Erratic idle in 1995 Jetta, help?

The jetta seems to have the hicups when idling. it idles fine at 900, but studders a lil bit. Suggestions anyone? Im thinking its a worn cap/rotoror possibly clogged injectors?

Thanks..

You, probably, have a clogged/sticky/dirty idle stabilizer valve, a pretty common problem, but ut costs a bit fix.