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Farting in the wind.....that's rich!!!:D
I'm kinda coming to the same conclusions also. I would love, love, love to get the Fabspeed headers but I just don't have that kind of cash at the moment. I did have an opportunity to get a used replacement stock header/cat but chickened out at the last moment worrying that I might just end up with another defective cat. I guess I need to explore that route again if I want to take care of this problem. This seems like the cheapest route. I still need to make this car quieter though. Even before the headers it was too loud with the Borla mufflers. It was suggested to try the Dansk (sp?) but I'd sure like to hear it from inside the car before I pop for a different muffler. Anyone in the Charlotte, NC area have a Dansk on their Boxter S I could listen to? Jeff |
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Well said!! I go thru the same thing on some other car forums for the same reasons -- many people think that all DTC's are linked to specific components. Regards, paul... |
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After thinking more about your issues I think your problem is in the removal of the primary cats. Most guys opt for the cat bypass pipes that replace the secondary cats and leave the primaries alone. The cat bypass pipes also give a mellow growl that the secondary cats muffle. Hope you get it straightened out. |
Hmmm, sounds like a stock modified muffler might be for me. That droning is enough to drive you nuts!!!
I was all set to get rid of the secondary cats. Unfortunately just before I did it I realized that it was the primary cat and not the secondary that was making the nasty embarrassing rattle. The innards had come loose and once it got hot it sounded awful. I didn't have a choice. Oh well, no idea what to do now that will fit into my budget. I suppose a used header/primary cat is the best way to go at this point. I HATE EMISSION CONTROLS!!!!! I am curious as to why only one bank is getting a cel though. Jeff |
I had a Borla muffler on my '88 BMW M3. It was so loud my wife wouldn't drive with me. It drove me crazy too, so I trashed it and went back to stock.
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Ya, I think Horror-la Exhaust would be a better name. Of course if I were to wear a helmet all the time it most likely wouldn't be so bad:)
My friend at Autozone, who has had a long and varied history messing with cars, said that the easiest thing to do at this point is to gut my two stock primary cats and put them back on the car. He said that doing that will solve the back pressure issue even without the innards in the cats and hopefully get the motor running smooth again. Seems to me that I'm still going to get a CEL for the lack of difference in readings between the pre and post oxygen sensors. Does anyone know what gutting the stock primary cats will do from first hand knowledge? Jeff |
Still no idea what to do about the muffler. I like the idea of a stock muffler with the baffles removed but I will miss the sharp looking tips of the Borla. I wonder if I could get the tips from the Borla put on a stock muffler? Hmmmmm....
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If your primary cats are gutted you will get a CEL and it may or may not solve your back pressure issue. You might look around at places like Oklahoma Foreign and see if you can find a set that work for cheap. Good luck. |
Get yourself a secondary o2 emulator. The secondary o2 only checks the performance of the Cat, because you have none of course it will code without some sort of fix!
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Hey,
I took a quick look at O2 emulators online but didn't find one that said it would work with my car yet. I'm still concerned that the new headers have made the car run rougher though so I'm not sure that would be the best approach. It also said on the description of the CEL code that an exhaust leak could also cause my problem. I'm not exactly sure how to check for that. An exhaust leak would explain why I'm getting the code on only one bank of cylinders though. I did manage to find a stock muffler for a Boxter S on Ebay for $165. I'm going to change that out when it arrives before doing anything more about the code. I did have a line on a used primary cat/header before deciding on the headers. I may go that route as all of the other options look like they could cause other issues or not resolve the current one. How much would you all think my used Borla should go for if I sell it? Maybe I can include a set of shooting ear protectors in with the deal!;) Jeff |
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Most likely a stupid question but what exactly is a smoke test?
