86 5000 TQ Shutter?

[Ivan Tuma]

A few things to look at ... don't know if they will help ... If your car 
is also idling rough ...

1. Is your check engine light in working order, and if so, is it coming 
on while you are driving?
   - Do you know how to check the error codes yourself?

2. Check the distributor cap, wires for cracks or wetness and check the 
plugs...
   - Step through as follows (I do this while the car is running, but I 
don' t recommend it if you're not comfortable):
      Be very gentle with the plug wires ... try to pull them out as 
close to the base of the spark plug as possible.

       1. Stop the engine.
       2. Disconnect one plug wire from the plug
       3. Start the engine again.
       4. Test for a rough idle.
       4. Stop the engine
       5. Put the plug wire back Repeat the above for each plug.

    - If you notice there is no difference after you pull one of the 
plugs ... you've at least narrowed it down to a certain
       cylinder. Now it's a matter of diagnosing whether you have a fuel 
system (injector/fuel distributor?) or electrical (plug/wire/distributor 
cap/hall sender) problem.
       Water, humidity and ice might have done some damage or worsened 
an existing problem during the snow.

3. During the snow, could you have gotten any water into the fuel 
system? ... This is a little far fetched, but are you running on a new 
tank of gas since the storm?

Hope that helps you narrow it down a little.

Ivan