Diagnosing Exhaust Restrictions

This topic has 2 replies, 3 voices, and was last updated 11 years, 10 months ago by ssewall.

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January 4, 2013 at 4:41 pm #488418
EricTheCarGuy
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This one kinda goes with the catalytic converter video. I had a lot of people suggest that because the catalytic converter was not doing it’s job that it was clogged and causing a restriction, that’s not always the case and this video shows how to verify that. I look forward to your comments.
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January 4, 2013 at 11:14 pm #488507
Rob
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My engine is turbocharged. Will this test still work or would I have to remove the o2 sensor like you were talking about?
January 5, 2013 at 8:23 am #488657
ssewall
Participant
A few questions about this Eric:

1. Should I expect similar behavior from the OBDII output of a MAP sensor?

2. Does this only apply if the car is in neutral/park? My map sensor readings show I’m building vacuum at about 2000 RPM on the road but actually go down when I rev to 2000 at idle.

3. Should the car be at operating termperature for this?
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