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Old 06-17-2009, 09:02 PM   #1
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rich o2 sensor code
getting a rich o2 code. what could be causing it?
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Old 06-18-2009, 09:28 PM   #2
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Re: rich o2 sensor code
Bad O2 sensor, stuck injector, excessive fuel pressure, crapped out (or crapping) maf...
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3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, early '769' heads with 3500 valves, LS6 springs & mild porting, worked over heddman headers, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle. 210hp at 5800ft (that's 270hp at sealevel )
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Old 06-19-2009, 01:27 PM   #3
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Re: rich o2 sensor code
time to unplug the maf and see if the car runs better...
guess ill have to check the injectors also.
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Old 06-20-2009, 11:28 PM   #4
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Re: rich o2 sensor code
Unplugging the maf won't tell you anything. It reverts to 'limp home' mode which makes it run extra rich. Use a mechanic's stethiscope to listen to the injectors.
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Increasingly I find the difference between a 'fact' and opinion is the number of people that believe it.

3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, early '769' heads with 3500 valves, LS6 springs & mild porting, worked over heddman headers, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle. 210hp at 5800ft (that's 270hp at sealevel )
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Old 06-20-2009, 11:28 PM
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