ive got a 91 se with 250 miles and when its starts and runs hard (miss firing i think) as i drive it some times gets better do u think it could my the spark plugs or the stock distributor cap or do u think i should expect some thing more serious?

 

well try the cap, rotor, and plugs first since they are cheap. Then if that doesnt fix it go ahead and get some wires (probably should anyway since it has so many mile on them...probably the stock set).

If that doesnt fix it then there are some pieces you can clean such as the TB but most likely it will be the injectors since they are bad about going out anyway.

 

Sometimes the only way to fix something is just try different parts. I know it can get expensive, but try the cheapest parts then work your way up. Sometimes that's the only way.

 

Read everything in here.
http://www.cybrrpartspro.com/Chilton...1ch04_idx.html