Posted by gmharris [72.219.148.98] on Friday, February 28, 2014 at 21:38:44 :
In Reply to: I had to diagnose a loud noise one day. posted by Chriscase [107.201.17.237] on Friday, February 28, 2014 at 20:41:21 :
It may not be the problem, but I saw an interesting way to diagnose a blocked muffler or catalytic converter on newer cars.
Remove the front oxygen sensor and screw in a low-pressure gauge like a fuel pressure gauge. There should be no pressured measured at idle and only a few pounds, at most, at higher speeds.
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