High Idle Timing Advance Switch

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Jun 23, 2014 | 10:16 PM

Macs1964F100

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From: San Antonio

High Idle Timing Advance Switch

Can the high idle/timing advance switch be changed without removing the thermostat housing? I went to change mine today and it looked like it will hit the thermostat housing before it comes out of the block. Do I need to get a thermostat housing gasket before changing the switch?

Jun 23, 2014 | 11:18 PM

Macrobb

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There are two solenoids. The high idle one is external, and no, it will come out just fine. Just pull the two bolts, remove your springs and out it comes.

The timing advance is internal to the IP, and is the second wire going to the top. You probably don't need to mess with that.

Jun 24, 2014 | 04:41 AM

tjc transport

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From: Marlboro Mental Hospital.

i never tried removing the sensor, but i would imagine you will have to remove the t-stat housing and the alternator to access it.

Jun 24, 2014 | 08:34 AM

Macs1964F100

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From: San Antonio

Quote:

Originally Posted by tjc transport

i never tried removing the sensor, but i would imagine you will have to remove the t-stat housing and the alternator to access it.

The good news is I just replaced the thermostat so I know how to do that, the bad news is I have to do a 2 hour job again to get to a 30 second part.

I am going to get the gasket just in case. There is just enough room to get an open end 7/8 wrench on the sensor. Not sure if there is enough to get it out. That is poor planning on International's part.

Jun 24, 2014 | 09:24 AM

tjc transport

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From: Marlboro Mental Hospital.

in internationals defense, you are the first person i have ever heard of in 26 years that needed to replace that sensor.

Jun 24, 2014 | 09:51 AM

jayro88

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Quote:

Originally Posted by tjc transport

in internationals defense, you are the first person i have ever heard of in 26 years that needed to replace that sensor.

Really? I have one sitting in my garage right now to be replaced when I flush my coolant and replace the thermostat. I did a search and found quite a few threads about this. The thing is that it really isn't a necessary sensor. Mine was bad when I purchased my van a little over 2 years ago. I just unplugged it and did without the high idle/timing advance feature. I know a number of others have just wired the feature to a switch in the cab (like the glow plugs) and turn it on when starting the vehicle in colder environments.

To the OP, if I remember correctly it is possible to change it without removing the thermostat but you do need to drain some coolant or you will lose some out the hole when you remove the plug. Of course, this is just what I have read since I have not done mine yet.

Jun 24, 2014 | 08:17 PM

Macrobb

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Quote:

Originally Posted by jayro88

I just unplugged it and did without the high idle/timing advance feature. I know a number of others have just wired the feature to a switch in the cab (like the glow plugs) and turn it on when starting the vehicle in colder environments.

I'm currently running it to a dash switch as well -- My switch *was* only for the high idle, with the sensor/relay driving the advance, but I needed that advance to start when hot once(IP's pretty well shot), so I just jumpered them together and called it good.