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YOUR RESEARCHHow much rent should I charge?
Reported or suspected cause
damage
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Discussions that report identifying a cause
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Reported cause
In the case of a Turbo it was the damage to the harness and the resulting odd behavior of the engine coupled with a CEL (I do not know the codes) that prompted the owner to bring the car in.
Leading evidence: 'damage' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'damage' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check engiine light' (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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Performed · outcome unconfirmed · Original poster
Macster: I cleaned my filter this summer (about 4k ago) with the K&N cleaning/oiling kit - whatever it's called.
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Performed · outcome unconfirmed
Found a mouse nest on top of my engine when I replaced the starter last week.
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Suspected cause
That's probably the source of your engine's idle troubles...
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Suspected cause · Original poster
They are probably the two brands I would have chosen myself.
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Suggestion
The general consensus seems to be that this is pointless if there are no other modifications to the engine to allow it to make any use of this air, but a lot of people will concede that it might be useful if you've also modified your exhaust and remapped your ECU.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
damage
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that report identifying a cause
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.
Reported cause
In the case of a Turbo it was the damage to the harness and the resulting odd behavior of the engine coupled with a CEL (I do not know the codes) that prompted the owner to bring the car in.
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.
19 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T213932Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'd love to give him hydro. Where do I attach the jumper cables? Oh, wait. I know.
The squirrel is not the source of the idle roughness. I've definitely had the idle problem longer than the squirrel nest. I could have damage from a different squirrel, though.
Macster; are you serious about the aftermarket intake? It's Evolution. Or is the filter not an Evo? It was on the car when I got it.
Found a mouse nest on top of my engine when I replaced the starter last week. Do mice get a discount because they're smaller or do I charge more because they come in multiples?
Aftermarket air filters based on what I read account for more than their fair share of problems.
Sure there are those that swear by them and that's fine. But most end up swearing at them.
In the picture you posted the rubber seal looks suspect which if it is could let hot engine compartment air into the intake which is not a CAI but a HAI system.
Additionally air entering this air box via this path may upset the air flow past the MAF which can cause problems. It is important all air enter the air box through the correct path and its flow smooth out before it passes through the MAF.
The stock air intake system brings in cold air, as cold as it can be and the filter removes the dust.
The aftermarket filters have a more open construction and rely upon oil to trap dust particles as they navigate the path through the filter element and encounter the oiled fibers of the filter and adhere to the oil.
The effectiveness this depends upon the quality of the oiling.
Not many owners are good at this or fail to realize how critical it is and just slather the oil on thinking if some's good more's better or having heard/read about overoiling under oil the filter to avoid having the excess oil possibly foul the MAF.
You can leave the filter alone for now, though I note the filter element looks to be a bit grey which suggests it is dirty or possibly under oiled.
The attention needs to be on inspecting for any damage to the wiring or hoses/vent lines the creature in the car might have done. Squirrels I have no (2nd hand) experience with but I've seen several cars in Porsche dealer service bays that have been a home to mice or rats and the damage can be substantial.
In the case of a Turbo it was the damage to the harness and the resulting odd behavior of the engine coupled with a CEL (I do not know the codes) that prompted the owner to bring the car in. The engine had to come out and the engine wiring harness among other things replaced.
In the case of a Cayman mice not only chewed bare patches in the carpet, but also chewed holes in the molded rubber that helps seal/direct air flow into the radiator ducts and also chewed a hole in a gasoline vent line from between the gas tank and engine compartment. It was this hole that triggered a CEL that led to the finding the car had mice in it.
If you do not find any damage from the squirrel then you need to look elsewhere for the cause of the engine's behavior.
Sincerely,
Macster.
The EVO filter housing seals at least as airtight as the stock item.
The value of this kind of mod is debated on car enthusiast boards with the same vigor as fuel octane and nitrogen in tires and, like those issues, the debate is powered by a lack of hard evidence either way. I've never seen anyone convinced away from their ingoing bias. The folklore around CAIs is even worse, because there actually
are
cheap, stupidly designed ones out there decorating the engine compartments of slammed Hondas and 5 liter Mustangs. The EVO doesn't deserve to be painted with that brush, whatever your opinion of CAIs in general.
What I can tell you is that the mod is not intended to make the intake charge any colder than the stock airbox, it's designed to bring more volume and/or do it with 'better' flow characteristics (like velocity or pressure or whatever). The general consensus seems to be that this is pointless if there are no other modifications to the engine to allow it to make any use of this air, but a lot of people will concede that it might be useful if you've also modified your exhaust and remapped your ECU. Again, nobody ever has enough proof to win the day. I've even seen people's dyno charts dismissed as inconclusive.
It's worth remembering this, though: no car company designs its airbox (or anything else) with only power in mind. They have to contend with a matrix of noise laws, emissions rules, the cost of building the part and the efficiency with which the car can be serviced. The aftermarket doesn't have those worries. If you have the EVO, I don't personally think you have anything to worry about as long as it's properly maintained. Mine has not been a problem.
Aha. You've uncovered the latest in IMS warning technology. Squirrels are extremely sensitive to subtle changes in frequencies undetectable by humans and will automatically gnaw through power lines to shut the engine down if failure is eminent. A little known factoid.
Macster: I cleaned my filter this summer (about 4k ago) with the K&N cleaning/oiling kit - whatever it's called. IIRC, K&N warns of cleaning too often and that their filters get better as they get dirty, to a point.
Now, is it under oiled? Perhaps. I followed the instructions. How else could I determine 'proper oiling'? Should I clean it and try oiling again next season, despite the theory that dirtier is better?
BruceP: I totally agree with your view. When I purchased the car, it had the Evo intake and Fabspeed exhaust I was glad to have both as I don't see the point in only increasing flow on one side of the equation. I would have found it hard to justify dropping the extra cash on these two after buying the car, but I was quite happy to get them included. They are probably the two brands I would have chosen myself.
So, I vacuumed out the grass last night. Can anyone save me some time and tell me what the blue wire is for? (this pic below is immediately in front of the passenger tail light, beside the air intake)
Again, I don't think the squirrel is related to the idle problem, but it could be a variable. See my rough idle thread for the latest development.
