Rough idle and surging.?

lolzor123, May 18, 5:09pm
Ok, so my 91 Mazda Familia is sometimes idling rough when warm and sometimes surges when accelerating. Have flushed radiator, replaced fuel and air filters (were both filthy!) and a wee bit better but still not right.next on the list is spark plugs. Is this likely to resolve the issue! Any other fixes people can recommend! This is getting a bit frustrating. Thanks in advance :)

franc123, May 18, 6:13pm
What engine! Carbed, single injection, multi injection, single cam, twin cam, what size! Many different ones fitted to BG Familias and many possible faults.

ninja_man, May 18, 6:44pm
clean throttle body and iac valve with cleaner. i had a similar problem on my car

jared861, May 18, 6:52pm
Probably dirty Air Flow Meter