24 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHQuestion on Air Intake
Leading reported evidence
Clean throttle body
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
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
The last time I looked at it was when I cleaned the throttle body, it was fine, no warping or anything.
Leading evidence: 'Clean throttle body' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Adjust angle/speed' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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
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
Couple downsides I noticed immediately though were that it wobbled some at startup and idle until it settled in (first start after I put it in, guess that's not too crazy) and it ran very rich.
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 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
Helmholtz principle for dummies: think of when you blow air over the top of an open bottle and can adjust the angle/speed to get a different whistle.
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 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
I noticed this ad on ebay for an after market air intake that replaces the factory intake...
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 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
So I'm not happy running the engine that rich, so out it goes unless some of you who have had it can say that yes, it runs rich, but the ECU figures it out and reins it in after a few days.
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
So I'm not happy running the engine that rich, so out it goes unless some of you who have had it can say that yes, it runs rich, but the ECU figures it out and reins it in after a few days.
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
Couple downsides I noticed immediately though were that it wobbled some at startup and idle until it settled in (first start after I put it in, guess that's not too crazy) and it ran very rich.
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.
24 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: 20261027T165639Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I noticed this ad on ebay for an after market air intake that replaces the factory intake... sort of. They must ship you that little orange cap you see in the photo below to cover up a secondary bypass to the intake of some sort. Question for those that know; 1. What does the small tube that connects to the factory intake do and will capping it off affect anything? I don't want to throw a CEL because of this. 2. What is the thinking around here on this mod? Worth the $100? Does it do anything without a cone filter attached and the factory box removed? There are so many claims about extra HP for mod's like these that I doubt the factory would have missed out getting a few HP if putting in a simple tube like this would have worked. But you never know.
looks like a fabspeed kit. anyway, the cap, iirc, blocks off the resonator chamber, or somesuch. anyway, it's supposed to create a harmonic at certain revs to make your exhaust/engine note louder.
it should NOT throw a CEL. no HP gains that anyone can really prove, but it sounds better. i did a similar mod myself prior to mk 1 muffler mod. with both together my car sounds 30% better than stock imho.
LINKY
I did this mod form a "hack" standpoint for under $3 - its been named the "Gillette Mod" and all you need is the cap off a can of Gillette shaving cream (which cost $3, and if you use it, you are not out anything) and pop that cap under the hose (takes 5 minutes)
If you dont like it, take it out, if you do.... run it. Mine has been in for about a year.... NO CEL or other issues.
but its not CHEVY ORANGE ! hahaha
a filter will add better sound (I am told) but you have to choose wisely (Evoms seems to be a good choice from other comments - avoid K&N, most agree)
IMHO not worth the $100. Go out to dinner instead
I think ivangene summed it up pretty well on how you can replicate it cheaper.
Regarding that orange cap. The idea is that you remove the Helmholtz resonator which the factory put there to acoustically "tune" the sound on the intake.
Helmholtz principle for dummies: think of when you blow air over the top of an open bottle and can adjust the angle/speed to get a different whistle. So removing it makes your intake sound a little louder at low rpm (which the factory was trying to tune out because they thought you wanted a quiet car without annoying intake drone at 2000-2500 rpm).
In summary more noise, no more HP
Thanks guy's - great info. Figured out the no HP gain as there really is no free lunch in life without paying somewhere down the line. An $89US mod for a better sound is less money then I've spent on other dumb stuff, so the wife won't flip out like the time I bought a MIG 25 fighter pilot helmet and O2 mask from the Ukraine. Should of heard the whining then...
If you search for "orange cap" you will find a bunch of info about this mod. If you find someone who has a spare orange cap (apparently Niagra Plastics won't send free samples anymore) or find a suitable substitute it a nice cheap/free mod. Just make sure what you use doesn't get sucked into the throttle body.
The closing off of the resonance makes the exhaust sound a little throatier and raspier at WOT. Not as good sounding as PSE or an aftermarket exhaust (what do expect for free?). Neither the cap nor the silicone tubing have any performance affect (bad or good) nor throw any CEL.
IMHO it's not worth more than $5.
I�ll bet you guys that the reservoir, where the orange cap is installed, is used to dampen pulsations of the air flow to help the MAF read more accurately. It may make a difference in sound but that is not its purpose. Just my opinion.
Also, take a look at "B" in the attachment.
Done - but not until this weekend. Darth Vader in white. No hooky Red Star which every fool paints on the front of them.
DE event conversation: "My helmet's gone Mach 2.3, what' your helmet gone"?
Then there's the time I came home with the Tristar L1011 1st class seats...
where is a porsche engineer when you need one? (to ask if there is a reason other than sound for resonator)
i guess we need a before and after dyno run??????
I saw this thread and looked around--Niagara still sends out free samples, the new model number is around on this forum (sorry I forgot it since last week) and it fits snugly enough that I couldn't jam it through the secondary intake plenum or into the air filter box, so there's no risk of it dumping the bone and hopping in the engine unless the thing melts.
For the results: Exhaust note is more pronounced, but more than that there's a distinct "I'm positively sucking as much air as I ever have" sound coming from the engine. Definitely cool. Couple downsides I noticed immediately though were that it wobbled some at startup and idle until it settled in (first start after I put it in, guess that's not too crazy) and it ran very rich. I had the windows down and backing into the road I could smell gas.
So I'm not happy running the engine that rich, so out it goes unless some of you who have had it can say that yes, it runs rich, but the ECU figures it out and reins it in after a few days.
I've had that orange cap on for coming to 3 years now. The last time I looked at it was when I cleaned the throttle body, it was fine, no warping or anything. And I haven't noticed any difference in startup idling, nor have I noticed any smell of gas.
When I first installed it, I could hear the sound difference. But after the MKII PSE-hack exhaust mod, the orange cap mod has become kinda redundant.
This is a source reference. Confirm exact model applicability in the original material.
