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08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCH08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Check compression all you need

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Suggestion
If you are just checking compression all you need to do is remove the plug & fuel pump fuse, crank it over for a set amount of time, then move on to the next cyl.
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08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Check compression all you need' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check compression all you need' (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.

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Set amount of time

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Suggestion
If you are just checking compression all you need to do is remove the plug & fuel pump fuse, crank it over for a set amount of time, then move on to the next cyl.
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08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test crank it

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Suggestion
When you crank the engine over for the test, crank it for a timed period for each cyl.
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08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test on my newly acquired 08 box

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Unsuccessful attempts: 1
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Suggestion · Original poster
Hi All, Going to do a compression test on my newly acquired 08 Box.
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08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (4)

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

Check compression all you need

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 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
If you are just checking compression all you need to do is remove the plug & fuel pump fuse, crank it over for a set amount of time, then move on to the next cyl.
Original post Read captured discussion
08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Set amount of time

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
If you are just checking compression all you need to do is remove the plug & fuel pump fuse, crank it over for a set amount of time, then move on to the next cyl.
Original post Read captured discussion
08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test crank it

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
When you crank the engine over for the test, crank it for a timed period for each cyl.
Original post Read captured discussion
08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test on my newly acquired 08 box

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
Hi All, Going to do a compression test on my newly acquired 08 Box.
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08 Boxster Compression Test - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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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.

5 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: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi All, Going to do a compression test on my newly acquired 08 Box. Just want to be sure of the procedure: Eng to operating temp Pull all coil packs and plugs Pull Fuel pump fuse Disable Ignitions Sys(not sure how) Attach Comp.gauge Throttle to the floor Crank 5 or so times Repeat for other cylinders then repeat with squirt of oil in each Just not sure how or why to disable ignition sys when all the coils are removed anyway. Can I just un plug the DME in the trunk to do this? Did it before can't remember. Thanks V

POST 2Original post

Quotes source post: 643181

When you crank the engine over for the test, crank it for a timed period for each cyl. Say 5 seconds each cyl. trying to count crank revolutions is very difficult. Also have a charger on the battery so you have as equal cranking power for each cyl. as possible. Equal cranking power and equal cranking time for each cyl. is important in how it relates to balance of power from one cyl. to the next. I don't have info on electrical layout of an 2008 so can't help with disabling ignition system. The rest of your planned procedure looks good.

POST 3 / ORIGINAL POSTEROriginal post

Thanks...Anyone want to chime in on disabling the ignition sys. Or just unplugging the DME will do it? Thanks V

POST 4Original post

Why do you need or want to? If you are just checking compression all you need to do is remove the plug & fuel pump fuse, crank it over for a set amount of time, then move on to the next cyl. Dont need to make it more complicated.

POST 5 / ORIGINAL POSTEROriginal post

Thats what I thought. Just wanted to be sure.

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