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Owns A Torsen
Joined: Mon Sep 18th, 2017
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If it is generally running fine and doesn't have any misses or loss of power it might be worth grabbing an upstream O2 sensor. I know they are not easy to get to and require a socket but at 204K there has to be a lot of crud on the O sensor depending on how you normally drive. If you take short trips and never give it much throttle then I bet it is just crudded up.
Of course this is based on what you have already replaced.
Bad thing about the O sensor if it is reading lean.... the bank might be running very rich because the system is trying to make up for what it thinks is a lack of fuel. Your mileage would suffer.
Someone really good with a scanner (better yet Forscan) could look at the short term fuel trims and get some clues.
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00 XLT 4WD RCSB 3.GO! Jalapeño
01 XLT 2WD RC Steppie 3.0 auto Silver
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