performance exhaust?
Thread Starter
Heel & Toe
Joined: Apr 2005
Posts: 19
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performance exhaust?
Hi all. I have a question for you guys that I can't seem to figure out on my own. I was on ecklers.com looking at chambered exhausts for my C4. I can't seem to notice any difference in the two of these kits other than 300 dollars. Let me know if you have any ideas, or if this would even be a good kit for me.
http://www.ecklers.com/product.asp?d...FRTN3JN6WUD8VB
http://www.ecklers.com/product.asp?d...FRTN3JN6WUD8VB
Now, I have another question. My dad and I got into a bit of a tiff the other day over whether or not performance exhaust/intake will cause the service engine light to come on. He seems to think that any time you mod a newer car, the computer can't handle it and will go crazy at the slightest provocation. I really don't think it will matter because the new flow is covered by the stock range in the sensors, etc. Let me know if any of you have experienced any problems with a performance kit on your C4. Thanks.
http://www.ecklers.com/product.asp?d...FRTN3JN6WUD8VB
http://www.ecklers.com/product.asp?d...FRTN3JN6WUD8VB
Now, I have another question. My dad and I got into a bit of a tiff the other day over whether or not performance exhaust/intake will cause the service engine light to come on. He seems to think that any time you mod a newer car, the computer can't handle it and will go crazy at the slightest provocation. I really don't think it will matter because the new flow is covered by the stock range in the sensors, etc. Let me know if any of you have experienced any problems with a performance kit on your C4. Thanks.
Team Owner
Joined: May 2001
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From: ...tearing up the highways, one state at a time™®©
Originally Posted by bigbadspoon
Now, I have another question. My dad and I got into a bit of a tiff the other day over whether or not performance exhaust/intake will cause the service engine light to come on. He seems to think that any time you mod a newer car, the computer can't handle it and will go crazy at the slightest provocation. I really don't think it will matter because the new flow is covered by the stock range in the sensors, etc. Let me know if any of you have experienced any problems with a performance kit on your C4. Thanks.
If the car is before OBD II, you can run straight pipes w/ out issues of codes - cars w/ straight pipes and OBDII, you have to simulate the cats to the PCM
Thread Starter
Heel & Toe
Joined: Apr 2005
Posts: 19
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It's a 1995, so it should be OBDI. We attached a diagnostic tool to it at school one day, and it had an OBDII port, but none of the OBDII diagnostic tools, so I am assuming it's an OBDI, just built late in the year.
Are you sure those are just straight pipes? They look like the bolt onto the cats.
Are you sure those are just straight pipes? They look like the bolt onto the cats.
Race Director
Joined: May 2001
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It entirely depends on where the modifications reside. On an OBDI car, any exhaust modifications downstream of the oxygen sensors will not affect it at all, likewise any modifications upstream of the MAF and IAT sensors will not affect it at all.
On an OBDII car this is the same except you have to deal with the second set of oxygen sensors which monitor the effecitiveness of the catalytic converter. If you tamper with the cats these second sensors will give you trouble. You can can simulators for them or you can also turn them off in the computer.
On an OBDII car this is the same except you have to deal with the second set of oxygen sensors which monitor the effecitiveness of the catalytic converter. If you tamper with the cats these second sensors will give you trouble. You can can simulators for them or you can also turn them off in the computer.
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Joined: Jul 2003
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by bigbadspoon
Now, I have another question. My dad and I got into a bit of a tiff the other day over whether or not performance exhaust/intake will cause the service engine light to come on. He seems to think that any time you mod a newer car, the computer can't handle it and will go crazy at the slightest provocation. I really don't think it will matter because the new flow is covered by the stock range in the sensors, etc. Let me know if any of you have experienced any problems with a performance kit on your C4. Thanks.
