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Old 10-18-2009, 08:01 PM   #26
Dave G
Scooby Newbie
 
Member#: 4738
Join Date: Mar 2001
Chapter/Region: Tri-State
Location: Philadelphia PA
Vehicle:
2006 Baja Turbo
Blue

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Quote:
Originally Posted by shipjumper View Post
yeah. my mileage is sucking..
maybe the o2 is the way to look...

UPDATE:

I've gone several thousand miles since the O2 sensor change.
I'm getting 19mpg city, and 24mpg hwy mileage.
That city mileage is with lots of stop-n-go driving, and the hwy driving is speeds between 30mph and 80mph with the air conditioning on for half of each hwy run.
That mileage is much better than I was getting before, and the engine is running much smoother, so I have to conclude that the O2 sensor replacement was proper.
Because I got good mileage during the first 10K miles, but the mileage went down after that (and I had complained to the dealer about a loss of power, but they found nothing wrong), I wonder if the O2 sensor was slowly going bad and then eventually crapped out altogether.
When the car runs this good, it really makes me love this car.
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Old 10-19-2009, 07:45 PM   #27
steven765
Scooby Specialist
 
Member#: 105920
Join Date: Jan 2006
Location: Somewhere in the Northeast
Vehicle:
2006 Baja 5 Speed

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likewise here on the O2 sensors needing replaced.

The surging makes sense really. O2 is used to determine mixture. If that start going erratic before it fails. ECU will start messing with fuel.

It might also be worth checking your TSP sensor and the IAT controller. I had these give me problems on my old GM causes all sorts of fun! NOT.
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