I have an 88 Accord LX (carburetor) with roughly 183,000 miles on it.
I recently gave it a tune-up, including replacing the spark plugs and
wires, distributor and rotor, air cleaner, BOTH fuel filters, and the
PCV valve. It starts up just fine, and then after it warms up, when i
come to a stop light or something, the idle goes down to about 500
RPM's or so and the car shakes a lot. The gas mileage has gotten to be
really bad too. I don't know what could be causing it. I've checked
most of the vacuum lines with a hand pump (haven't sprayed anything on
all of them though to see if the idle goes up). I've heard that it
might be anything from the carburetor to the cat. converter. I just
want to get the dang thing fixed. PLEASE HELP!!!

P.S. - After thought. After I have been driving it for a while and
park it to go into the store or something, when I come back out, it is
most of the time harder to start than when cold and sometimes wont
even start at all. That's why I have been told that maybe it is the
cat. converter blocking up the system. I don't know.