If my TPS is bad...?

[phoenix6]

Ok even after I fixed my timing on my car the car starts, idles around 750 or so (its advanced 14*) but after driving even a few feet, idles back to 900 - 1000, and then after about 10 mins of driving stays around 900.... stilll... so I was running the car here at work at idle and i pulled off the TPS plug....NOTHING happened.... at all... it just stayed at 1000, plugged it in, nothing.... does this mean my TPS is bad or is there something else causing this problem?

 

[CRE]

Have you tested it? http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&Page=101

 

[phoenix6]

dont have a multimeter... thought what I did was a dead give away.... lol

 

[CRE]

dont have a multimeter... thought what I did was a dead give away.... lol

Yup, something's wrong...

It's indicative of a faulty IDL switch in the TPS, but without proper testing I'm not going to say that's it... It could be a problem with the harness connector, the harness, the ECU and so on.

 

[phoenix6]

Yup, something's wrong...

It's indicative of a faulty IDL switch in the TPS, but without proper testing I'm not going to say that's it... It could be a problem with the harness connector, the harness, the ECU and so on.

crap... lol there goes another thing to fix b4 I put in my Nitrous

 

[CRE]

<sarcasm>Oh, just say "the hell with it"! No one who works on these cars makes sure they're completely sound and without problems before they start trying to make big power.</sarcasm>

Seriously though, just go pickup a cheap multimeter at Home Depot or Radio Shack, even a $10 MM is better than just throwing parts at an old car. I'd recommend getting a better MM down the road, but a cheapie will do just fine for right now.

 

[phoenix6]

<sarcasm>Oh, just say "the hell with it"! No one who works on these cars makes sure they're completely sound and without problems before they start trying to make big power.</sarcasm>

Seriously though, just go pickup a cheap multimeter at Home Depot or Radio Shack, even a $10 MM is better than just throwing parts at an old car. I'd recommend getting a better MM down the road, but a cheapie will do just fine for right now.

Alrighty Ill do that, thanks man you've answered alot of questions for me lately, I really appreciate it. I have another regarding this however, how bad in the long run is a bad TPS? Also will it contribute to small vibrations in idle.

 

[CRE]

How bad depends on the extent of the problem.

There are a hundred things that can cause irregularities in the idle.

Just get a multimeter and test the TPS first. Test the calibration too, it may simply need a little tweaking with a feeler and multimeter to bring it back to spec. You might find that fixing this only takes a $10 multimeter and a $3.99 feeler.

 

[phoenix6]

How bad depends on the extent of the problem.

There are a hundred things that can cause irregularities in the idle.

Just get a multimeter and test the TPS first. Test the calibration too, it may simply need a little tweaking with a feeler and multimeter to bring it back to spec. You might find that fixing this only takes a $10 multimeter and a $3.99 feeler.

Feeler gauges I have at work, we MIGHT have a mm, Im gonna ask tomorrow when I go in, we closed early today so no ones up there. After I check those, if its neither, how would I test my ECU for this problem? lol I see masses of money coming through... Oh also, I know i have vibrations from my fan missing a blade, but would that throw off idle too?

 

[CRE]

Ack, running a fan with a missing blade! <gasp> I suppose it could contribute to the car feeling rough, especially when the oscillations are at a lower frequency and the engine's trying to run with as little power as possible. I'm not 100% sure though, it's not something I've ever (or would ever) tried.

 

[phoenix6]

Ack, running a fan with a missing blade! <gasp> I suppose it could contribute to the car feeling rough, especially when the oscillations are at a lower frequency and the engine's trying to run with as little power as possible. I'm not 100% sure though, it's not something I've ever (or would ever) tried.

Eh, Im working on it haha kinda had no choice, I need to find a 7 blade fan for cheap, asap.

 

[CRE]

I understand, it's one of the many joys of having a older car for a DD.

 

[phoenix6]

I understand, it's one of the many joys of having a older car for a DD.

Yup, in the next 3 - 5 months shes getting spoiled as hell, shes gonna be nice now that I practically have a shop at my hands on my days off. My supra really is an anomally with stories no one would believe.

 

[jdub]

Might want to read this on the TPS
http://www.mkiiitech.com/forums/viewtopic.php?t=912

 

[phoenix6]

Might want to read this on the TPS
http://www.mkiiitech.com/forums/viewtopic.php?t=912

part way into this Im already thinking its bad, cuz Im running rich as well lol

EDIT: Read it all, Im convinced hahaha

says you wont notice much more than a higher idle (like me) if its broken.. crap, how much is this gonna cost just to replace TPS if thats all it is?

 

[jdub]

They're $75 new from Jay Marks Toyota.

 

[phoenix6]

Oh, thats not that bad, I have a employee discount here in GA now so Ill look into that, and a fan blade... ok and a shroud... LOL (CRE is shakin his head right about now)

 

[CRE]

(CRE is shakin his head right about now)

And I'm still shaking it. TEST IT! I'm sure JJ would agree.

 

[phoenix6]

And I'm still shaking it. TEST IT! I'm sure JJ would agree.

I am tomorrow. I will post results...

BTW I promise my supra isnt mistreated or as ghetto as your thinkin haha, its actually fairly clean.

 

[phoenix6]

ok... TPS workin ok now, dont ask me how, but the connector is loose ,I need to ziptie that bitch on there.

In other news, I found this Pull apart do it yourselfer junkyard near here... they have 1 MKIII and 12 Cressidas, so I should be getting a new fan blade and shroud VERY soon hahaha and maybe some other parts... they re cheap as fuck!