Need Help

[cooterdog]

Ok I have a 1995 4x4 splash thats started to act up. What it does started the other day. Upon turing the key it fired up and died upon returning the key it reved up to approx 2000 rpm and dropped to approx 800 or so as it warmed up. Today it was idling it self up while just idling to approx 1500. Any idea's why? My guess was a throttle control sensor but dont know FORDS all too well.

Thanks
Rob

 

[Doom's Day Custom]

I would guess the iac sensor is acting up which is you idle air control which will cause that !!!!

 

[cooterdog]

I would guess the iac sensor is acting up which is you idle air control which will cause that !!!!

Wheres it located on so I can go get anouther if thats possible!

Thanks
Rob

 

[bbbb51]

not sure what engine u have but here is a pic. It might help. http://www.explorerforum.com/forums/showthread.php?t=84220

 

[cooterdog]

I still have one problem with my Ford Ranger truck after putting a new IAC sensor on. The truck idles at around 800 but reves to approx 1200 every 20seconds while in the park position, I didn't notice it while sitting at a red light but maybe I wasn't there long enough. I had to replaced the IAC, Altinator and Battery all at once due to a bad Altinator. Anybody any sugestions?

Thanks
Rob

 

[cooterdog]

Anybody??

 

[Nhaz]

The IAC isn't a sensor as such, its a Solenoid controlled by the computer. If the idle is going up and down. then the IAC is actually working. You need to find out why the computer is telling the IAC to turn on and off when it should not be.

Temperature sensor maybe. The one the computer uses not the one the dash gauge uses.

Possible bad grounds or the temp sensor wire is grounding somewhere.

 

[adsm08]

A rolling idle on a Ford is usually an indicator of a sticking IAC, it is still working, but its getting stuck. The computer is not seeing the changes in idle that it wants so it gives the valve more power, it breaks free, the idle shoots up way past where the computer wanted, and so it pulls back on the power and it drops down too far. If you replaced it with a used unit, its probably gummed up. If you used a new unit it may still be adjusting. The battery having been replaced may have also cleared the computer's memory and so it may still be re-learning its strategy. I had to replace my computer earlier this year and it took a good 3 months for it to fully learn a good strategy and for the truck to stop running funny.

 

[cooterdog]

A rolling idle on a Ford is usually an indicator of a sticking IAC, it is still working, but its getting stuck. The computer is not seeing the changes in idle that it wants so it gives the valve more power, it breaks free, the idle shoots up way past where the computer wanted, and so it pulls back on the power and it drops down too far. If you replaced it with a used unit, its probably gummed up. If you used a new unit it may still be adjusting. The battery having been replaced may have also cleared the computer's memory and so it may still be re-learning its strategy. I had to replace my computer earlier this year and it took a good 3 months for it to fully learn a good strategy and for the truck to stop running funny.

Its a brand new IAC unit so maybe it will just take time to set itself up but how long I wonder?

Rob