Hard starting at times idles well skips and bucks when starting to drive on 1998 GMC Jimmy

Changed plugs . Very hard to start at times , when I get it started it idles well but when I get going it skips and bucks.

Asked by for the 1998 GMC Jimmy
2 answers 2 comments
How many spark pluges does your engine have? Then we have a clue as to what motor we are talking about!
2.3 8 pluger
Just as i thought! Adjust the carb. check point gap and choke stove. Heat riser may be stuck. Vacuum advance inop.
Centrifugal weight springs can be changed so mechanical advance override is prevalent!
ck fuel pressure, may be to low caused by fuel pressure regulator or pump