6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHVery High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Check throttle cable
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've checked the throttle cable to make sure that it isn't hung up on anything (it isn't) and I unplugged the battery to reset to DME (just in case).
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work
Check presence of vacuum (there was)
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
After using Durametric to activate the air injection pump (and confirmed that it is, in fact, working), I started the engine and disconnected the vacuum line connecting to the air change over valve to check for the presence of vacuum (there was).
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Check throttle cable' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check presence of vacuum (there was)' (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.
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
After using Durametric to activate the air injection pump (and confirmed that it is, in fact, working), I started the engine and disconnected the vacuum line connecting to the air change over valve to check for the presence of vacuum (there was).
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check presence of vacuum (there was)
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
After using Durametric to activate the air injection pump (and confirmed that it is, in fact, working), I started the engine and disconnected the vacuum line connecting to the air change over valve to check for the presence of vacuum (there was).
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check throttle cable and it appears
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 went down to the garage to double check the throttle cable and it appears to me that the cable is seated correctly.
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check throttle cable right behind the drivers side rear tire
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
Check the throttle cable right behind the drivers side rear tire.
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (10)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check presence of vacuum (there was)
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
After using Durametric to activate the air injection pump (and confirmed that it is, in fact, working), I started the engine and disconnected the vacuum line connecting to the air change over valve to check for the presence of vacuum (there was).
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect vacuum line connecting
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
After using Durametric to activate the air injection pump (and confirmed that it is, in fact, working), I started the engine and disconnected the vacuum line connecting to the air change over valve to check for the presence of vacuum (there was).
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace vacuum tube
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 am convinced that it must be some sort of vacuum problem now, but I can't imagine what me removing and replacing the vacuum tube to the change over valve would have changed!
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use durametric
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
After using Durametric to activate the air injection pump (and confirmed that it is, in fact, working), I started the engine and disconnected the vacuum line connecting to the air change over valve to check for the presence of vacuum (there was).
Very High Idle! 2100rpm - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Replaced it once clean and the idle speed is back to normal.
Hey Guys,
I really need your help on this one....sadly, this is my first post (not the first post I wanted!
). I spent about an hour searching through the various Boxster forums but couldn't find anything similar to the problem I'm having.
I have a 1998 Boxster w/ ~137,000 miles. Manual Transmission.
I spent a few hours today replacing my trans/diff oil and then diagnosing the intermittent P0410/P1411 CEL that I've had since purchasing the car. In diagnosing the CEL, I followed the steps that Loren posted about diagnosing Secondary Air Injection problems. After using Durametric to activate the air injection pump (and confirmed that it is, in fact, working), I started the engine and disconnected the vacuum line connecting to the air change over valve to check for the presence of vacuum (there was). In starting the engine to check for vacuum, the engine idle inexplicably went to 2100rpm (not fluctuating). Even after reconnecting the vacuum line to the change over valve, the idle remains at 2100rpm. I've checked the throttle cable to make sure that it isn't hung up on anything (it isn't) and I unplugged the battery to reset to DME (just in case). Even after restarting the car 4 times now, the idle issue remains. When I was activating the air pump using Durametric, I accidentally clicked on "Start" for IACV and then clicked on "Stop" even though no noise was made. Could that have been part of the problem? I'm at a loss!
Any help would be much appreciated!
Chris
This is a long shot but it has happened to me. Check the throttle cable right behind the drivers side rear tire. There is a little black box where it connects and it can get knocked out of alignment while working on the car. The cable may not be seated correctly in there. That has been my source of this issue once or twice. Please update us on what the outcome is.
Thanks for the quick response JAAY. I went down to the garage to double check the throttle cable and it appears to me that the cable is seated correctly. I am convinced that it must be some sort of vacuum problem now, but I can't imagine what me removing and replacing the vacuum tube to the change over valve would have changed!
... more air is coming through the throttle body.
You either have an air leak in one of the rubber connectors or the idle control valve is dirty and stuck open.
Happy Boxstering
Pedro
Thanks Pedro! You were spot-on. I removed the idle air control valve and it was caked with carbon build-up. Replaced it once clean and the idle speed is back to normal.
