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      07-25-2007, 04:52 PM   #177
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Quote:
Originally Posted by RiXst3r View Post
update... this throws a trouble code, no CEL, but it is stored...
2F6C-Exhaust Gas Flap - sends the code on each engine start

Ball bearing meathod will not cause this, just the unplugging of the wires to the solenoid in the trunk method
Quote:
Originally Posted by HyperM3 View Post
However, You DONT want to do this mod this way. This will throw codes and possibly set off your Service Engine Soon light.
I'm not convinced that one leads to the other... isn't the CEL limited to only OBDII-related failures? For example, people are seeing the standby-current code thrown all the time with no CEL.

I'm going to keep my solenoid unplugged for a while; i'll post back if it causes any problems.
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      07-25-2007, 04:55 PM   #178
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Quote:
Originally Posted by tintivilus View Post
I'm not convinced that one leads to the other... isn't the CEL limited to only OBDII-related failures? For example, people are seeing the standby-current code thrown all the time with no CEL.

I'm going to keep my solenoid unplugged for a while; i'll post back if it causes any problems.
Its not a CEL, that light is the "half-lit engine" light. The Service Engine Soon light is an emissions/exhaust related light. And correct me if Im wrong, but the valve you are now tampering with is quite exhaust related.
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      07-25-2007, 05:48 PM   #179
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Quote:
Originally Posted by HyperM3 View Post
You squeeze the metal clip against the connector. However, You DONT want to do this mod this way. This will throw codes and possibly set off your Service Engine Soon light.

DO THIS MOD WITH THE BALL BEARING!!!
OK thanks. I already did the ball bearing method. I just thought if there are no issues with the solenoid method I would do that because it was easier to go back and forth if I wanted. I'll leave it as is.
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      07-25-2007, 09:56 PM   #180
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Either way - solenoid or ball bearing - the end result is the same as far as emissions are concerned. I doubt that the flap faults by themselves would throw an SES, just like I doubt that O2 faults sans flap faults would prevent an SES.

The only difference between the two methods? How sneaky you want to be with your SA.

And for what it's worth, my flap opens within seconds of a cold start in warm weather. I'm reversing this mod when the cold weather returns.
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      07-26-2007, 08:04 AM   #181
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I did both ball and solenoid. Personally, i start with ball 7/32, that one is not a reversable. the things such a tight fit.. I try to massage the ball out for 10 min.. it won't move.. so i cut the hose to get it out. the hose is long enough for you to cut 1" off.

and then i unplug the solenoid and did not get an error. do you know the error code you got? HyperM3?

You know the gas cap not tighten give u an emission error too.....
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      07-26-2007, 08:07 AM   #182
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Quote:
Originally Posted by Shinchan View Post
do you know the error code you got? HyperM3?

You know the gas cap not tighten give u an emission error too.....
2F6C-Exhaust Gas Flap is the error code I got 26 times in 4 days. The gas cap error has its own code.
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      07-26-2007, 09:23 AM   #183
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Quote:
Originally Posted by HyperM3 View Post
Its not a CEL, that light is the "half-lit engine" light. The Service Engine Soon light is an emissions/exhaust related light. And correct me if Im wrong, but the valve you are now tampering with is quite exhaust related.
Agreed it's exhaust related... but is it affecting the net emissions of the car? The only effect I've heard so far that might be emissions-related is that it might help the cats to heat up faster. If this valve had that big an emissions impact, CARB wouldn't let you have an after-market exhaust without it.

