sounds like it could be the fuel pump or throtalbody unit also if the injectors have not been cleaned that could be a problem.
SOUNDS like another 92 model that nobody wants to change the spark plugs on cause they are hard.
Many times on these vans all 4. The cap, wires, rotor, and plugs all need to be replaced.
For all you changing plug wires a good way to tell how old they are is that the original spark plug wires are numbered from the factory.
it could be your starter selinoide which should be in the engine compartment near the battery and the big waire from your battery goes to it!
O2 Sensor.
Fuel pump, Ignition timing, spark plug misfire, fuel filter, air filter, take it to a mechanic.
A plugged or partially plugged EGR valve could cause that.
try changing your oxygen sensor I have changed the oxygen sensor and it did not help. Do you have any other ideas? Could it be the carb?
The cabin air filter can not cause a rough idle. It only filters the air for the ac/heater.
i have to same problem with my sierra ive changed the filter and it still leaks, i was told that its the oil filter adapter you can get one at autozone for about $20
Were you having problems before you changed the filter? If yes you probably have a bad fuel pump; if no there is likely some kind of fuel blockage in the supply lines or filter. Again, it still could be the fuel pump.
Coolant lines? Shift linkage? could also be the rear or front seals leaking
Check your fuses could be an electronic issue.
Have you changed the air filter too?
was fuel filter replaced