mk2 16v running issues

[re2]

the car is new to me but it has a low rev irregularity. Its running regular unleaded and is an '87 on kjet. There are no apparent air leaks and it has a new set of plugs. The revs are rougher between 1500-2500 but it still pulls near enough like id expect. It starts fine and idles well enough

Any ideas?

I plan to take it to Vince but Id like to iron out anything obvious first

[Diamond Hell]

New plugs, but how old are the leads, dizzi cap and arm?

Unless you've replaced them then you've not really started on diagnosis.

[re2]

good point but already in place to be swapped for new. Just bought it so Im doing the obvious first and the previous owner had already put the plugs in

any other sugestions?

[danny_p]

once done the basics  if that dosent fix it.  look at the injectors and compression.

stuck, leacking or cloged injector will make it rough  so will low compression on one cylinder