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Old 11-14-2008, 05:51 PM   #1
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What codes are being presented?
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Old 11-14-2008, 10:22 PM   #2
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What codes are being presented?
It's reporting P1128 and P1130.
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Old 11-15-2008, 04:24 AM   #3
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I believe those codes are for the pre-cat O2 sensors on both sides of the car. Usually both O2 sensors won't go bad at the same time. I've heard this could indicate a MAF sensor problem, but I'd search through some archives to confirm that.
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Old 11-15-2008, 08:15 AM   #4
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Your car is running lean. Most often from an intake vacuum leak, bad AOS, or bad MAF.
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Old 11-15-2008, 02:44 PM   #5
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Can also be low fuel pressure or open evap canister purge valve.
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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Old 11-15-2008, 04:14 PM   #6
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Can also be low fuel pressure or open evap canister purge valve.
Excuse my ignorance, but what do I do to check if its these 2 things?

Thanks.
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Old 11-15-2008, 05:48 PM   #7
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What size MAF Housing are you running. The 2.7L and 3.4L MAF's are the same part but the inner diameter of the MAF Housing is different between the two.

The 3.4L has a 3.5" MAF Housing. Get a 996 Airbox lid, cut out the MAF housing and you should be good to go.

Last edited by VRsyncro; 11-15-2008 at 05:50 PM.
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Old 11-16-2008, 08:09 AM   #8
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Quote:
Originally Posted by victoreric
Excuse my ignorance, but what do I do to check if its these 2 things?

Thanks.
PM sent.............
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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Old 11-15-2008, 04:12 PM   #9
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Quote:
Originally Posted by Topless
Your car is running lean. Most often from an intake vacuum leak, bad AOS, or bad MAF.
I've checked for intake leak and we're suspecting the MAF right now. What does AOS stand for?

Does anyone know if I need to use the 996 MAF if I did the swap? I'm using the old one from my boxster right now.
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