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Pelican Parts

2007 997S System too lean at idle bank 1&2

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Original source
6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH2007 997S System too lean at idle bank 1&2

Reported or suspected cause

maf combined

Reported cause

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that report identifying a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported cause · Original poster

After smoking it and checking short term and long term fuel trims and a few other things it turned out to be a bad MAF combined with the failing AOS.

2007 997S System too lean at idle bank 1&2
Frequently discussed work

Clean maf and see what happens

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Still have to clean the MAF and see what happens after she's all back together.

2007 997S System too lean at idle bank 1&2
Read full discussion summary

Leading evidence: 'maf combined' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'maf combined' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean maf and see what happens' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 6 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Use schwaben scan tool

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I used my Schwaben scan tool to troubleshoot.

2007 997S System too lean at idle bank 1&2

cracked hose

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause

You have a small vacuum leak and it is probably an old cracked hose.

2007 997S System too lean at idle bank 1&2

Clean maf and see what happens

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Still have to clean the MAF and see what happens after she's all back together.

2007 997S System too lean at idle bank 1&2

Replace air oil separator

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I did notice that there was considerable oil in my plenum so broke it further down to change the AOS.

2007 997S System too lean at idle bank 1&2
Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Clean maf and see what happens

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Still have to clean the MAF and see what happens after she's all back together.

2007 997S System too lean at idle bank 1&2

Replace air oil separator

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I did notice that there was considerable oil in my plenum so broke it further down to change the AOS.

2007 997S System too lean at idle bank 1&2

Use schwaben scan tool

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I used my Schwaben scan tool to troubleshoot.

2007 997S System too lean at idle bank 1&2
Reported and suspected causes (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

maf combined

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that report identifying a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported cause · Original poster

After smoking it and checking short term and long term fuel trims and a few other things it turned out to be a bad MAF combined with the failing AOS.

2007 997S System too lean at idle bank 1&2

cracked hose

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause

You have a small vacuum leak and it is probably an old cracked hose.

2007 997S System too lean at idle bank 1&2
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Pelican Parts: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T152433Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

About a week ago I got a CEL along with a bit of rough running. Also on occasion a bit of stumble on acceleration. I used my Schwaben scan tool to troubleshoot. I have two codes. P2188 System too lean at idle bank 1 P2190 System too lean at idle bank 2 Anyone here have any experience with this situation? A generic search on the web lists a plethora of things that could be a cause. I'm hesitant to start shotgun replacing parts. Oh, there is also a bit of oil smell in the engine bay. not like oil on hot pipes but rather like if the oil cap was left off. More of an internal hot oil smell.

POST 2Original post

You are going to need that shotgun: You have a vacuum leak, which could be anywhere in the intake system.

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 10727586

Thanks! I'm gonna smoke it tomorrow and look at the intake system. Hopefully I don't have to pump too many rounds into it LOL!

POST 4Original post

Smoke it. This is one of the harder one to troubleshoot. You have a small vacuum leak and it is probably an old cracked hose.

POST 5 / ORIGINAL POSTEROriginal post

Ok, got around to smoking it yesterday and no leaks. I did notice that there was considerable oil in my plenum so broke it further down to change the AOS. I'm on parts hold as a few of the lines were quite brittle and broke on disassembly. Still have to clean the MAF and see what happens after she's all back together.

POST 6 / ORIGINAL POSTEROriginal post

Just a quick update on this ordeal. After smoking it and checking short term and long term fuel trims and a few other things it turned out to be a bad MAF combined with the failing AOS. I replaced both of these items as well as a fresh round of spark plugs and all is good. Car runs great again. One of the symptoms on top of the codes was it started shifting really bad (Tiptronic). It was also hesitant on acceleration. Never gave me any specific MAF codes just the lean at idle. Oh well! Job done.

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