Symptoms of faulty TPS?
 

Hey all, just wondering if anyone can tell me what some of the minor symptoms of a faulty TPS are.
Thanks

Symptoms include:

- Wandering idle ( 800 at one stop light, 1000 at the next)
- Bad mpg (lol?)
- Poor throttle response
- Lack of drop in idle when TE1 and E1 connectors are jumped

Unplug the TPS and if it runs better, you got some work to do.

My issue is (and I have a bad TPS I tested it) is that the truck idles fine on a cold start but as soon as it warms up and I go into driver the truck starts to shake/run like crap.

I had all the symptoms listed about when my TPS took a crap...

Like Jay said, I unplugged mine and left it unplugged for 3 days till I got a new one cause it ran so much better.

So try that first and see what happens.

Good luck

Ya I don't think my TPS is as bad as that yet...when I unplug my TPS the car runs worse and I don't accelerate well at all either.

might not only be a tps issue.. on my trail rig i unplug the tps it runs great,,plug it in it runs like ass.. so i dont plug it in!
but this is a 22re

haha.

Glad someone posted this. I think mine is crapola also. Tried to adjust it via 4crawlers site but my volt meter won't give a steady reading so I think it's gone.

Mine is hard to start, will turn the key upwards of 5 times and then when it does decide to run it will shudder for about 10-15 seconds then jump up to 1500 RPM. Once it warms up it will settle at 1000, and when it has been running I sit at stop lights and it drops to 7 or 800. Now that I know you can disconnect it, I'll try that tomorrow :D

I can't belive one of you smart asses forgot this? "If you don't turn in your TPS then you get in trouble with lumberg"

Sorry /BS

Normal idle should be around 800RPMS +/- 50 RPMS according to the FSM. Try the jumping of the connector trick while the truck is warmed up/running and see if the idle drops. Like I said once I unplugged my TPS the car ran like complete ass especially going uphill.

I also found it a LOT easier (3VZE) to take off the throttle body and use my ohmeter to measure what needed to be measured. I was able to re-use my throttle body gasket as well.

is it a bad thing to run the car without the TPS plugged in?

Mmmyeah....about those TPS reports....:chairfall


BoostinChick...

This is debatable, but I believe you may be seeing the results you are by unplugging the TPS is because it's on the same circuit as the auto tranny. I'm forgetting at the moment exactly how this is, but it has some management over the tranny and consequent engine load. Sorry for the vaguery. I suppose I should get more details, but I'm feeling too lazy at the moment.:)

If you have an auto tranny, see above post. Plus, IIRC, it affects......or can affect.....tranny shifting. That's about the extent of it other than fuel management.

Lumberg stands coreected... for the first time in his life...

Attachment 181677

Ummmm YEAAAAH........

Gawd....that movie kept me in stitches. "oooo....oooo". :lof:

My TPS worked just fine .. along with other units I tested .. my problem turned out to be the throttle body . throttle body shaft bushings to be exact ..

seems with th 260K I have on my unit , like a carb , the shaft bushing have warn , and now creating a vac issue .

Wow....that's a new on me. Never heard of that happening. Something to keep in mind, I guess.

So, how'd you figure out it was the shaft bushings? What clues were there?

That makes sence Corey. I might have to check mine, seemed ok but better safe then sorry!

sorry to get off topic, but what in the name of all that is holy is up with your new avatar thook?

:lof:

please tell me that's not really you...

:laugh: No, it's not me....although, rather similar in features. I'm much thinner, though. And, were that me, I wouldn't be wearing underwear.

(Too much info? :nerd:)

About the avatar and where it came from........that's courtesy of a4runnerfreak....aka Tony the Mobster. I thought it was funny and too much like my silly side. So, there it is. Viewable for all. I've been pondering a change, though.

had to come out of the "oil cap removed" thread, lol

Ding, ding....we have a winner ladies and gentlemen. :bigok:

More info on this please!

The only way I know of testing for TB leaks is by doing what my world likes to call a "boost leak test". It's where you hook up compressed air to the TB and force air through hearing for any leaks.

I just wanna add that BoostinChick's TPS problem appears to be that it's reading constantly at idle even when it's not (the IDL signal to the ECU is not clearing when the throttle is opened).

what didn't come out of that thread.

:lol: Good taste!

HAHAHAHA

tps
 

Hell I would have guessed the engine wouldn't even idle with it unplugged.

I disconnected my TPS today and the idle bumped up a bit (haven't test driven yet while it's diconected), seemed smoother so I'm guessing that's a good thing (except for the TPS being bad). When I plug it back in the idle drops to about 800 or 1000 and is slightly rough. Since I've been here in Mexico I only get about 130 miles per tank while in the US I was getting about 220 miles to a tank. I know part of the reason can be the crappy gas, but someone mentioned too that I check my TPS.

I'm in Mexico at least for the next 2-3 months and the chances of me finding the TPS here and at a decent price is about impossible. I could have one mailed to me but I'm not too sure I'd even receive it.

So if I were to drive around with it disconnected would that harm anything on my engine?

Is this the movie you guys were talking about?

http://www.youtube.com/watch?v=atHWASn_ygo

no, you'll just get HORRIBLE mileage