testing converter?
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Laughing Gas
Joined: Mar 2005
Posts: 765
Likes: 1
From: ct
testing converter?
I think my cat converter is bad.I was told if i take off the 02 sensor and it runs better then the converters bad.do I have to take the oxygen sensor off or can I just unplug it to test it?
Elder User
Joined: Feb 2007
Posts: 601
Likes: 1
From: Chicagoland
I can't see how unplugging it work make any difference re the cats. I think the idea was to take the sensor out completely so if the cats are fused then the back pressure goes out the open sensor bung instead.
Lead Driver
Joined: Feb 2002
Posts: 7,958
Likes: 592
From: Greater Austin, Texas
To test for any kind of exhaust restriction, you need a vacuum gauge. Check your vacuum at idle, then run the motor up to 3000 rpm and hold it there for about 30 secs or so. If the vacuum reading is lower than at idle, you have an exhaust restiction.
Postmaster
Joined: Jan 2009
Posts: 4,558
Likes: 2
You should be able to get a hand held gauge at most auto stores , just hook it to one of the ports on the vacuum tree on the manifold , you can operate the throttle from under the hood or the hose should be long enough to go into the cab,,,
