Wow answers to questions, So I'll try another question.
88 Pathfinder V6 4x4 is running rich with fuel residue in the air filter and poor performance?
Usually, when you have liquid residue in the air cleaner, it's due to a breather filter that failed, or a PCV valve that failed. Other than that, are there other symptoms that indicate a rich mixture? Poor fuel economy, low power, etc.?
Usually, when you have liquid residue in the air cleaner, it's due to a breather filter that failed, or a PCV valve that failed. Other than that, are there other symptoms that indicate a rich mixture? Poor fuel economy, low power, etc.?
Yes all of the above. The O2 sensor wires were burned on the exhaust and we taped them up plus changed the plugs. It ran better for a week. I'll change the PVC valve. What are you calling the breather filter?
Yes all of the above. The O2 sensor wires were burned on the exhaust and we taped them up plus changed the plugs. It ran better for a week. I'll change the PVC valve. What are you calling the breather filter?
There's usually a small rubber line that connects the air cleaner to the valve cover. Usually, as the PCV valve allows blowby to exit the crank case, some fresh air needs to be pulled in to replace it, and there's a small simple filter in the air cleaner where the rubber line connects to it (or the filter could be at the valve cover, depends on application). My breather filter was soaked with oil when I first got the truck. I replaced the filter, but it soon got soaked again. After a few months of living with it, I replaced the PCV valve, and the problem went away (even though the old valve rattled when I shook it).
The O2 sensor wiring "fix" sounds suspect. If the portion of the wire that got burned was on the sensor side of the connector, I'd replace the sensor (because you'll get a new wiring pigtail too). If the burn was on the vehicle side of the connector, I'd inspect the splice job very carefully. Your ECU may not be getting a clean signal from the O2 sensor.
I agree with Jadcock. The o2 sensor generates a small amount of voltage based on oxygen in the exhaust. This signal is so small it can be overcome by voltage induced from another wire, resistance, or poor insulation. They used to use a coax style sheath to prevent this, but later went to careful placement of the wire.
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Aaron Ford
95 2WD Nissan PU E
2002 Oldsmobile Intrigue GX
"The hard part about playing chicken is knowing when to flinch" Scott Glenn in The Hunt for Red October
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