Bad Idle

[RedRanger1998]

Hello All,
I have a 1998 Ranger 3.0 5M. I am having an issue with the truck not wanting to return to idle when I engage the clutch, I do not have any way of measuring the RPMs because I have no tach, but I can hear the RPMs increase when they should be returning to idle. I have replaced the Idle air control valve, and the spark plugs are newish and I have cleaned the throttle body multiple times, but the issue just comes right back after a couple drives or if it sits overnight. If you have had a similar experience any insight would be great, or if there is anything else to fix or clean. Or if I need a new throttle body or something.

 

[CorbinsRanger]

You might find something here...

reving high when depressing clutch...

Hey guys. I need some help.when I'm driving and I push in the clutch to shift. The rpms on my truck go up to 2900 by its self.... When I hold in the clutch and coast to a stop the rpms stay at 2900 till I get stopped them it will idle down.... Any ideas? I'm lost....

www.therangerstation.com

 

[helpme]

Vaccuum leak? I thought they all had tachs.

 

[RedRanger1998]

Hello All,
I have a 1998 Ranger 3.0 5M. I am having an issue with the truck not wanting to return to idle when I engage the clutch, I do not have any way of measuring the RPMs because I have no tach, but I can hear the RPMs increase when they should be returning to idle. I have replaced the Idle air control valve, and the spark plugs are newish and I have cleaned the throttle body multiple times, but the issue just comes right back after a couple drives or if it sits overnight. If you have had a similar experience any insight would be great, or if there is anything else to fix or clean. Or if I need a new throttle body or something.

UPDATE: wasn’t a vacuum leak or anything, when they put on the new IAC they didn’t reflash the computer. When I brought it back the reflashed it and the problem went away. Didn’t expect a truck made in this time period to need that but it did, so I would try they if you’ve tried everything else.