i was about to correct you on there but i am taking my information assuming the 5m is powered by a tccs ecu. which doesn't turn on a check engine light even if the o2 sensor is missing and won't cause a rough idle /running condition. might lose some hp but it's like 1hp-2hp.trdmkii said:i need to change mine, i know its going south, well also i have an injector leaking causing a rich condition sometimes...hard starts...blah..i'm not about to rip all that shit apart....but i would suggest that if you want to try to improve your gas milage that you replace it since your at 150k....it couldn't hurt....when they go bad all together they can cause your check engine light to come on and a rough running condition
imo, yes and from 9 posts earlier in the threadSo if you have an Air/Fuel Ratio gauge hooked up and it just stops reading altogether, the O2 sensor has most likely failed? I'm curious because my Autometer A/F gauge has suddenly stopped working and now my car has a weird idle when coming to a stop. Any other info on this?
easy enuff to find out and fix.
from 86 tsrm p. FI-62 do "check idle speed" with an analog voltmeter.
it really checks whether ox sensor is working. if bad then see pps.
FI-73 and 74 to diagnose.