Help Please

Derek _2 · May 29, 2011

I'll keep this issue short and sweet. My 2002 Sport Trac started to idle at around 3000rpm in Park and Neutral a few days ago. I tried repalcing the IAC Valve to no avail. I cleaned the carburetor and checked the hoses and found no issues. I'm a little stumped and looking for some advice as to what might be wrong with my truck. Thank you in advance.

I've added a short video displaying my issue. Thanks! :thumbsup:

http://www.youtube.com/watch?v=FOqok7fch0k

BrooklynBay · May 29, 2011

Do you have a check engine light with codes? Did you check the vacuum lines, and the intake manifold gaskets for leaks?

Derek _2 · May 29, 2011

No codes whatsoever. Everything is in the green. That's what has me scratching my head.

pickupman6 · May 29, 2011

isnt it throttle by wire? i had that problem with my 04 corolla. try taking the throttle motor off and see if it drops back down.

Derek _2 · May 29, 2011

The issue only exists when the connection to the AIC is connected. When it's off, the truck idles perfectly.

BrooklynBay · May 29, 2011

pickupman6 said:
Isnt it throttle by wire?

The 2004 has a throttle by wire.

ncranchero · May 30, 2011

1. Disconnect the battery for a few minutes and see if that has any effect.
2. You cleaned the "carburetor" throttle body with what? Before or after the high idle issue? You clean/re-oil that air filter before the issue?
3. Being the vehicle it is, have you checked the PCV valve for sticking open and the front elbow for cracks on the bottom side? (vacuum leaks will usually throw a lean code though)
4. Have you checked the throttle position sensor for good connection?
5. Occasionally new parts are defective. (though I doubt it in this case.)

Unrelated.........why is your air bag light on?

2000StreetRod · May 30, 2011

bad TPS?

TPS Test Procedure

Vacuum leaks usually result in much lower idle speeds than 3,000 rpm. Since the throttle plate is not stuck open I suspect the throttle position sensor.

Help Please

Derek _2

New Member

BrooklynBay

Moderator & long time member.

Derek _2

New Member

pickupman6

Well-Known Member

Derek _2

New Member

BrooklynBay

Moderator & long time member.

ncranchero

Co-moderator

2000StreetRod

Explorer Features

Explorer Features

Similar threads

Featured Content