• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

4.0 high idol (about 1800rpm)


Ohhnulix

New Member
Joined
Dec 9, 2020
Messages
15
Reaction score
3
Points
3
Location
Dade city
Vehicle Year
2002
Make / Model
Ford ranger
Transmission
Automatic
I recently bought a 01 4x4 4.0. The only issue I’ve found is a high idol, about 1800rpm, when I turn the ac off it jumps to about 2000, I would imagine that a vaccum leak would make the hubs not lock and all that seems fine, any ideas? No check engine lights or codes
 


Rock Auto 5% Discount Code: 70D65189E6D8FF: January 5th, 2022

Madman54

Member
ASE Certified Tech
Joined
Jan 30, 2010
Messages
40
Reaction score
10
Points
8
Location
Utah
Vehicle Year
1992
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
My credo
Stop skipping steps and get it done right the first time.
possible causes right off the top of my head and in no particular order....
Dirty throttle body/throttle plate
IAC valve gummed up
vacuum leaks (may be heat induced and therefore only happen when car is warmed up/hot)
sticky throttle cable or cable out of adjustment.
slipping belt.

do the rpms always sit at 2000? or is it only for a short time after you turn the ac off?
 

Ohhnulix

New Member
Joined
Dec 9, 2020
Messages
15
Reaction score
3
Points
3
Location
Dade city
Vehicle Year
2002
Make / Model
Ford ranger
Transmission
Automatic
possible causes right off the top of my head and in no particular order....
Dirty throttle body/throttle plate
IAC valve gummed up
vacuum leaks (may be heat induced and therefore only happen when car is warmed up/hot)
sticky throttle cable or cable out of adjustment.
slipping belt.

do the rpms always sit at 2000? or is it only for a short time after you turn the ac off?
I forgot to update the thread, I figured it out. The air cleaner didn’t get properly installed so a bug got sucked into the intake, I took the IAC valve off and there’s a butterfly caught between the valve😂
 


Top