Test pipe check engine light
Thread Starter
HAHA
Joined: Nov 2005
Posts: 5
Likes: 0
Test pipe check engine light
99 ls / I added a bolt-on test pipe to my setup this weekend cold air intake, headers catbakc exhaust cam gears, and clutch. The car is running good, and fast, but after a few hours driving the car with the test pipe, my check engine light came on. Since i got the car 1 year and a half ago, the light has never came on. I know it is from the O2 sensors because of the high flow fuel because the car is confused with no cat. But what is funny ever since the check engine light came on the car has been running crazy fast. Down low and even more up top. I lost nothing, but gained a lot. Mayve that is because I have an RSR ex mag. Someone told me i could get wideband o2 sensors to fix the check engine light possibly. Also I plan on adding an apex afc to tune the car. WHat do y ou guys think
Still Water
Joined: Aug 2004
Posts: 1,236
Likes: 0
From: San Diego
I'm not sure what your question is exactly... I'm guessing it's "how can i turn off the cel?" Well you've said it yourself, it's due to your 2nd o2 sensor (bank2) which lets the ecu know if your cat is doing it's job. Since there's no cat, Your Cel will always be on. Buy a highflow cat: No cel, legal, better for our enviroment and just as good.
Apathy Kills
Joined: Nov 2002
Posts: 60,714
Likes: 0
From: The Left Lane
• Ditch the test pipe.
• If your state will let you, run a high-flow cat instead, matched to your header diameter.
• Once an operational catalytic converter has been fitted and both O2 sensors are plugged in and operational, pull the + (positive terminal) battery connector and let the car sit for 10 minutes.
IMPORTANT: If you have an OEM radio installed, be sure you have the Anti-Theft code in hand BEFORE DISCONNECTING THE BATTERY.
• Once 10 minutes have elapsed, reconnect the battery and go for a drive.
If the Check Engine Light comes back on during your drive, retrieve the code using the directions in our FAQ thread. Then come back to us for assistance.
---
And ignore your friend's advice.
A wideband oxygen sensor would not fix the problem on it's own.
The OBD-II networks expect to see a drastic reduction in post-catalytic converter o^2 content. When both narrow-band sensors report the same level of o^2, the ECU figures that either a) the cat is not performing properly or b) it isn't there at all.
• If your state will let you, run a high-flow cat instead, matched to your header diameter.
• Once an operational catalytic converter has been fitted and both O2 sensors are plugged in and operational, pull the + (positive terminal) battery connector and let the car sit for 10 minutes.
IMPORTANT: If you have an OEM radio installed, be sure you have the Anti-Theft code in hand BEFORE DISCONNECTING THE BATTERY.
• Once 10 minutes have elapsed, reconnect the battery and go for a drive.
If the Check Engine Light comes back on during your drive, retrieve the code using the directions in our FAQ thread. Then come back to us for assistance.
---
And ignore your friend's advice.
A wideband oxygen sensor would not fix the problem on it's own.
The OBD-II networks expect to see a drastic reduction in post-catalytic converter o^2 content. When both narrow-band sensors report the same level of o^2, the ECU figures that either a) the cat is not performing properly or b) it isn't there at all.
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Last edited by TheOtherDave™; Dec 15, 2005 at 02:34 PM.
Senior Member
Joined: Aug 2004
Posts: 125
Likes: 0
From: originally from WA
Originally Posted by TheOtherDave™
• Ditch the test pipe.
• If your state will let you, run a high-flow cat instead, matched to your header diameter.
• Once an operational catalytic converter has been fitted and both O2 sensors are plugged in and operational, pull the + (positive terminal) battery connector and let the car sit for 10 minutes.
IMPORTANT: If you have an OEM radio installed, be sure you have the Anti-Theft code in hand BEFORE DISCONNECTING THE BATTERY.
• Once 10 minutes have elapsed, reconnect the battery and go for a drive.
If the Check Engine Light comes back on during your drive, retrieve the code using the directions in our FAQ thread. Then come back to us for assistance.
---
And ignore your friend's advice.
A wideband oxygen sensor would not fix the problem on it's own.
The OBD-II networks expect to see a drastic reduction in post-catalytic converter o^2 content. When both narrow-band sensors report the same level of o^2, the ECU figures that either a) the cat is not performing properly or b) it isn't there at all.
• If your state will let you, run a high-flow cat instead, matched to your header diameter.
• Once an operational catalytic converter has been fitted and both O2 sensors are plugged in and operational, pull the + (positive terminal) battery connector and let the car sit for 10 minutes.
IMPORTANT: If you have an OEM radio installed, be sure you have the Anti-Theft code in hand BEFORE DISCONNECTING THE BATTERY.
• Once 10 minutes have elapsed, reconnect the battery and go for a drive.
If the Check Engine Light comes back on during your drive, retrieve the code using the directions in our FAQ thread. Then come back to us for assistance.
---
And ignore your friend's advice.
A wideband oxygen sensor would not fix the problem on it's own.
The OBD-II networks expect to see a drastic reduction in post-catalytic converter o^2 content. When both narrow-band sensors report the same level of o^2, the ECU figures that either a) the cat is not performing properly or b) it isn't there at all.
I
Joined: Jan 2001
Posts: 56,525
Likes: 0
From: Westside til I die
Does your test pipe have a bung for the O2 sensor? If so, the reason the light is on, is that the O2 sensor is getting a reading that it's not supposed to get. A way around this, is to tie the sensor up under the body, and wrap it in tin foil...just expose it to atmospheric air.
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Apathy Kills
Joined: Nov 2002
Posts: 60,714
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From: The Left Lane
Originally Posted by jjang
lovin the white font ha
h: Actually, that was entirely accidental. Sorry.I've always used the black/grey scheme and I got sloppy in removing a highlight color for the bold underlined text. No wonder you guys couldn't read it. :uhhok: Oops.
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Thread Starter
HAHA
Joined: Nov 2005
Posts: 5
Likes: 0
I never checked the code, but with the test pipe I got a good amount of power. I had a high-flow cat, but it started to make noise from inside. I was going to buy wideband o2 sensors, get an afc to tune the fuel and adjustable fuel regulator, and also there is a thing called the 02 simulator that tells the computer that the o2 sensors are ok. As for the envirnoment, it is not that serious when compared to tractors or any fucked up car spitting out smoke. My car does not even give off fumes or anything. Thanks for the posts guys.
I
Joined: Jan 2001
Posts: 56,525
Likes: 0
From: Westside til I die
Originally Posted by Iceberg157
I never checked the code, but with the test pipe I got a good amount of power. I had a high-flow cat, but it started to make noise from inside. I was going to buy wideband o2 sensors, get an afc to tune the fuel and adjustable fuel regulator, and also there is a thing called the 02 simulator that tells the computer that the o2 sensors are ok. As for the envirnoment, it is not that serious when compared to tractors or any fucked up car spitting out smoke. My car does not even give off fumes or anything. Thanks for the posts guys.
Actually it does emit significantly more emissions than a car equipped with a cat.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget
2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget