IT sounds like a throttle position sensor (TPS) of a Idle Air Control Valve (IAC). Is the check engine light on?
Joe
Feb 16, 2009 at 5:35 AM
RIVERBOAT
MEMBER
3 POSTS
Joe; TPS ,MAPS, are new parts. Ck engine light does not come on.used code analizer-showed no codes ,then erased codes.
Feb 16, 2009 at 9:12 AM
JACOBANDNICKOLAS
✓Experienced Mechanic
110,248 POSTS
Hi:
Have you checked fuel pump pressure? Is power normal other than the surge?
Feb 16, 2009 at 9:34 AM
RIVERBOAT
MEMBER
3 POSTS
yes I have,and presure is normal
Feb 16, 2009 at 9:38 AM
JACOBANDNICKOLAS
✓Experienced Mechanic
110,248 POSTS
If the electrical end is good and fuel pressure is good, the only things left are a vacuum leak or catylatic converter may be plugging. Have you checked for these problems?