Check Engine light after header/Bullets install
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 1,097
Likes: 1
Check Engine light after header/Bullets install
so i called OnStar
they said that the diagnostics came back in the 'yellow' area, which meant it will not damage the engine, but it might affect engine performance. they said it is not an emegency, but i should take the car to the dealer within the next 7 days. the diagnostic review went on further to say there was some sort of emmisons problem.
my question is: could this be an oxygen sensors? what exactly is an 'emmisions problem' anyway? i know we moved the cat's back a bit for the headers to go on (as indicated in the instructions), but they HAD to be moved back. could that be why the light is on? i drove the car over 150 miles back home to Scranton PA from Kerbeck on Tuesday. no light after the trip. today, after going golfing 2 miles up the road, the light came on. sound strange?
if anyone has experienced this, please shed some light on the situation for me. what do i need to do? should i even take the car to the dealer? should i have it checked by my local mechanic (my uncle) instead? help help help!
thanks
phil
they said that the diagnostics came back in the 'yellow' area, which meant it will not damage the engine, but it might affect engine performance. they said it is not an emegency, but i should take the car to the dealer within the next 7 days. the diagnostic review went on further to say there was some sort of emmisons problem.
my question is: could this be an oxygen sensors? what exactly is an 'emmisions problem' anyway? i know we moved the cat's back a bit for the headers to go on (as indicated in the instructions), but they HAD to be moved back. could that be why the light is on? i drove the car over 150 miles back home to Scranton PA from Kerbeck on Tuesday. no light after the trip. today, after going golfing 2 miles up the road, the light came on. sound strange?
if anyone has experienced this, please shed some light on the situation for me. what do i need to do? should i even take the car to the dealer? should i have it checked by my local mechanic (my uncle) instead? help help help!
thanks
phil
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Originally Posted by smdio
so i called OnStar
they said that the diagnostics came back in the 'yellow' area, which meant it will not damage the engine, but it might affect engine performance. they said it is not an emegency, but i should take the car to the dealer within the next 7 days. the diagnostic review went on further to say there was some sort of emmisons problem.
my question is: could this be an oxygen sensors? what exactly is an 'emmisions problem' anyway? i know we moved the cat's back a bit for the headers to go on (as indicated in the instructions), but they HAD to be moved back. could that be why the light is on? i drove the car over 150 miles back home to Scranton PA from Kerbeck on Tuesday. no light after the trip. today, after going golfing 2 miles up the road, the light came on. sound strange?
if anyone has experienced this, please shed some light on the situation for me. what do i need to do? should i even take the car to the dealer? should i have it checked by my local mechanic (my uncle) instead? help help help!
thanks
phil
they said that the diagnostics came back in the 'yellow' area, which meant it will not damage the engine, but it might affect engine performance. they said it is not an emegency, but i should take the car to the dealer within the next 7 days. the diagnostic review went on further to say there was some sort of emmisons problem.
my question is: could this be an oxygen sensors? what exactly is an 'emmisions problem' anyway? i know we moved the cat's back a bit for the headers to go on (as indicated in the instructions), but they HAD to be moved back. could that be why the light is on? i drove the car over 150 miles back home to Scranton PA from Kerbeck on Tuesday. no light after the trip. today, after going golfing 2 miles up the road, the light came on. sound strange?
if anyone has experienced this, please shed some light on the situation for me. what do i need to do? should i even take the car to the dealer? should i have it checked by my local mechanic (my uncle) instead? help help help!
thanks
phil
If this is the problem, and not a faulty sensor or wire, then the solution is to keep the exhaust heat from escaping before reaching the cats by coating or wrapping the header to retain more heat.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 1,097
Likes: 1
Originally Posted by MarineC6
What kind of headers did you install? The cats will move from the OEM position after header install but that in itself will not trigger a light. Are you using an x-pipe? Did you reinstall all 4 o2 sensors? Meaning--if you're using o2 sims, are the front sensors installed? You can get away with o2 sims at the rear. Maybe a sensor wire came in contact with the header or cat? Need alittle more info.
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
Your problem is your cats and 02's, and probably 1 7/8 primaries
I Installed kooks system, that's 3 inch cats x-pipe,and 3 inch all the way to the pipes over the rear end. My cats are located where the C5 cats were and still never set a code from the first day. I have no idea what kind of 02's you got but the factory are the best. Again, no codes.
If you've been on this forum and read any of these header threads you should have picked up that most of these guys myself included are using a tried and proven product, KOOKS, they work and no codes. What I know about dynatech is first there 1 7/8 primaries which are useless on the street with a bone stock motor. If you're not over 400 cu and making 500RWHP these headers are not helping you at all. In this case bigger is not better and will kill your performance. And if there using random cats they will set a code. Since you've already spent the money, your between a rock and a hard place, and there's no easy fix.
I wish I had an answer for you.
Andy G.
If you've been on this forum and read any of these header threads you should have picked up that most of these guys myself included are using a tried and proven product, KOOKS, they work and no codes. What I know about dynatech is first there 1 7/8 primaries which are useless on the street with a bone stock motor. If you're not over 400 cu and making 500RWHP these headers are not helping you at all. In this case bigger is not better and will kill your performance. And if there using random cats they will set a code. Since you've already spent the money, your between a rock and a hard place, and there's no easy fix.
I wish I had an answer for you.
Andy G.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 1,097
Likes: 1
Originally Posted by andreas g.
I Installed kooks system, that's 3 inch cats x-pipe,and 3 inch all the way to the pipes over the rear end. My cats are located where the C5 cats were and still never set a code from the first day. I have no idea what kind of 02's you got but the factory are the best. Again, no codes.
If you've been on this forum and read any of these header threads you should have picked up that most of these guys myself included are using a tried and proven product, KOOKS, they work and no codes. What I know about dynatech is first there 1 7/8 primaries which are useless on the street with a bone stock motor. If you're not over 400 cu and making 500RWHP these headers are not helping you at all. In this case bigger is not better and will kill your performance. And if there using random cats they will set a code. Since you've already spent the money, your between a rock and a hard place, and there's no easy fix.
I wish I had an answer for you.
Andy G.
If you've been on this forum and read any of these header threads you should have picked up that most of these guys myself included are using a tried and proven product, KOOKS, they work and no codes. What I know about dynatech is first there 1 7/8 primaries which are useless on the street with a bone stock motor. If you're not over 400 cu and making 500RWHP these headers are not helping you at all. In this case bigger is not better and will kill your performance. And if there using random cats they will set a code. Since you've already spent the money, your between a rock and a hard place, and there's no easy fix.
I wish I had an answer for you.
Andy G.
i think your bias for Kook's is standing in the way of the actual answer to my problem. the problem could very well be a simple O2 sensor gone bad. and i have also had my car dyno tested before i added the Dynatech headers. im going to have it tested again rather soon, and im assuming im going to see an increase in HP, much to the opposite of what you are saying.
thanks for the help though, or lack there of.
