4rnr

My 88 3.0 5spd 4runner, is having major power issues. Once I drive the truck around for a couple minutes I loose all torque. The truck can barely get out of its own way, UNLESS I push the excelerator to the floor then I can feel the truck instantly jump back to power and it pulls the way it used to. Also as Im accelerating under the light power the truck feels like it is chugging a but. I have replaced the coil, wires, cap, rotor, fuel filter, plugs.

Why do I have to have my foot to the floor for the truck to wake up?

Im leaving for a 700mi round trip on friday.

TNRabbit

Sounds a lot like a bad or misadjusted TPS. Check that it's plugged in and there are no bad wiring issues.

95RunnerSR5

any trouble codes?

4rnr

i dont have diagnostics reader, unless there is some other way to tell.

off to check the tps

95RunnerSR5

if the check engine light is on you can check the codes yourself.

http://personal.utulsa.edu/~nathan-b...26diagnosi.pdf

TNRabbit

There is a way to check the codes..all you need is a paper clip!: http://personal.utulsa.edu/~nathan-b...85diagnosi.pdf

Also here is info on the TPS: http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

TNRabbit

Double post! High five, 95RunnerSR5!

Funk_Runner

*subscribes

95RunnerSR5

yotasavg

hmm this sounds like mine. but his is all the time....interesting.

https://www.yotatech.com/forums/f116/3vze-help-rediculous-116419/

4rnr

Wow, I got 6 codes

14
25
26
41
43
51

25/26 should be because my o2 sensor ripped out of my exhaust and is now dangling beneath the truck

Some of those codes are indicating TPS, some are indicating a starter issue???

By looking at those codes what do you think. Im going to go pick up a feeler guage and do the TPS adjustment. Since I didnt have a feeler I did check the wide open position resistance and it was 4.9Kohms which is good (between 3.3 and 10) But I guess I should check the others.

95RunnerSR5

hmm..i have no idea..igniter maybe? expensive tho

tc

tc

Seriously though - mine has done something like that, but not quite as bad. Seafoam helps, but I think changing the O2 sensor was the real fix.

Note: I didn't really record before/after data, but I seem to be getting quite a bit better mileage since changing the O2 sensor too. With the price of gas lately, it won't take long to earn back the money for the sensor (about $80 IIRC)

snap-on

id pull the codes, pull the ECU fuse (reset the puter, ie clear the codes) drive around and see what you get


TPS and/or timming would a place to start

GM TURBO

I guess I'd stick the O2 where it belongs.

gonzo

X2.
If that o2 sensor is just hanging there that will throw all kinds of s**t off. Fix that, clear your codes and drive it see if you get any codes back

4rnr

Well I checked the 4 points on the TPS and the 1st and 4th positions are within spec. The 2nd and 3rd positions are only readind about 12 ohms it should be 2300 ohms and infinite ohms. So that smells like a short.

As for the o2 sensor. I need a new bung or just that section of pipe with a bung in it and weld it all up then buy a new o2 sensor, and SPLICE it in. Does everyone else not have a connector for the o2 sensor or is it just me or am i retarded

yotasavg

ok. i'm trying to check my tps right now too....i think i'm retarded cause for the life of me, i can't get the damp needles on the prongs to check it.

how'd you just do it? and is the E2 on the top or bottom?

4rnr

e2 is on the bottom