Trying to imagine electronic Idle increase switch
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Senior User
Joined: Oct 2002
Posts: 272
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From: Grande Prairie, AB
Trying to imagine electronic Idle increase switch
I want to install a high idle switch to increase my idle for cold weather warmups, sorta like a cruise for the engine like big trucks use for high idle. I got a '96 302, MAF, now I have to figure out how Im going to make voltage go back to the computer to jump the idle up, I thought of a mechanical hook up, but that reminds me of old 3406B's, lmao. Anyone know how I would do this?
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Senior User
Joined: Oct 2002
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From: Grande Prairie, AB
Yeah but it idles at 1200 for about a minute, then drops to 800 rpm for the rest of the warm up, I wanted to have the idle at about 2000RPM consistantly until the switch is turned off, not this bullsh*it 1200 for one minute, thats garbage.
Elder User
Joined: Jul 2001
Posts: 773
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From: torrington,ct
i dont know that there is a way to do it in your truck with out setting code. i guess you could find a wiring diagram and see if the iac is ground switched or power switched and wiring in power or a ground to it thru a secondary swith in the cab but you need to be careful of sending power or ground to spots were it's not supposed to be i.e. if the iac is 12v power switched and you wire in a switch to send 12v to the iac, you would need a diode on the computer side of were ever you wire in at to keep from back feedin voltage to the computer. but what i dont know is, will the computer pick up that high idle and set a code, escpicialy being obdII.
You might be better off wiring up and mounting a solenoid to push the throttle open some.
You might be better off wiring up and mounting a solenoid to push the throttle open some.
Posting Guru
Joined: Jan 2001
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From: Nebraska
Why would the IAC be faulty if it's now idling like it should? 1200-1300 for about a minute, then 650-700. The computer bumps it up to around 900 if it's been idling a couple minutes.
I think I remember reading somewhere that around 1600 is all the IAC can do at its max. Like the above post says, you'd have to be very careful wiring into computer circuits. The IAC is pulse width modulated on the ground side by the computer. There'd probably be no way around setting a code if it did work.
Maybe there's some way to rig up a throttle kicker solenoid off a 70's or early 80's carburetor. 12v to them and they bumped the throttle open some for a/c, etc.
I think I remember reading somewhere that around 1600 is all the IAC can do at its max. Like the above post says, you'd have to be very careful wiring into computer circuits. The IAC is pulse width modulated on the ground side by the computer. There'd probably be no way around setting a code if it did work.
Maybe there's some way to rig up a throttle kicker solenoid off a 70's or early 80's carburetor. 12v to them and they bumped the throttle open some for a/c, etc.
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Elder User
Joined: Jul 2001
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From: torrington,ct
ya because the computer should pick up the uncalled for increase, maybe set a tps sensor code or something, computer would think your on the throttle but the tps isn't picking it up. i think a secondary solenoid is really the best bet.
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Elder User
Joined: Sep 2007
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From: Kalamazoo, MI
Originally Posted by brown 4x4
Why would the IAC be faulty if it's now idling like it should? 1200-1300 for about a minute, then 650-700. The computer bumps it up to around 900 if it's been idling a couple minutes.
I think I remember reading somewhere that around 1600 is all the IAC can do at its max. Like the above post says, you'd have to be very careful wiring into computer circuits. The IAC is pulse width modulated on the ground side by the computer. There'd probably be no way around setting a code if it did work.
Maybe there's some way to rig up a throttle kicker solenoid off a 70's or early 80's carburetor. 12v to them and they bumped the throttle open some for a/c, etc.
I think I remember reading somewhere that around 1600 is all the IAC can do at its max. Like the above post says, you'd have to be very careful wiring into computer circuits. The IAC is pulse width modulated on the ground side by the computer. There'd probably be no way around setting a code if it did work.
Maybe there's some way to rig up a throttle kicker solenoid off a 70's or early 80's carburetor. 12v to them and they bumped the throttle open some for a/c, etc.
Fleet Mechanic
Joined: Sep 2003
Posts: 1,279
Likes: 0
From: savannah,ga
fire and ems vehicles have a high idle after market solenoid
this allows high idle for extended periods and keeps
the charging and cooling systems functioning
it also has saftey features you should look at
brake pedal interupt is a must
if the switch is left on and then put in gear
O chit , hear we go
this allows high idle for extended periods and keeps
the charging and cooling systems functioning
it also has saftey features you should look at
brake pedal interupt is a must
if the switch is left on and then put in gear
O chit , hear we go
"Mifflin Clay"
Joined: Jul 2005
Posts: 3,177
Likes: 4
From: Mifflin, PA
Originally Posted by mhg
fire and ems vehicles have a high idle after market solenoid
this allows high idle for extended periods and keeps
the charging and cooling systems functioning
it also has saftey features you should look at
brake pedal interupt is a must
if the switch is left on and then put in gear
O chit , hear we go
this allows high idle for extended periods and keeps
the charging and cooling systems functioning
it also has saftey features you should look at
brake pedal interupt is a must
if the switch is left on and then put in gear
O chit , hear we go
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