2002 Volkswagen GTI Repair Question
Asked on September 1, 2011
Testing the exhaust for backpressure
How do I test the exhaust for excessive backpressure? And if that is the cause of the problem, would that give me my power back and help stop the roughness of the ride and idle?
Asked by msmccorkleAnswer
Replied on September 1, 2011
You need to remove the O2 sensors before the cat and using a special tool, check for back pressure. If they are bad, the only thing you can do is replace them.
Replied on September 1, 2011
The special tool goes in the hole where the oxygen sensors were then? I don't need to actually remove the cat to inspect it?
Replied on September 1, 2011
Yes, the pressure gauge screws into where the O2 sensor is removed. As far as the cat, you will know if it is bad by the back pressure. NOTE: When they plug, often times they will get so hot, they glow red hot.
Replied on September 1, 2011
Thanks for the info, I appreciate it.
Replied on September 1, 2011
Glad to help. let me know if you run into other questions.
Joe