In my '83 n/a, when I'm romping on it, sometimes there's a wierd hesitation before the motor starts rolling. Even then, it's not "quite right".

I get the same hesitation just rolling along on the highway around 78mph (3100ish rpm).

Any ideas or thoughts what this might be???

 

No one....? Maybe an insect in the air filter? or something.....?

 

Just throwing an idea, but maybe a slipping clutch? Or possibly the timing could be a bit off.
John 82ZXT

 

Check out your ignition. Make sure the rotor has good motion. Take off the cap and twist the rotor with your hand. Let it snap back into place. This will assure your mechanical advance is working properly.

check the position of the adjusting nut at the base of the distributor. It should be in the middle with a little bit of gap on either side. The little 10mm bolt rests in a slot. Losen that bolt, thurn the distributor counterclockwise a little untill the gap is just barely gone. (the lower end, towards the driver's side) This will advance your ignition a litte. If your mechanical or vaccume advance is messed up, advance the distributor all the way with the adjustment I just described.
Now drive your car and see if that helped. If it did then something was wrong with your ignition. Maybe even just replace your spark plug wires and spark plugs.

 

I suggest change your air and fuel filters if not done so already and checking adjustment on TPS as well as checking the ignition as mentioned above............

 

I did the air/fuel filter thing....I'll mess with the timing this weekend. It just seems wierd that it only happens in third...

 

Sorry for the delay......My timing's just fine.

Seems like the old gal just doesn't like cold weather.