Possible throttle position sensor starting to go out?

SmokedRam · Oct 25, 2012

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.

TexasRammer · Oct 25, 2012

Sounds like it... thats the way mine started out. mine eventually threw a code after like 2 months and a ton of other symptoms started coming up

SmokedRam · Oct 25, 2012

TexasRammer said:
Sounds like it... thats the way mine started out. mine eventually threw a code after like 2 months and a ton of other symptoms started coming up

Thanks for the info Nick...I am gonna snag one from Advance tomorrow and put it on this weekend.

I got a coupon code that will lower the price from $35 to $26...and the way I see it, it has a lifetime warranty, so it will be the last one I ever have to buy. Which, is weird for a sensor.

reefguy89 · Oct 25, 2012

your not supposed to clean the throttle bodys with throttle body cleaner your supposed to use brake cleaner.

Sagebrush2500 · Oct 25, 2012

Great thread! I thought sensors just puked out - didn't realize they began to go as described. I love learning new stuff.

SmokedRam · Oct 25, 2012

reefguy89 said:
your not supposed to clean the throttle bodys with throttle body cleaner your supposed to use brake cleaner.

Why is that?

reefguy89 · Oct 25, 2012

SmokedRam said:
Why is that?

it can mess up the sensors. i had a thread on it somewhere let me find it.

**edit** starts at post 6

http://www.ramforum.com/f50/new-intake-diff-between-04-05-a-15507/

SmokedRam · Oct 25, 2012

reefguy89 said:
it can mess up the sensors. i had a thread on it somewhere let me find it.

**edit** starts at post 6

http://www.ramforum.com/f50/new-intake-diff-between-04-05-a-15507/

Ahhh looks like Kenneth was referring to the Hemi TB though, which is different from a 4.7. Anyhoo, I'm gonna pick up a new TPS tomorrow and throw it on Saturday and report back here.

reefguy89 · Oct 25, 2012

SmokedRam said:
Ahhh looks like Kenneth was referring to the Hemi TB though, which is different from a 4.7. Anyhoo, I'm gonna pick up a new TPS tomorrow and throw it on Saturday and report back here.

good deal but how much of a differance is there besides the size? 4.7 is still electric right?

SmokedRam · Oct 25, 2012

reefguy89 said:
good deal but how much of a differance is there besides the size? 4.7 is still electric right?

Maybe the drive by wire stuff? I really don't know to be totally honest.

mgpyomamma · Oct 25, 2012

same with me. replace it with autozone part and good as new

SmokedRam · Oct 25, 2012

mgpyomamma said:
same with me. replace it with autozone part and good as new

Good deal, thanks for the input!

Hooker52 · Oct 25, 2012

So do you have the issue at start up or only at red lights after driving for a while? Sounds somewhat similar to my idle problem I just posted about. Maybe not though. I'm a 5.9 though...just curious about your symptoms.

SmokedRam · Oct 25, 2012

Hooker52 said:
So do you have the issue at start up or only at red lights after driving for a while? Sounds somewhat similar to my idle problem I just posted about. Maybe not though. I'm a 5.9 though...just curious about your symptoms.

Nope, hasnt happened at start up...just every so often when I stop at a redlight, I get an RPM surge.

S2kiHemi · Oct 25, 2012

4.7s have the old cable throttle body's and the Hemis have the electronic throttle body's aka drive by wire. I think in 08 the 4.7s got drive by wires also.

RompinRam · Oct 25, 2012

Mine did the same thing it was the TPS. After that it ran great.

SmokedRam · Oct 25, 2012

RompinRam said:
Mine did the same thing it was the TPS. After that it ran great.

Thanks buddy! Gonna pick one tomorrow and put it on Saturday

RompinRam · Oct 25, 2012

It's not hard to replace either. 20 mins tops. Just take your time handling the sensor haha. And give it time to reset. Took my truck a little bit of running to get it back to normal. But after a lote bit of idled like a champ again

reefguy89 · Oct 26, 2012

RompinRam said:
It's not hard to replace either. 20 mins tops. Just take your time handling the sensor haha. And give it time to reset. Took my truck a little bit of running to get it back to normal. But after a lote bit of idled like a champ again

after you changed it did you reset the computer or just run it till it learned?

TexasRammer · Oct 26, 2012

Mine took a while after I replaced it to return back to normal too. I was pissed at first when I tested it then I tried it an hour later and it was fine from then on. I didnt reset the computer though so that might help.

Possible throttle position sensor starting to go out?

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