We have a test for this in the automotive repair industry if you did suspect a cat problem. If a cat gets clogged (slightly, not to the point of necessarily causing significant power loss), then you drill this little tiny hole in the exhaust pipe before the cat and then install this backpressure testing gauge. Then if you have more than a couple psi of backpressure under eng. load (or during the condition that drivability problem exists), then your cat, or muff, or something is posing a restriction. Then you put a rivet in that hole you drilled to close it back off. Also don't overlook O2 sensor problems, as they don't always set codes (even though OBD II seems to be a fairly accurate system). Sometimes checking O2 switching and reading with an actual voltmeter hard wired to the sensor is the best way to tell what it's doing. As far as the dogs, nobody ever trained me about those. I can't fix those
'95 CONTOUR SE
-Enkei 16s
-Porsche944 Exhaust tip
-
Audi xenon projector headlights
-Peterbilt 30" air horns
-mp3 Aiwa headunit (150 songs on one disc)
-dual 10s
-soon to have LED tailights (real kind, not just gay bulbs)
-That's it for now
