problems. Some have mentioned Torque converter, PCM, just wondering if there is an update on this issue before I take it to the dealer. I got the lifetime warranty on it. Any help will be greatly appreciated.
Reply With Quote
Sponsored links
  #2  
Old 12-01-2013, 05:47 PM
Asur Asur is offline
Dodge Ram Forum Senior Member!
 
Join Date: Mar 2012
Posts: 6,850
Gender: Male
Vehicle: .
Rep Power: 14
Rep:4364
Asur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond repute
Default

Strange because the first thing I thought was to say unplug your battery to reset the system, but you did that, It takes a huge 15 min to swap the OEM CAI to the K&N CAI, I would try to swap back in the OEM CAI and see what happens, also by Having the OEM CAI back on the truck if it still does it, the Dealer can't start pointing the finger at the K&N. JMO
Reply With Quote
  #3  
Old 12-01-2013, 06:02 PM
Engine3nfd's Avatar
Engine3nfd Engine3nfd is offline
Dodge Ram Forum Newcomer
 
Join Date: Jan 2013
Location: Belleville, NJ
Age: 35
Posts: 20
Gender: Male
Vehicle: 2012 Dodge Ram 1500 Tradesman
Trim Level: Tradesman
Color: Pearl Blue
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 0
Rep:52
Engine3nfd will become famous soon enough
Default

its just the air filter, not a CAI, I installed that with 200 miles on the truck, the exhaust i installed at 500, this just started happening about 3 weeks ago.


Hope they dont point fingers at the cat-back exhuast cause I sold the stock one........

Last edited by Engine3nfd; 12-01-2013 at 06:04 PM.
Reply With Quote
  #4  
Old 12-01-2013, 07:25 PM
Asur Asur is offline
Dodge Ram Forum Senior Member!
 
Join Date: Mar 2012
Posts: 6,850
Gender: Male
Vehicle: .
Rep Power: 14
Rep:4364
Asur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond reputeAsur has a reputation beyond repute
Default

Quote:
Originally Posted by Engine3nfd View Post
its just the air filter, not a CAI, I installed that with 200 miles on the truck, the exhaust i installed at 500, this just started happening about 3 weeks ago.


Hope they dont point fingers at the cat-back exhuast cause I sold the stock one........
I have had my Mufflex 18 for almost 2 years and no issues I would not think it was that, could be a defective Oxy sensor. Have you checked your connections to them?
Reply With Quote
  #5  
Old 12-01-2013, 08:38 PM
Hornet Hornet is online now
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2013
Location: Airdrie AB
Age: 53
Posts: 1,144
Gender: Male
Vehicle: 2013 RCSB Ram
Trim Level: ST
Color: White
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 2
Rep:460
Hornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of light
Default

I have the same exhaust,and i have a part throttle lean surge too.
I think the exhaust flows enough to put the motors on the outer edge of the stock computors parameters.
My exhaust went on along with a ported throttle body the day i drove in home from the dealership,had a 120 miles on it,and has had the lean surge ever since
Reply With Quote
  #6  
Old 12-01-2013, 08:58 PM
Engine3nfd's Avatar
Engine3nfd Engine3nfd is offline
Dodge Ram Forum Newcomer
 
Join Date: Jan 2013
Location: Belleville, NJ
Age: 35
Posts: 20
Gender: Male
Vehicle: 2012 Dodge Ram 1500 Tradesman
Trim Level: Tradesman
Color: Pearl Blue
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 0
Rep:52
Engine3nfd will become famous soon enough
Default

I'll check everything I can, im gonna start tonight with putting in the stock air filter which is brand new and seeing if that helps. if it does, maybe the k and n is just dirty enough to create a problem. this problem didnt occur until 3 weeks ago, The cat back magna flow was a bolt on, dual out the passenger side before the tire. I cant see it being an o2 sensor without tripping a DTC. im gonna put it on the scanner tomorrow and see if anything is there. If I can't find anything, im just gonna leave it i guess until something finally gives. its just really annoying, and i dont really see it if its in tow haul mode, so im thinking maybe if i get the PCM reflashed it might fix it, any thoughts?
Reply With Quote
  #7  
Old 12-01-2013, 09:21 PM
Hornet Hornet is online now
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2013
Location: Airdrie AB
Age: 53
Posts: 1,144
Gender: Male
Vehicle: 2013 RCSB Ram
Trim Level: ST
Color: White
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 2
Rep:460
Hornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of light
Default

I'd be more suspicious of the fuel then anything,especially if you haven't changed anything lately.
Winter blend gas can create havoc especially if you're on the ragged edge of the stock computors parameters.
Try throwing a can of octane boost in and see if it makes any differance.

My exhaust is differant,but only in the fact mine goes out the back,with a few more ft of pipe,probably the same muffler,5X22 SI/DO

Last edited by Hornet; 12-01-2013 at 09:25 PM.
Reply With Quote
  #8  
Old 01-20-2014, 08:00 AM
loweredram loweredram is offline
Dodge Ram Forum Newcomer
 
Join Date: Dec 2013
Location: McCalla, AL
Age: 21
Posts: 3
Gender: Male
Vehicle: 2010 Dodge Ram
Trim Level: ST
Color: Red
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 0
Rep:10
loweredram is on a distinguished road
Default

I have a 2010 with factory exhaust and mine is surging, I have factory air intake aswell. Not sure what the problem is. Im going to try an octane booster and see if that helps. Let me know if you come up with anything.
Reply With Quote
  #9  
Old 01-20-2014, 08:04 AM
loweredram loweredram is offline
Dodge Ram Forum Newcomer
 
Join Date: Dec 2013
Location: McCalla, AL
Age: 21
Posts: 3
Gender: Male
Vehicle: 2010 Dodge Ram
Trim Level: ST
Color: Red
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 0
Rep:10
loweredram is on a distinguished road
Default

I just found this.

The most likely cause for this would be a worn throttle [COLOR=green !important][COLOR=green !important]position [COLOR=green !important]sensor[/COLOR][/COLOR][/COLOR]. When the sensor gets worn inside it will start to create small voltage spikes in it's signal. The engine controller sees these spikes as you opening the throttle when you aren't, so the idle goes up along with the voltage.

You may also notice some RPM fluctuation going down the road. When the [COLOR=green !important][COLOR=green !important]TCM[/COLOR][/COLOR] sees these voltage spikes when you are at a steady speed it will think you are [COLOR=green !important][COLOR=green !important]accelerating[/COLOR][/COLOR] so it unlocks the [COLOR=green !important][COLOR=green !important]torque [COLOR=green !important]converter[/COLOR][/COLOR][/COLOR] clutch. After a brief period it will relock the converter. This gives a 2-300 RPM fluctuation in the tach.

This is best seen with a labscope, but sometimes can be seen with a fast voltmeter if you set up to backprobe on the center pin of the sensor. If the voltage is fluctuating with the throttle closed the sensor is bad.

You can also try tapping on the sensor when it acts up. If the idle is fluctuating and tapping on the sensor brings it back, replace the sensor. Unplugging it while acting up should give you some definite results also.

The TPS is mounted to the left side of the throttle body with two Torx screws, easy to replace
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 07:37 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