Planet-9

How to check whether ECU has been flashed?

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3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHHow to check whether ECU has been flashed?

Leading reported evidence

Use before, and do know know the owner either

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Performed · outcome unconfirmed
I bought my car used before, and do know know the owner either.
Original post Read captured discussion
How to check whether ECU has been flashed?

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Check whether the ecu has been flashed

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Suggestion
What's the best/easiest way to check whether the ECU has been flashed with an aftermarket file?
Original post Read captured discussion
How to check whether ECU has been flashed?

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Leading evidence: 'Use before, and do know know the owner either' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check whether the ecu has been flashed' (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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Check whether the ecu has been flashed

Suggestion or failed attempt

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Discussions that contain suggestions: 1

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Suggestion
What's the best/easiest way to check whether the ECU has been flashed with an aftermarket file?
Original post Read captured discussion
How to check whether ECU has been flashed?

Run could be a good one as last resort

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Suggestion
I suppose dyno run could be a good one as last resort ...
Original post Read captured discussion
How to check whether ECU has been flashed?

Use butt dyno

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Suggestion
It's a little hard to use the butt dyno to determine anything.
Original post Read captured discussion
How to check whether ECU has been flashed?

Frequently discussed actions (4)

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Check whether the ecu has been flashed

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
What's the best/easiest way to check whether the ECU has been flashed with an aftermarket file?
Original post Read captured discussion
How to check whether ECU has been flashed?

Run could be a good one as last resort

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
I suppose dyno run could be a good one as last resort ...
Original post Read captured discussion
How to check whether ECU has been flashed?

Use before, and do know know the owner either

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
I bought my car used before, and do know know the owner either.
Original post Read captured discussion
How to check whether ECU has been flashed?

Use butt dyno

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
It's a little hard to use the butt dyno to determine anything.
Original post Read captured discussion
How to check whether ECU has been flashed?

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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.

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

Planet-9: 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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

What's the best/easiest way to check whether the ECU has been flashed with an aftermarket file? I don't have a Durametic cable or any software to read the ECU. I bought my car used before, and do know know the owner either. So there is no way for me to ask. Thanks

POST 2Original post

I'd dyno the car to see if there was any hp bump over stock. Find a dyno shop that has done a car similar to yours for a comparison. But before that, check if the exhaust or any other potential performance mods were done by the previous owner since a tune will usually be done to get the most from the new parts.

POST 3Original post

Actually, the reason why I asked is because the car came with the smaller version of IPD Plenum + aftermarket intake. That what got me started hehe Unfortunately every car feels different to begin wit. On top of that, most of the 987.1 in my area are either not stock anymore, or are missing the 3rd pedal. It's a little hard to use the butt dyno to determine anything. I suppose dyno run could be a good one as last resort ...

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