bhawk
New Member
- Joined
- Jul 18, 2008
- Messages
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- Vehicle Year
- 1994
- Transmission
- Manual
We are plagued by the high idle condition that many ranger owners seems to have. I've read many threads on this forum on the issue but none really address my question. How does the device work?
It seems from my looking at it off the truck, when it is disconnected, the default position is to block the passage so no air can by pass the throttle plate and get into the intake. I assume that when it is connected to voltage, the solenoid pushes against that rod and opens the passages somewhat. Correct?
So, when the truck is cold and you're starting it for the first time, does it need air and therefore the solenoid needs full voltage to push that plunger open all the way?? or is it the opposite, on a cold start there should be no voltage at the solenoid so that it blocks air to the engine?
I'm really trying to figure out why disconnecting the IAC after the truck is at operating temp causes our idle to move down from a high of 1000 rpm to a real nice 650 rpm. But with the IAC disconnected, it is very hard to start and if it does, you have to hold the gas pedal down to hold it at 1000 rpm.
It seems from my looking at it off the truck, when it is disconnected, the default position is to block the passage so no air can by pass the throttle plate and get into the intake. I assume that when it is connected to voltage, the solenoid pushes against that rod and opens the passages somewhat. Correct?
So, when the truck is cold and you're starting it for the first time, does it need air and therefore the solenoid needs full voltage to push that plunger open all the way?? or is it the opposite, on a cold start there should be no voltage at the solenoid so that it blocks air to the engine?
I'm really trying to figure out why disconnecting the IAC after the truck is at operating temp causes our idle to move down from a high of 1000 rpm to a real nice 650 rpm. But with the IAC disconnected, it is very hard to start and if it does, you have to hold the gas pedal down to hold it at 1000 rpm.