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Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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

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YOUR RESEARCHWeird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Replace coil and plug, nothing

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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

Changed coil and plug, nothing.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work

Check per say

No successful repair reported for this finding.

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1
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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

Not a leak down check per say but i think it would be similar in nature.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary

Leading evidence: 'Replace coil and plug, nothing' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check per say' (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 · 4 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Use tire

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 a tire fill rigged to the same hose of the compression tester.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check per say

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

Not a leak down check per say but i think it would be similar in nature.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Fill gauge goes up

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

The tire fill gauge goes up to 100 psi and no air escapes out the exhaust or through the intake.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Fill rigged

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 used a tire fill rigged to the same hose of the compression tester.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (7)

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

Check per say

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

Not a leak down check per say but i think it would be similar in nature.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Fill gauge goes up

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

The tire fill gauge goes up to 100 psi and no air escapes out the exhaust or through the intake.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Fill rigged

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 used a tire fill rigged to the same hose of the compression tester.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace coil and plug, nothing

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

Changed coil and plug, nothing.

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use leakdown tester

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

Are you using a leakdown tester?

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use tapatalk

No successful repair reported for this finding.

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Reported fixes
0
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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

Sent from my SM-G970U using Tapatalk

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Suggestion

Sent from my SM-G970U using Tapatalk

Original post Read captured discussion
Weird compression test results 2000 986 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use tire

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 a tire fill rigged to the same hose of the compression tester.

Original post Read captured discussion
Weird compression test results 2000 986 S - 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.

4 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.

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

Generation: 20261027T165639Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Can’t make out what it could be, The needle on the gauge does not move when cranking but when you push air into the cylinder, it holds pressure and you can’t hear it leak out of the exhaust or throttle body. Took the oil cap off, no noise anywhere. Cyl #1 misfire on obd II. Changed coil and plug, nothing. Engine shakes badly, very down on power, raw fuel smell from exhaust. Quit working under light load at 2000 rpm, just cruising. I’m lost, any ideas???

POST 2Original post

Quotes source post: 592454

How are you pushing air into the cylinder? Are you using a leakdown tester? If yes, does the needle move THEN? Sent from my SM-G970U using Tapatalk

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 592456

I used a tire fill rigged to the same hose of the compression tester. The tire fill gauge goes up to 100 psi and no air escapes out the exhaust or through the intake. Not a leak down check per say but i think it would be similar in nature. Ready to call it dead, unless someone can help me figure it out.

POST 4Original post

I've seen this once before, on a pushrod V8. I don't know why it wouldn't be plausible here as well. That motor had a broken valve spring, so when the motor was cranked, no compression. When air was introduced at 100psi, it was enough to slap the valve up into place and hold it there. I surmised then that this is one reason why a leakdown tester has a valve that allows one to introduce air more gradually. If I were you, I'd get a borescope in there and have a look around. Sent from my SM-G970U using Tapatalk

This is a source reference. Confirm exact model applicability in the original material.