syncrogt1
07-01-2008, 11:56 AM
out of gear it seems to rev ok but under load it won't rev high, even in second gear i can't max it out(don't know what rpms though since i have no tach). engine runs smoothly, no sputtering. slight exhaust leak and in early may on the way back from Moab my exhaust manifold was glowing (in the pitch black). no check engine light.
Question is this: how to accurately tell if my cat is plugged?
1. check vacuum on the intake manifold (should be 18-20" of vacuum if cat is not plugged)
2. use infrared temp thermometer to check before and after temps on the cat (after should be higher unless cat doesn't work or is plugged).
3. Anything else?
Question is this: how to accurately tell if my cat is plugged?
1. check vacuum on the intake manifold (should be 18-20" of vacuum if cat is not plugged)
2. use infrared temp thermometer to check before and after temps on the cat (after should be higher unless cat doesn't work or is plugged).
3. Anything else?