94 taurus wagon 3.0 V6. There is a tube coming from the fuel injection
stuff that runs to the exhaust manifold. There is a small metal tube coming
from that to a rubber tube and that leads to the DPFE EGR sensor. (part
I was climbing a steep hill on Saturday when the vacuum hose popped off.
Since then, any time I accellerate, the vacuum hose pops off.
I was thinking that the only thing that might cause this is excessive
exhaust back pressure. That made me think perhaps a plugged catalytic
converter. - Well, this car has two catalytic converters and there seems
to be unrestricted exhaust flow at the tailpipe (I have no way to test the
pressure, but there seems to be ample flow of exhaust coming from the pipe)
The car seems to have enough power, but the exhaust flowing out of that
little metal tube is quite loud. Further, the only problem with the cars
performance I've noticed so far is an inability to adjust to normal idle
when comi8ng to a stop. It bounces back and forth from 500 to about 1000
RPM two or three times when I come to a stop.
Could there be any other cause than plugged catalytic converters?