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Old June 26th 08, 10:14 PM posted to rec.autos.makers.vw.watercooled
Lost In Space/Woodchuck[_4_]
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Posts: 73
Default Exhaust plugged up

one way to check for a plugged cat is with a manifold vacuum gauge. under
light throttle at cruising speeds up to about 70mph the vacuum should stay
higher. If it drops off it maybe a sign of a bad cat.


"Dioclese" <NONE> wrote in message
...
> Apparently, there's no test for a plugged catalytic converter per your
> reply. THAT is what I'm trying to determine before jumping to something
> else. Just dust in the wind is what I'm getting... Nevermind.
>
> --
> Dave
> "dave AKA vwdoc1" > wrote in message
> ...
>> If something is wrong......fix it!
>> If you want someting better...........change it! ;-)
>>
>> No don't just change the 02 sensor to another location unless you have
>> to.
>> Now if you install another exhaust manifold and downpipe and neither had
>> a spot for the multi-wire 02, then put it on the cat. :-)
>>
>>
>> "Dioclese" <NONE> wrote in message
>> m...
>>> No, banging on the catalytic converter indicates sound innards.
>>>
>>> Reason I'm asking the question is because I had a bad coolant sensor in
>>> the past. It took me some time to figure it out, a month. The tailpipe
>>> is badly blackened, engine was running very rich.
>>>
>>> Are you saying to physically remove the O2 sensor to see if there's
>>> difference in engine power at higher rpms, like climbing hills on the
>>> highway? If so, I can see that's markedly decreased in my observations.
>>>
>>> --
>>> Dave
>>> "dave AKA vwdoc1" > wrote in message
>>> ...
>>>> Now does the cat rattle?
>>>>
>>>> Some muffler places will drill a hole near the entrance of the cat to
>>>> determine backpressure.
>>>> I have removed a plug (02 sensor) to determine that.
>>>>
>>>> What is the engine doing or not doing?
>>>> I always recommend rechecking the camshaft timing!!!
>>>> --
>>>> later,
>>>> (One out of many daves)
>>>>
>>>> "Dioclese" <NONE> wrote in message
>>>> m...
>>>>> How does one determine if a catalytic converter is sufficiently
>>>>> plugged up to affect the engine?
>>>>>
>>>>> --
>>>>> Dave
>>>>>
>>>>
>>>>
>>>
>>>

>>
>>

>
>



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