9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHintake valve cleaner
Leading reported evidence
Replace injectors
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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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
Scoped at about 105k when I replaced the injectors.
Leading evidence: 'Replace injectors' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check before posting' (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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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
I run a can through them every year and there is a noticeable change in how they run, even though they are port injected as well.
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Performed · outcome unconfirmed
I've used the gas additive with good results, never used the spray intake stuff.
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
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Performed · outcome unconfirmed
I have used Sea Foam on my Subarus to great effect.
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Discussions that contain suggestions
1
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Suggestion · Original poster
Some research informs me that the 996 is not DFI, something I should've checked before posting.
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.
9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 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: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'm considering using either Seafoam or CRC GDI on my '03 C2 with 60K miles.
If folks here have used an intake valve cleaner product, please let me know your results, and what product you would suggest. Additionally, I've heard these products can damage the catalytic converter. Any truth to that?
Thanks.
I haven't used any. Sorry I can't recommend any.
Why do you need an in intake valve cleaner?
Since our cars are port fuel injection, the injected fuel keeps the intake injectors pretty clean.
This is one of mine at 105k miles.
That said, I'm on the edge of my ignorance, so maybe I should be doing something else.
You are correct, sir. Some research informs me that the 996 is not DFI, something I should've checked before posting.
That being said - is there any reason to use something like Seafoam or CRC in our cars? I read a claim in another thread that valve train noise was reduced after such a treatment.
No good effects, or no bad effects?
I have used Sea Foam on my Subarus to great effect. I run a can through them every year and there is a noticeable change in how they run, even though they are port injected as well.
There are two forms of sea foam -- one is a fuel additive that you pour into the gas tank before filling up. The other form is the spray Sea Foam that is sprayed into the intake while the engine is running. I've used the gas additive with good results, never used the spray intake stuff.
For the benefit of discussion, it's helpful if posters can clarify whether they are talking about the gas additive or the spray Sea Foam.
Jdbornem, your intakes look pretty clean. How many miles?
interesting to see your valves as i just scoped mine last week. 100k on the engine. Cylinder #2
