engine knocking and rough idle on 1992 Nissan Pickup (D21)

engine knocks when i gas it and the idle keeps jumping but when i gas it it accelerates good

by in Puyallup, WA on February 28, 2011
1 answer
ANSWER by , August 05, 2011
check EGR vacum hose and or the EGR valve may need to be cleaned or replaced