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Codyp86

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What is this? Finger is pointing at it.
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jrollf

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Cold high idle solenoid. it pushes up the throttle lever to increase RPM at idle when the engine is cold.

1993 F350 Crew Cab Dually
XLT
7.3 Factory IDIT w/Banks Sidewinder
5spd Manual
 

Codyp86

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Cold high idle solenoid. it pushes up the throttle lever to increase RPM at idle when the engine is cold.

1993 F350 Crew Cab Dually
XLT
7.3 Factory IDIT w/Banks Sidewinder
5spd Manual
Should it be loose when not on the motor? If so I might need to change it.


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Cubey

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Should it be loose when not on the motor? If so I might need to change it.


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My F250's hasn't been working for a couple years I don't think, and starts it fine. Being so far south like you are, I wouldn't worry about it too much unless you get it free or cheap. Basically, if the engine doesn't noticeably drop in idle speed after a short running/driving time, then it isn't working. I can really tell when it kicks off on my RV, if I am at idle or nearly so when it shuts off. It just keeps the throttle open wider than normal at idle. You could just lightly press the throttle when cranking to give it a little extra air and fuel when cranking it.
 

genscripter

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Mine has always failed ever since I first got my first IDI. I've just ignored it. You can pull the wire from the connector, or you can pull the wire from the temp sensor switch on the head. Both will disable the CHIS.
 

genscripter

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Mine has always failed ever since I first got my first IDI. I've just ignored it. You can pull the wire from the connector, or you can pull the wire from the temp sensor switch on the head. Both will disable the CHIS.
 

Cubey

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Mine has always failed ever since I first got my first IDI. I've just ignored it. You can pull the wire from the connector, or you can pull the wire from the temp sensor switch on the head. Both will disable the CHIS.

The temp sensor by the thermostat housing is broken on the F250, which is why it doesn't work on there. I bought a NOS sensor but never found the need to install it. Giving it a little throttle manually does about the thing.

Kind of amazing it still works on the E350. I seriously think it's still under 100k miles from little things like that. (Pesky 5 digit odometer)
 

nostrokes

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Should it be loose when not on the motor? If so I might need to change it.


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Yes when is not engaged with the throttle lever it will be loose and just flop around. I had to put some loctite on mine to keep it from backing out.
 

jrollf

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Mine still works, 200k+ miles... however my temp switch recently stuck in the on position so i disconnected it until i get a new one.

I live on the gulf coast, 60 degrees is cold :) truck starts fine without it.

FYI, the temp switch also engages the cold timing advance in the IP, so if you disconnect the switch you'll disable that to.

1993 F350 Crew Cab Dually
XLT
7.3 Factory IDIT w/Banks Sidewinder
5spd Manual
 

Cubey

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FYI, the temp switch also engages the cold timing advance in the IP, so if you disconnect the switch you'll disable that to.

Yep and my F250 still does decently without it down to around 25 degrees.
 

Codyp86

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Sounds good. I’m not going to worry too much about it then. I was just curious as to what it was. Thanks a lot y’all. Do any of y’all know where I can find someone to help me time it the right way? I’m down around Galveston.


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nostrokes

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Sounds good. I’m not going to worry too much about it then. I was just curious as to what it was. Thanks a lot y’all. Do any of y’all know where I can find someone to help me time it the right way? I’m down around Galveston.




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Wes is in bulverde look for thewespaul he may be able to help you out or know someone close to you.
 

Thewespaul

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That’s me! Let me know if you make it up this way, be happy to time and tune the truck for you at the shop.
 

nostrokes

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Bulverde is a pretty good ways from me. But I will see if he can help. Thanks nostrokes


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I was just thumbing through the timing service registry and member trevtron is in the Huston area. You could hit him up and see if he's able to help too.
 
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