- posted
19 years ago
86 300zx stalls when warmed up
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- posted
19 years ago
Ignore the ecu codes on that car, they are worthless information. At that point they didn't have the fault checked together at all.
First thing I'd look at is the AIV valve and make sure it isn't dumping exhaust gas through the MAS/AF meter whatever you want to call it. Sounds like this may have happened and ruined the MAS.
Another thing I've seen on high milage cars is the engine is using some oil and giving a bad signal to the O2 sensor. It see's the oil as fuel and leans out the engine. Try running it with the O2 sensor unplugged and see how it reacts.
Same with the coolant temp sensor, there is a subharness connector on the pass side of the plenum and the computer does into a default countdown timer setting for the temp when it's unplugged and run. if that helps replace the sensor AND the subharness. It's a mother to get to and requires a funky special tool to remove without taking the front of the engine apart.
Hope this helps you get in the right direction.
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- posted
19 years ago
^^^Another thing I've seen on high milage cars is the engine is using some oil and giving a bad signal to the O2 sensor. It see's the oil as fuel and leans out the engine. Try running it with the O2 sensor unplugged and see how it reacts.
***Tried this and it was the same. I burn about 1 qt 10w-30w Mobil1 every 1500 miles. Thanks for the other great >- Vote on answer
- posted
19 years ago
Yea that's not "using oil" in my book. Good luck and let us know what you find.