walidcheb

Hi all, i went to scan my 93 runner for faults, the scanner showed NO FAULTS but when the mechanic opened the Data stream while engine is turned on it showed differences between left and right (which i suppose are the left and right cylinders).
Please see attached photos.
Pic 1- Left Air/Fuel and Right Air/Fuel
Pic 2- L O2 sensor status Rich / R O2 sensor status Lean
L open/closed Loop CLOSED / R open/closed Loop OPEN
Does these readings mean that i have a dead Oxygen sensor? and does runners have 2 or just 1 like other vehicles?
Note that the mechanic moved the angle of the ignition distributor just a nudge and finally my runner is accelerating when i push on the throttle.

timothy47129

Your live data looks like your sensor is dead or disconnected but then again if you only have 1 sensor it would show 0 voltage since you dont have another one. As for how many i dont know i have a carbed 4 cylinder.I dont know what voltage toyota o2 sensors run at but usally over 1 volt is running rich

scope103

Your friend's scanner just isn't reading the data stream correctly. (Don't be shocked; OBD1 is not exactly standardized, and the fact he can read anything at all is pretty good.)

Unless your truck came from California, it only has one O2 Sensor (and in California it's upstream/downstream, not left/right). So the scanner is displaying "Right" but has no data for it.

So whatever problem you're having (are you having a problem?), it's not because of your non-existant "right O2 sensor."

walidcheb

Yes probably you right, i should re-check it with a specialist, think he could diagnose it better.
Thanks.

walidcheb

[QUOTE=scope103;52013007]Your friend's scanner just isn't reading the data stream correctly. (Don't be shocked; OBD1 is not exactly standardized, and the fact he can read anything at all is pretty good.)

Unless your truck came from California, it only has one O2 Sensor (and in California it's upstream/downstream, not left/right). So the scanner is displaying "Right" but has no data for it.

So whatever problem you're having (are you having a problem?), it's not because of your non-existant "right O2 sensor."[/QUOTE

Honestly my friend, i don't know if i have a problem or not, i read everywhere that the runners are slow, but i really think that a 6 cylinder 3L engine should deliver more and mine isn't, so that's why i took it for a scan.
Note that i bought it second hand and dunno where it came from, i live in Lebanon and was told it came from Europe.

bluewavecaptain

If you do a search on this forum and others, you will find that the 3vze gets tired after awhile. There are ways to breath new life into them. First thing I would do would be a tune up. Check to make sure your distributor is timed right; mine was way off when I got my truck. Other things include eliminating the crossover exhaust and installing headers, replacing fuel injectors, and aftermarket air intakes.

walidcheb

Well my friend, that's what i just did today, i calibrated the distributor and it is performing better.