why is my truck surging when parked it races between 8-11rpm and why does my tru on 2002 Dodge Ram 1500

my truck jumps forward when put into gear

by in Las Vegas, NV on March 14, 2014
2 answers 4 comments
ANSWER by on March 14, 2014
Its idling to high ,its sucking air under throttle body gasket or a bad IAC motor.
COMMENT by on March 14, 2014
iac motor where is it what does it look like
COMMENT by on March 15, 2014
Its on the side of the throttle body,idle air controller ,or its the throttle position sensor ,if u have a scanner ,u can monitor these component s And see if there working properly ..or u can take a gamble and change both ,just my opinion.
ANSWER by on March 14, 2014
Do you hear a vacuum leak, at the back and bottom of the plenumn is a vacuum port that goes to the oil filler, that hose does rot and create a bad vacuum leak. The IAC is next to the TP switch.
COMMENT by on March 14, 2014
thanks i will check it out first thing tomm
COMMENT by on March 15, 2014
If u spray starting fluid around area or over air lines and it idles down ,you'll find your leak but be careful .