Quote:
Originally Posted by wooo
Yeah, no obd2. The led code is "bad lambda" the blink code is "o2s, fuel mix lean or rich". I assume rich based on mpg drop and smell from exhaust.
I'm not 100% sure which vacuum hose is fuel pressure regulator, can post a picture later of the one I think it is, but it was bone dry. Car runs and starts really smooth so the o2s being out and mix being constantly rich makes sense.
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Look for the fuel injector rail ( chrome tube running front to back ) at the very front, there will be a chrome can about 1 1/4" dia with a single vacuume hose attached to one side, pull the black hose and have a look.
Quote:
Originally Posted by wooo
Question, can I test the voltage change on o2s without having it connected under the passenger seat? I've seen people say both connected and unconnected and want to make sure it doesn't matter to the voltage readings.
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If you check O2 voltage with wiring connected, you will see the 0.500 volt bias from the engine computer. If you disconnect it, you can measure actual O2 voltage and the computer will remain in open loop. This is where the computer runs in a neutral mixture range.
If your coolant temperature sensor for the engine computer has failed open, the computer thinks the motor is cold and is applying a rich mixture.
Quote:
Originally Posted by wooo
Any way to easily check if the catalytic converter is bad too? (I hear that can cause o2s to fail, etc.)
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If the engine is running rich for a long period of time the car will clog , in extreme cases it will melt.
Quote:
Originally Posted by wooo
Will retest today and put in a new o2s today if it fails, just scared of what else this might need done to pass emissions!
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95 is on the the tail end of "bio degradable" insulation wiring , have a close look at exposed wires and lightly rub them, if the insulation falls off, you will need to replace the harness before any other work is done. Short term you might be able to cut the shrink wrap and tape up wires.