I've heard the ticking exhaust leak on other vehicles before and there's nothing that obvious occurring here. I did have exhaust leaks at the sleeves that go between the secondary cats and the muffler when I bought the car but it was a much less obvious noise. With that leak I could feel the exhaust escaping when I put my hand near the sleeve. Problem here is with that Borla muffler it's kinda hard to hear much of anything and be certain what it is. When I went to thicker oil I did notice the start up clatter died down to almost nothing though. As soon as I get my new muffler I'll get back under the car and give the headers a good close look. I'd really rather stick with the headers but I'm still thinking my best bet will be to get a used header/cat if I just want to not go through the hassles. I've got issues with all five of my vehicles at the moment and I sure would like to cross one off my list........and not by setting it on fire!!!!:D Jeff |
Here's your answer smoke machine wise.
Randy Pelican Technical Article: Troubleshooting Boxster Vacuum Leaks - 986 / 987 |
Hey all!
Well I got a used Boxter S stock muffler from a place called German Recycling (or something like that) off Ebay for $165 shipped. Pretty good price I think. I installed it yesterday and I can now hear again! It may well be too quiet for me but I'm going to live with it for a while before I decide whether or not I'm going to remove the baffles. I'd also like to find an S in my area with the baffles removed before I go and cut anything. If there's anyone in the Charlotte, NC area who has an S with the stock muffler and the baffles removed let me know. Right now I've got the battery disconnected to reset the CEL though I'm sure this isn't going to take care of my problem. I do hear a little ticking that could be an exhaust leak so I guess a smoke test is in order next. What kind of places do this or do I need to take it to the dealer? Is there any chance of damaging anything with the CEL on? It did seem to run rougher at highway speed but that could just be my imagination. Is there any chance that the computer would lean out the motor too much to the point of damage? I'd like to take the car on a 2000 mile trip and I don't think I can get the CEL fixed before I go. Thanks, Jeff |
CEL on could mean you'd probably be getting bad mileage and running that way for 2k miles probably wouldn't be good for other smog controlling items which could get expensive in the long run.
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Hmm, seems pretty basic to me. You've removed the CATs and now you're getting the code that indicates a CAT failure. I've never heard of anyone successfully rigging the system to not trigger a CEL when they've remove the CATs. On my car, I have the Fabspeed muffler / headers with integrated CATs so that the car knows and sees that they are still there. I think that if you want to live life without the CATs, then you'll have to accept the CEL being on. On these modern cars, the flow restrictions from the CATs are fairly minimal - you don't typically gain gobs of horsepower through their removal.
-Wayne |
I didn't remove the primary cats to gain horsepower. The innards in one of the primary cats came loose making a horrible racket and I couldn't stand it anymore. The headers were the cheapest way to go. I guess I'll see if I can find an inexpensive used drivers side primary cat/header. My only concern is the crap shoot of getting a used one that may be just as bad as mine is. Anyone have a known good one they'd like to part with?
Jeff |
I see that I can get a new primary cat/header for around $400 shipped. They're obviously not OEM. Will these be okay or is it another instance of a low quality part I'm going to have trouble with fairly quickly or is a cat a cat?
Thanks, Jeff |
Update.....so I got the new used stock Boxster S muffler installed and I'm thrilled. It sounds great but I imagine it may be a little quiet for some peoples tastes. So now I'm getting around to battling the CEL. Unless I find a crack in the new headers or an exhaust leak at the head I'm going to have to get another cat to replace the defective drivers side one. I see online that I can get a cat new for around $400 but every one I see says it's for the 2.7 liter motor.
Is there any difference between the primary cats for the 2.7 and the 3.2 motors? Will these cats interchange? Thanks, Jeff |
Final update......problem solved. Out of frustration I decided to put my stock primary cats back on the car and just deal with the noise one of them makes for now. While I was looking inside of the problem cat it looked like every thing was in tact. I expected that the material would be coming apart. When I tapped the cats on the floor each made sounds that were quite different. The good one was a thud where the bad one made more of a rattle. It came to me that maybe the innards weren't coming apart but that the whole cat insert was loose within the outer shell. So what I did was put the cat in my vise and squeezed each end just a bit thinking that might lock the insides in place. Amazingly enough it worked so I have no more rattle and no more CEL!!!
So if anyone is interested I have a set of headers with the relocated O2 sensors and a Borla muffler for sale. The Borla had a broken bracket on one of the mufflers that has to be repaired but other than that is in perfect shape. Jeff |
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