If my dash explodes into technicolor warning lights I'll plug the solenoid back in and ask my shop nicely to re-set the ECM, otherwise I like the change. My only real issue with the stock exhaust so far has been that when there's only one cloud in the winter it looks like a single exhaust with a dummy tip. Likewise, the pasenger-side tip usually gets dirty faster than the driver's-side, which looks kind of odd until they're both pretty black.
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      07-26-2007, 09:25 AM   #184
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Quote:
Originally Posted by tintivilus View Post
If this valve had that big an emissions impact, CARB wouldn't let you have an after-market exhaust without it.
Isnt that why aftermarket exhausts have that "for off-road use only" disclaimers?
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      07-26-2007, 10:08 AM   #185
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Quote:
Originally Posted by HyperM3 View Post
Isnt that why aftermarket exhausts have that "for off-road use only" disclaimers?
Do they? I haven't been paying attention *that* closely lately, but I usually only see that disclaimer on cat-replacement pipes and such things, not on catbacks.

This appears to be the relevant section of California law (citing CA as it's in my mind the worst-case scenario)

Quote:
27156. (a) No person shall operate or leave standing upon any
highway any motor vehicle which is a gross polluter, as defined in
Section 39032.5 of the Health and Safety Code.
(b) No person shall operate or leave standing upon any highway any
motor vehicle which is required to be equipped with a motor vehicle
pollution control device under Part 5 (commencing with Section 43000)
of Division 26 of the Health and Safety Code or any other certified
motor vehicle pollution control device required by any other state
law or any rule or regulation adopted pursuant to that law, or
required to be equipped with a motor vehicle pollution control device
pursuant to the National Emission Standards Act (42 U.S.C. Secs.
1857f-1 to 1857f-7, inclusive) and the standards and regulations
adopted pursuant to that federal act, unless the motor vehicle is
equipped with the required motor vehicle pollution control device
which is correctly installed and in operating condition. No person
shall disconnect, modify, or alter any such required device.
(Emphasis added is mine)

I guess the million-dollar question would be whether the flap (or muffler, for that matter) is a "pollution control device" or just aesthetic.

I just looked up the Illinois law and it appears to be in flux; they have stopped sending out test notices for pre-1996 vehicles. I guess that means they're getting rid of the rolling-sniff-test stations and just going with electronic diagnostics. I wonder if that means they're going to add inspections like CA has...
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      07-26-2007, 10:09 AM   #186
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Quote:
Originally Posted by HyperM3 View Post
Isnt that why aftermarket exhausts have that "for off-road use only" disclaimers?
That could be one reason. Another could be sound levels. Keyword is "could" - it doesn't necessarily mean that they cause higher emissions or that they're louder than the law permits.

It just means that nobody tried to get them DOT approved, so the manufacturers want to cover their asses with a blanket statement. It's like running painted reflectors in North America - it won't make your fender fall off, and you can be pretty sure they won't cause more accidents considering that every other market in the world doesn't require reflectors - but it's illegal in North America so they carry the "off-road or show use only" disclaimer.
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      07-26-2007, 10:10 AM   #187
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Quote:
Originally Posted by PiperD View Post
That could be one reason. Another could be sound levels. Keyword is "could" - it doesn't necessarily mean that they cause higher emissions or that they're louder than the law permits.

It just means that nobody tried to get them DOT approved, so the manufacturers want to cover their asses with a blanket statement. It's like running painted reflectors in North America - it won't make your fender fall off, and you can be pretty sure they won't cause more accidents considering that every other market in the world doesn't require reflectors - but it's illegal in North America so they carry the "off-road or show use only" disclaimer.
Excellent points.
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      07-26-2007, 10:36 AM   #188
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I've unpluged the solenoid for nearly 3 weeks now and got no CEL. Don't know about any stored error codes.

But what about the guys with aftermarket exhausts? Will they all also have an Exhaust flap error code stored in their ECUs? Doesn't make a lot of sense and I would worry about it too much.
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      07-26-2007, 10:41 AM   #189
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Quote:
Originally Posted by Taimur View Post
I've unpluged the solenoid for nearly 3 weeks now and got no CEL. Don't know about any stored error codes.

But what about the guys with aftermarket exhausts? Will they all also have an Exhaust flap error code stored in their ECUs? Doesn't make a lot of sense and I would worry about it too much.
Theres a lot of codes that are stored that wont throw any dash lights. The exhaust flap is one of them. The ONLY way this code is stored is if the solenoid is unplugged, not from removing the vacuum line. The reason is the electrical connection is now disconnected. With the treatment done to the vacuum line, its just seeing it as in the open position but nothing technically wrong.

Typically with aftermarket exhausts, the vacuum line is ziptied up but still doesnt affect the solenoid.
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      07-26-2007, 10:46 AM   #190
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Quote:
Originally Posted by HyperM3 View Post
Theres a lot of codes that are stored that wont throw any dash lights. The exhaust flap is one of them. The ONLY way this code is stored is if the solenoid is unplugged, not from removing the vacuum line. The reason is the electrical connection is now disconnected. With the treatment done to the vacuum line, its just seeing it as in the open position but nothing technically wrong.

Typically with aftermarket exhausts, the vacuum line is ziptied up but still doesnt affect the solenoid.
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      07-26-2007, 10:56 AM   #191
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The solenoid connector only had two pins in it, so I'd guess it's just a current sensor like the lights. I'm sure someone will eventually come out with a solenoid-replacement resistor to block the code.

Disconnecting the solenoid just seems like a much cleaner mod than tying off the vacuum hose outside the car.

On the other hand... you could also disconnect the solenoid end of the hose and put a vacuum cap on the valve instead of messing with plugging the hot-and-dirty end of the hose
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      07-26-2007, 11:20 AM   #192
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So far, inserting the ball bearing is the best solution??
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      07-26-2007, 11:26 AM   #193
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Quote:
Originally Posted by janghs80 View Post
So far, inserting the ball bearing is the best solution??
Correct.
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      07-26-2007, 11:35 AM   #194
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I should have told you that if you poor a bit of water down the tube you can ge it out.

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Quote:
Originally Posted by Shinchan View Post
I did both ball and solenoid. Personally, i start with ball 7/32, that one is not a reversable. the things such a tight fit.. I try to massage the ball out for 10 min.. it won't move.. so i cut the hose to get it out. the hose is long enough for you to cut 1" off.

and then i unplug the solenoid and did not get an error. do you know the error code you got? HyperM3?

You know the gas cap not tighten give u an emission error too.....
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      07-26-2007, 12:06 PM   #195
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LOL.. I unplug the damn solenoid, and kept the vacuum line plug in. I did not get any CEL error.
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      07-26-2007, 12:10 PM   #196
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Quote:
Originally Posted by Shinchan View Post
LOL.. I unplug the damn solenoid, and kept the vacuum line plug in. I did not get any CEL error.
At which point are people going to read every post?

You WONT get a dashboard warning light from this, just stored fault codes.

Secondly, if you are to get an emissions related warning it will be in the form of a "Service Engine Soon" light. The new CEL is what looks like a half filled in engine.
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      07-26-2007, 12:22 PM   #197
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Quote:
Originally Posted by Shinchan View Post
LOL.. I unplug the damn solenoid, and kept the vacuum line plug in. I did not get any CEL error.
It's storing a code. The open question is not whether that code causes an error (it doesn't) but whether it can contribute to errors thrown; ie, would the 2F6C in combination with some other code (x) cause an SES where (x) alone would not have.

Hyper, I read your other thread, and I think your O2 sensor codes (2CAB/2CA7) should definitely have caused an SES/CEL/etc failure on their own regardless of other codes you may have had stored at the time.

That said, I'm not a professional... I pays my money an I takes my chances
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      07-26-2007, 12:24 PM   #198
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Quote:
Originally Posted by tintivilus View Post
Hyper, I read your other thread, and I think your O2 sensor codes (2CAB/2CA7) should definitely have caused an SES/CEL/etc failure on their own regardless of other codes you may have had stored at the time.
And they did. They were the reason the light came on, not because of the exhaust flap.
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