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10-25-2012, 05:15 PM
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#1
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Super Moderator
Join Date: Oct 2010
Age: 45
Posts: 6,570
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Possible throttle position sensor starting to go out?
So, Monday, I noticed that sometimes (maybe once every 10 redlights) after I come to a stop, my RPMs will surge a little above and below my normal idle RPM.
Everything I have searched for, leads me to believe that my TPS is starting to wig out on me, what do you guys think? It hasn't gotten to the point where it's throwing a CEL yet, but I'm the kind of dude who doesn't wanna wait til it does.
Truck info:
2005 Ram 1500
4.7 engine
53,8xxx miles.
I cleaned the throttle body the weekend before last, but only cleaned the throttle plate and sprayed TB cleaner on a rag and cleaned the inlet. Never sprayed anything anywhere else on the TB. Truck ran fine after that, til this past Monday.
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10-25-2012, 07:57 PM
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#2
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V6 Member
Join Date: Dec 2010
Location: Naples
Name: Ron
Age: 65
Posts: 162
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I would Try an Induction service first...probably not TPS...if anything Idle air control but I think it 's just still dirty in there
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10-25-2012, 08:27 PM
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#3
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Newb
Join Date: Aug 2011
Location: Southwest MS
Age: 37
Posts: 45
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I had this happen after I cleaned mine once. I cleaned it one more time real well using almost a whole can of tb cleaner focusing more around where the idle air control valve is and around the throttle position sensor. I let it dry out all the way then put it back on. Problem was solved. I guess the valve was dirty and having issues opening or closing. I was just glad it cleared up.
You may can try resetting the PCM. Good luck.
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Last edited by speedy; 10-25-2012 at 08:30 PM.
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10-26-2012, 03:20 PM
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#4
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Cummins Member
Join Date: Nov 2010
Location: Palm Harbor Florida
Name: Lou
Age: 65
Posts: 2,861
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Thanks Adam your problem is contagious day before yesterday going to work my truck started to act like i was feathering the throttle at speed [200-300 rpms] today it was doing it worse and at speed and idle,coming to a light slow to a stop rpms at 900 drop to 600 surge to 700/800 drop back to 600 and stay there. Gonna change the TPS and clean the shit outta the throttle plate,IAC ect.
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__________________
 Redneck engineerin beat to fit paint to match  :
1966 barracuda 273 auto
2001 dodge ram 1500 quad cab
2013 Hyundai Elantra
2015 Hyundai Genesis 3.8 Coupe
All housed at the redneck mansion.
USAF Fighter Aircraft Mechanic 1979-1989
 
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10-26-2012, 04:05 PM
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#5
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Super Moderator
Join Date: Oct 2010
Age: 45
Posts: 6,570
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HAHA, I picked up my new TPS today on the way to work...seems to be doing it worse now with the surging. It stalled on me twice last night on the way home, when slowing down coming to redlights.
Seems as though my problems are textbook TPS symptoms. I am gonna install it tomorrow and report back here.
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10-26-2012, 05:37 PM
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#6
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V6 Member
Join Date: Apr 2011
Age: 43
Posts: 406
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My vote is IAC got some crud in it when ya cleaned the tb... I would spray the crap out of it be gentle with it they are easy to break.
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__________________
NEMESIS PRIME
2006 Ram SRT10 RC BBC
Born On 05/16/06 1:00am
479HP ; 517TQ
Mopar Perf. Comp. Coupe Cam w/H.S. RRs & Comp. Cams VSs w/Pushrods, Mopar Headers, Mopar Perf. PCM, Mopar (Borla) exhaust, Mopar Cold Air Intake, Bedrug, 170 Deg. Tstat, Speedhut Rev. A/F & Fuel Press. Gauges, JTS Billet TB, JTS V.C. Spacers, JTS Screamon Demon Coils, JTS Ignition Wires, JTS Catch Can, JTS radiator pipe, JTS SS Brake Lines, JTS PS Line & Oil Line Kit, & JTS Shifter#5 w/Pistol Grip & Tonys Magic Touch!
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10-26-2012, 05:49 PM
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#7
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V6 Member
Join Date: Dec 2010
Location: Naples
Name: Ron
Age: 65
Posts: 162
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TRYED TO SAVE YOU SOME MONEY....CLEAN OUT TB and IAC....this is not a normal symptom of TPS
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10-27-2012, 12:30 AM
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#8
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Florida Chapter Vice President
Join Date: Jan 2011
Location: FL
Name: Daniel
Age: 36
Posts: 3,354
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I dunno if this is related but I have always read to not use throttle body cleaner when cleaning, suppose to use non-chlorinated brake parts cleaner. Maybe that's what caused it?
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__________________
2013 Chrysler 300C
2010 Avenger (REVENGE)
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10-27-2012, 01:41 AM
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#9
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Super Moderator
Join Date: Oct 2010
Age: 45
Posts: 6,570
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Only reason why I am stuck on it being the TPS is because I have personally talked to 3 other 4.7 owners that experienced the same exact symptoms I am, and they replaced the TPS for it to be good as new.
Daniel, I heard that too, however that is with the Hemi throttle bodies, since the TPS is not serviceable in them, the brake cleaner doesn't allow them to be harmed .
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Last edited by SmokedRam; 10-27-2012 at 09:43 PM.
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10-27-2012, 06:36 PM
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#10
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Super Moderator
Join Date: Oct 2010
Age: 45
Posts: 6,570
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New TPS installed...all surging and stalling is now GONE...she purs like a kitty right meowwwww....lol
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