Long Tube and H-Pipe OBDII emissions test
03-06-2008, 07:27 AM
#2
4th Gear Member
Join Date: Oct 2007
Location: Harrisburg PA
Posts: 1,778
RE: Long Tube and H-Pipe OBDII emissions test
Is your car throwing any CELs? Do you have the rear O2s turned off?
In order to pass the rear O2 sensors (and all emissions sensors)must be on, the system must be "Ready" and no emissions related DTCs can be present. By "Ready" it means all systems have been functioning through several drive cycles (on/off, couple hrs of driving).
In order to pass the rear O2 sensors (and all emissions sensors)must be on, the system must be "Ready" and no emissions related DTCs can be present. By "Ready" it means all systems have been functioning through several drive cycles (on/off, couple hrs of driving).
03-07-2008, 06:03 PM
#3
2nd Gear Member
Join Date: Nov 2007
Location: CO
Posts: 439
RE: Long Tube and H-Pipe OBDII emissions test
Zero ifa visual inspection is part of thetest....However, that depends a little onwhat kind of mood the tech/inspector is in, and how much he/she actually knows about cars.
Problem #1: it is against the law to remove a functioning catalytic converter....this includes replacing it with an aftermarket high flow unit.
Problem #2:nobody manufactures CARB certified long tube headers for the 4.6.... a tech with a keen eye and stick up his butt will fail you.
Problem #3: if you have dissabled any O2 sensors, an ODBII test will automatically result in failure. It has nothing to do with the tech. They hook up the tool, and if there are any problems, the computer automatically ends the test andprints a nice note tellingyou to return when you've fixed the problem.
That being said, as long as you aren't showing any trouble codes, the visual inspection may not even be an issue. If your car is in good tune, it should pass a sniffer test with flying colors. Some places are more stringent about their testing than others.
Problem #1: it is against the law to remove a functioning catalytic converter....this includes replacing it with an aftermarket high flow unit.
Problem #2:nobody manufactures CARB certified long tube headers for the 4.6.... a tech with a keen eye and stick up his butt will fail you.
Problem #3: if you have dissabled any O2 sensors, an ODBII test will automatically result in failure. It has nothing to do with the tech. They hook up the tool, and if there are any problems, the computer automatically ends the test andprints a nice note tellingyou to return when you've fixed the problem.
That being said, as long as you aren't showing any trouble codes, the visual inspection may not even be an issue. If your car is in good tune, it should pass a sniffer test with flying colors. Some places are more stringent about their testing than others.
Thread
Thread Starter
Forum
Replies
Last Post
Luke9222
4.6L General Discussion
19
10-22-2015 11:55 PM
TfcCDR
V6 (1994-2004) Mustangs
1
09-14-2015 12:08 PM
