20 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCEL & CAI
Leading reported evidence
Clean maf as good as i can
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
I picked up a can of MAF cleaner at autozone, disassembled the whole thing and cleaned the MAF as good as I can.
Leading evidence: 'Clean maf as good as i can' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'over oiled filter' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check voltage' (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 · Original poster
I had a K&N cold air intake installed 5 weeks ago on my 99 996 C2.
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
Cleaning my MAF bought me about 3 weeks before it threw a CEL, so I replaced with a new MAF and no more CELs, and that was 3 years ago.
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
used the can of maf cleaner and removed k&n for stock and no light for about a year.
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 suspect 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.
Suspected cause
Probably an over oiled filter that may have damaged your MAF.
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.
20 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 · 1 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
I had a K&N cold air intake installed 5 weeks ago on my 99 996 C2. Have been driving daily and took to Mosport for PCA DE's in September and last weekend. Don't know if any horsepower gain but sure sounds great when floored at 4000 rpm!
However, on Monday my CEL came on and hasn't gone off. My mechanic is away on holidays so the car is just sitting in the driveway looking dejected. Any words of wisdom?
Probably an over oiled filter that may have damaged your MAF. You can go to your local autoparts store to have them read the CEL. Your options are to try to clean the MAF with electronics cleaner or purchase a new MAF.
sorry -
but after that kit arrived....you opted to install it
pile of tin in a box and chop holes in the car so you could add a flimsy tin box with weather stipping from a hardware store wrapped around it????
- sorry man, there is NO way I wanted that flimsy looking POS in my car - returned mine
not trying to be mean, but those things suck and on top of it...you created yourself a chance to get a new MAF...have you price checked that little part...$250 ish
I know I am being an *** and many people have the K&N filter set up....and are happy... it didnt "do it" for me....
I've never seen or owned one of the oiled K&N setups, so I'll hold off judgement.
However, a couple weeks ago I did something dumb - tired to clean out my airbox when I was replacing my air filter. I must have gotten cleaner on the MAF itself by accident because when I started the car back up my CEL was on. The code was P0102.
There's a bench test you can run on the MAF pretty easily. Turn the key to the on position (don't even need to start the car), put a multimeter on the MAF and check the voltage. I can post details if you're feeling adventurous. Mine was way out of spec.
I figured my options were replacement (@ 300 bucks) or cleaning. I picked up a can of MAF cleaner at autozone, disassembled the whole thing and cleaned the MAF as good as I can. Now it's running like a champ. Total cost ~$6.
SWEET...love it when a $6 can of fix it in a can solves a $300 potential issue...
to the OP, you might try that! - then clean the K&N filter using the re-charge kit and then re-oil VERY SPARINGLY
might be your issue but you still need to get the code read and cleared - best of luck!!
(sorry to diss on the K&N set up)
Glad it worked for you. Cleaning my MAF bought me about 3 weeks before it threw a CEL, so I replaced with a new MAF and no more CELs, and that was 3 years ago. "They" say over oiling kills the MAF,just be sure not to over oil your K&N.
I fought the CEL battle with my K&N CAI. Took it out and haven't had a problem since. It is staying on my garage floor where I left it. It sounded great, but not worth the hassle. I have been thinking about putting on the bypass pipes that came with my car....
shannah...put the by-pass pipes on, they will NOT throw a CEL and are really fun...for a day or two, easy to un-do and you can put them on again when you get the urge...if you were close to me I would show you how, takes about 30 minutes total after the first time (which takes about 1.5-2 hrs)
they are fun....and worth trying
Ivangene: Is it just the K&N CAI you don't like or all of them in general? Why?
Healey 1968: Please post your procedure. At this point I've got nothing to lose.
Thanks all for your input. Seems like the supposed benefit of the CAI's is up for debate!
