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Compression readings from OBDII port?

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YOUR RESEARCHCompression readings from OBDII port?

Leading reported evidence

Test computer/system one can disable spark and fuel injection

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Suggestion
With the proper equipment/test computer/system one can disable spark and fuel injection to each cylinder while engine running and by noting the drop in RPMs determine which cylinder is weak, the weaker cylinder affecting engine RPMs the less because it is contributing less effort.
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Compression readings from OBDII port?

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Leading evidence: 'Test computer/system one can disable spark and fuel injection' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test computer/system one can disable spark and fuel injection' (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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Test computer/system one can disable spark and fuel injection

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
With the proper equipment/test computer/system one can disable spark and fuel injection to each cylinder while engine running and by noting the drop in RPMs determine which cylinder is weak, the weaker cylinder affecting engine RPMs the less because it is contributing less effort.
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Compression readings from OBDII port?

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

Rennlist: 1 discussions

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Generation: 20261026T225432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I heard at one time that the 996 MkII would give engine compression readings for each cylinder with the Porsche OBDII reader. Is this true? AA

POST 2Original post

Quotes source post: 4982451

in the cylinders. With the proper equipment/test computer/system one can disable spark and fuel injection to each cylinder while engine running and by noting the drop in RPMs determine which cylinder is weak, the weaker cylinder affecting engine RPMs the less because it is contributing less effort. Sincerely, Macster.

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