The smog test does not test the muffler of your Jeep and you will not fail
for having a hole in it, but we don't recommend you take your car in for
smog testing if the hole is large because... it may dilute your Jeep's
exhaust to the point the smog machine will not allow the smog technician to
even begin the smog check.
If your Jeep's muffler is intact but has hole/s consider this: Smog machines
are calibrated in California (every three days) and are designed not to
allow the testing of vehicles which emit oxygen levels exceeding the smog
machines preset limits. If the holes on a muffler were large enough to where
fresh air would be vacuumed into a car's exhaust stream, the test results
would be incorrect, and the smog machine may not even allow the smog
inspection to
begin or continue. Worst case scenario would be the smog test begins, and is
aborted halfway. You'd be required to pay the smog inspection fee, without
getting smog check results or a smog check certificate. We have to recommend
you get the muffler replaced before the smog test.
