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Old 07-16-2014, 04:45 PM   #1
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Should I be worried?

Just got the boxster a few weeks ago, in excellent condition, but I guess the engine was never cleaned, this oily residue has me wondering if I have a AOS situation going on, my cel light was on and I just changed my MAF sensor.

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Old 07-16-2014, 05:59 PM   #2
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Since you dont have any driveability problems, thats good. Pull the codes and post.

I would try removing the Rubber ducts that are oily and check for cracks or rips and leaks. When you put them back on, make sure they seal,properly.
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Old 07-16-2014, 06:05 PM   #3
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Codes were 1128 and 1130, I cleaned the Maf sensor and the cel returned the next day, so I decided to put in a new sensor, I'll know by tomorrow if the problem is solved,
But yes I plan on cleaning the entire engine and checking for leaks as well.
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Old 07-17-2014, 04:13 AM   #4
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The conventional wisdom is that 1128 and 1130 are symptoms of a vacuum leak. I was getting the codes almost weekly over the winter, and I checked all of the usual suspects: vacuum lines on the engine, as well as the AOS tube and the oil filler tube. No luck. I finally realized that the codes occurred within a day after refueling. I replaced the gas cap in April, and have had no codes since.

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Old 07-17-2014, 07:16 AM   #5
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+1 on vacuum leak. If you are a DIY owner, this might be an opportunity to do a Throttle body/Plenum tube clean.
This would also let you examine closer for any damaged items that could cause a leak

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