gweelie

I have a 92 4runner v6 4x4 I recently picked up. The thing drives nice but the idle is too high, around 1500 rpm warmed up. I adjusted the idle speed adjustment screw all the way down with no luck. I'd much rather try to resolve this problem on my own before taking it to a shop, any suggestions on what to try first? Thanks.

GranVille-4crawler

Check your vac lines.

gweelie

Thanks. visually all seems ok, im going to look a bit more extensively today. I've heard of the plug on the side of the throttle body, the real name has slipped my mind, getting dirty or going bad causing a very similar result. Does anyone know how to test the plug, i.e. how much resistance in ohms to be looking for? any more advise is appreciated

MaK92-4RnR

how cold is it? mines been up that high but only once and it was a cold ass morning.

gweelie

oh its warm, somewhere close to 80 and never below 65.

Blue_petersen77

That's the TPS: throttle position sensor. and that could cause your problem. Try adjusting it.

Blue_petersen77

Also make sure the O2 sensor wire isn't hanging on or touching the exhaust.

gweelie

im sure i could look it up but if someone could explain how to adjust the tps I'll give it a go.

4Crawler

iTrader: (3)

http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

gweelie

well to the best of my knowledge I got no resistance in the tps, so I would assume its bad, but if one were to go out in such a manner, would the high idle be the only symptom. Please forgive my lack of knowledge, I don't do much work with electronics of any kind.

Thanks again for all of the help.

4Crawler

iTrader: (3)

Well, there are several TPS resistance tests, which one(s) were 0?

Symptoms of a bad/mis-adjusted TPS:
- http://www.4crawler.com/4x4/CheapTri...roubleshooting

gweelie

i re-checked it, test
#1, vta-E2 showed 810ohms
#2, idl-e2 no resistance
#3, idl-e2 no resistance
#4, vta-e2 showed 810-830 ohms
#5, vcc-e2 no resistance

4Crawler

iTrader: (3)

If you are confident in your measurements:
- http://www.4crawler.com/4x4/CheapTri...oUseAnOhmMeter

Sounds like a bad TPS. If so, you would likely have some stored trouble codes in the ECU related to that part:
- http://www.4crawler.com/4x4/CheapTri...CheckConnector

gweelie

Well thanks for the help. I'll try to pick one up soon and see if that resolves my troubles.

gweelie

one last question for anyone who may have replaced a tps, is there a particular brand or place to order one from that anyone could suggest that is a decent part? thanks again.

gweelie

just in case anyone has this knowledge, I called a family friend who owns a shop near-by, described my issue and asked about the tps... he found it odd to not have a c.e.l. showing, anyone have this issue with no c.e.l.?