In general, NEVER oil a K&N filter on a 911... if you insist on using the set-up, leave the filter un-oiled and get one of those micro-mesh (I don't recall the name) covers that go over the filter. Then, at least you won't have to worry about oil getting on the MAF, just dirt.
the Evoms system seems pretty OK but pricey!
there are filter you can put in the stock box that will help (forget the names)
but for the most part there is zero gain in the K&N other than sound...and the fact that the tin box and pile of hardware they send you looks exactly like some home brew set up, altering the car (drill holes) and the foam thing....to flaky for me
you can add a 3.6 filter assy like this
https://rennlist.com/forums/996-foru...irbox-mod.html
but the stock filter is NOT restrictive in ANY way, so if not changing for sound...and there is NO HP gains (in fact there may be HP losses) plus risk to the MAF...all adds up to "no thank you"
hope this is helpful info
if you bought the car and it was on the car, you can land a stock set up for under $100 if you look around...for added sound drill large holes in the bottom of it - but keep in mind you are sucking in hot motor air and defeating the boxes design....
So Mike: You are not enjoying your car because you don't have a $50-$100 OBDII reader.
If you had one you could read the code and erase it and drive on.
You don't need to be at the mercy of some mechanic to read the code.
Get a scanner, Join Renntech.org, have access to all the codes for your car.
Get one and keep it in your trunk with a printout of the codes and you are good to go!
Send me a PM Mike. I have Durametric software on my laptop and an OB2 cable and can scan and read your codes for you as I live in Mississauga as well. If the CEL is steady and not flashing you can still drive your car short distances. It could be something not connected with the air cleaner. At this time of year it doesn't take much moisture to find a way into a crack on a coil that has seen heat all summer now that it's colder and wet.
I can post the pinout of the MAF sensor when I get home, but here's the procedure itself.
Find your MAF sensor, it'll have 5 wires going to it. If you disconnect the connector there are actually numbers (under the rubber boot) showing what each wire number is. You want wire #5, it's the sense line coming from the MAF sensor for air. On my car it is the solid blue wire on the drivers side.
Note: There are weather resistant blue insulators around the wire. To get the multimeter point to actually touch the connector you need to push it in. The insulator will move out of the way and you can feel when the multimeter point is in there.
You want to measure the voltage coming off of this wire to ground. A good ground point is the single 13mm bolt holding the airbox down.
Procedure:
Turn key to on position (but don't start the car).
Measure voltage between #5 and ground. A good MAF will read between .9V and 1.1V. After cleaning mine read 1.0V exactly.
Turn car on
Measure voltage, it should be higher. (I'll post exact numbers later).
I read somebody else with the same problem getting 1.17V in step 2, so the tolerance is very small. Anything above 1.1V is bad.
The whole test should only take 5 minutes. It's a very simple way to save yourself the dealer diagnostic fee.
Oh yeah, go buy a code scanner too!
Ben
I have been contemplating purchasing a CAI system for my 2000 C4, with focus on the K&N system. It seems they are the most cost friendly and most of the comments on this board seem to favor K&N. I've noticed that the issue of the oily filter has a negative effect on the MAF, is there any way of avoiding this problem
Any and all responses and suggestions are appreciated.
my k&n experience was not on my carrera but a with a bmw. put on the k&n and after a short while cel is on. obd code says maf. used the can of maf cleaner and removed k&n for stock and no light for about a year. then cel again. this time maf needed replacement. i will not use that type of product on an engine that has a maf again.
The CAI system unless it repositions the engine's air intake to a cooler location will not result in colder air entering the engine.
In the case of the 996 the engine's air intake is already located at as best I can tell the ideal location that will result in the coolest air being ingested by the engine.
So, I fail to see how a CAI that relies upon the same intake location as the stock intake system can deliver any colder air than the stock intake system.
Then you have the question of the CAI filter's efficiency compared to teh stock filter and the added complexity of cleaning and oiling the filter element.
Sincerely,
Macster.
The cai will gain hp with a reflash and a free flowing exhaust.... The system works great together with an awesome sound. Evoms is prob the best cai.... Though I think the workmanship is a joke for the amount of money you pay.....
By itself, cai does nothing but gives you a nice sound...
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