I bought the car last august and have not done a tune up or anything yet. My HC was 2.2 (.8 allowable) and CO was 36.3 (15 allowable). The car has chip and a manual boost controller. Do these mods make a difference on emissions?? Also, what other things can i do to pass the test??

And is this something that any respectable shop can diagnose or should i take it to a porsche shop??? Any other advice??

 

well, there is the free way, and it will work. It will not fix emissions permantently by any means.

I did this 2 years ago with the same problem when I neede to pass mine.

Disconnect one of your fuel injector wires. This makes the car run sluggish, but it will be fine there and back. It's easy to do, and FREE. Basically what this does is give you a 3 cylinder and an air pump to DRASTICALLY improve the air ratios coming out the exhaust pipe.

If you are looking for a long term solution, send it to a shop though.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by RMills944:
<strong>well, there is the free way, and it will work. It will not fix emissions permantently by any means.

I did this 2 years ago with the same problem when I neede to pass mine.

Disconnect one of your fuel injector wires. This makes the car run sluggish, but it will be fine there and back. It's easy to do, and FREE. Basically what this does is give you a 3 cylinder and an air pump to DRASTICALLY improve the air ratios coming out the exhaust pipe.

If you are looking for a long term solution, send it to a shop though.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica"><img border="0" title="" alt="[Eek!]" src="eek.gif" /> Why the hell didn't I think of that!? *Smacks head* <img border="0" alt="[thumbsup]" title="" src="graemlins/bigok.gif" />

 

Wait 'till the tank is almost empty, dump in a little alcohol, get it tested, then fill the tank to dilute whatever is left. I've gotten a few highly modded cars through that way.

 

Wascally Wabbits!

 

The car is running rich. It may be your O2 sensor.
If it is not working correctly not only will it not pass emissions, you are using excess gas.

 

Go to a Porsche shop and have them adjust your CO and whatnot! Your car CAN pass emissions when it is dialed in correctly.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica"> well, there is the free way, and it will work. It will not fix emissions permantently by any means.

I did this 2 years ago with the same problem when I neede to pass mine.

Disconnect one of your fuel injector wires. This makes the car run sluggish, but it will be fine there and back. It's easy to do, and FREE. Basically what this does is give you a 3 cylinder and an air pump to DRASTICALLY improve the air ratios coming out the exhaust pipe.

If you are looking for a long term solution, send it to a shop though.

</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">can anyone else attest to this? Or will this cause some kind of problems?? And will this solve both the HC and O2 problem??

 

With my car, it was the O2 sensor. Replaced it, and it passed with no problems. If your O2 sensor is shot, the car's not running right anyway, so it's worth checking out.

 

Another easy way is to adj the AFM with spring tension. You have to be very careful and move it back to where it was to start after the test. counterclockwise = richer, clockwise = leaner.(If you run lean to long, you can do some major damage.) I would suggest to give it a tune-up first.

 

my car is running alot leaner now that i have all my vacuum leaks fixed up.

 

Possible causes (in my experience):

1. Incorrectly adjusted AFM. This can be corrected by a shop with a CO meter for 1 hours worth of labor (or less).

2. Filters: fuel/air -&gt; just replace them. They are probably due anyway.

3. Ignition: Spark plugs, wires, cap, rotor. Normally I would say replace all of this too, but wires are expensive for our cars. This is your call. Personally, I would bit the bullet and do it.

4. Catalytic converter. If you car has more than 60k on it, it may just need a new one. But if their is something specific that is killing it, you should get this fixed. Possible causes are anything that would make you burn oil (valve stem seals, rings, etc). Maybe even an overly rich condition from an incorrectly adjusted AFM.

5. Bad O2 (oxygen/lambda) sensor. Just like an incorrectly adjusted AFM this can screw up your mixture. I say just replace this like your filters and ignition components.

6. Bad fuel pressure regulator and/or fuel pressure damper. If these have never been replaced you should probably do it.

These are not all of the possible causes, just the more likely ones. For example you could also have a leaky fuel injector.