Last (and only) cold start advance/high idle post/question

Rrent

Member
49
59
18
Location
Texas
Truck is not where I am, but will be tomorrow. Let me be sure I understand correctly.
There is a temp sensor - back of passenger head. It runs the injection pump advance and high idle - via a green wire (to both?). The wire should have voltage prior to warmup -no voltage after.
The truck can live without this up advance and cold/high idle - but will take longer to warmup and might smoke during this warmup? But I should not run truck if ip advance is continuous on?
I’m 4++ decades of gas engine experience, but well less than a single year of diesel know how.
Thanks in advance.
R
 

Barrman

Well-known member
4,617
341
83
Location
Giddings, Texas
Yes, the green wire does both the fast idle solenoid and the cold advance in side the injection pump. Except for about 6 days a year here in Texas you don’t need it.
 

Rrent

Member
49
59
18
Location
Texas
Yes, the green wire does both the fast idle solenoid and the cold advance in side the injection pump. Except for about 6 days a year here in Texas you don’t need it.
Thank goodness on the 6 days a year- cause the fast idle and injection pump advance have juice going to them long after the M1009 has “warmed up”. Good news: both disconnected, not so good I could not locate the temp sensor on the passenger side head..?
Left (driver’s side) sure thing.
Plus found whatever is in this picture.413063EE-7416-4248-8245-57738A9194C5.jpeg
 
Last edited:

dependable

Well-known member
1,697
143
63
Location
Tisbury, Massachusetts
Sensor is at back of head facing firewall, kind of hard to get at. If I recall, the one for fast idle circuit is on passenger side, the one on other head is for glow control.
 

Barrman

Well-known member
4,617
341
83
Location
Giddings, Texas
Look at the drivers side head right behind the alternator and above the exhaust. You will see the temperature idiot light sensor. Since the heads for both sides are the same casting. The same hole for the sensor on the drivers side is the hole in the head at the rear of the passenger side for the green wire. It should just be a sensor with two male blades on it. The green wire plugs into one of the blades. The other is always hot with the ignition on. I have found several in the past where the post are touching.

I have also had some where the sensor shorts out internally and the fast idle is on like you have. I have better luck changing the sensor out from the top since you don't get coolant all over you that way.
 

Rrent

Member
49
59
18
Location
Texas
Look at the drivers side head right behind the alternator and above the exhaust. You will see the temperature idiot light sensor. Since the heads for both sides are the same casting. The same hole for the sensor on the drivers side is the hole in the head at the rear of the passenger side for the green wire. It should just be a sensor with two male blades on it. The green wire plugs into one of the blades. The other is always hot with the ignition on. I have found several in the past where the post are touching.

I have also had some where the sensor shorts out internally and the fast idle is on like you have. I have better luck changing the sensor out from the top since you don't get coolant all over you that way.
Thanks - that makes much better sense than where I was looking.
 

Rrent

Member
49
59
18
Location
Texas
Truck is not where I am, but will be tomorrow. Let me be sure I understand correctly.
There is a temp sensor - back of passenger head. It runs the injection pump advance and high idle - via a green wire (to both?). The wire should have voltage prior to warmup -no voltage after.
The truck can live without this up advance and cold/high idle - but will take longer to warmup and might smoke during this warmup? But I should not run truck if ip advance is continuous on?
I’m 4++ decades of gas engine experience, but well less than a single year of diesel know how.
Thanks in advance.
R
Found the glow plug sensor…C52FD315-6262-4A23-82A5-3589B2EFA32A.jpeg
 

ezgn

Well-known member
Steel Soldiers Supporter
187
279
63
Location
Lake Elsinore Ca.
Found the glow plug sensor…View attachment 847654
Are you sure that is the right one? I'm not sure about that one. I think Standard Motors makes one for around $75.00 I thought you were referring to the glow plug sensor on the passenger side head. I might have read the post wrong. that looks like it might be for the drivers side head.
 

dougco1

Well-known member
707
270
63
Location
Cooperstown NY

Rrent

Member
49
59
18
Location
Texas
Truck is not where I am, but will be tomorrow. Let me be sure I understand correctly.
There is a temp sensor - back of passenger head. It runs the injection pump advance and high idle - via a green wire (to both?). The wire should have voltage prior to warmup -no voltage after.
The truck can live without this up advance and cold/high idle - but will take longer to warmup and might smoke during this warmup? But I should not run truck if ip advance is continuous on?
I’m 4++ decades of gas engine experience, but well less than a single year of diesel know how.
Thanks in advance.
R
Truck is not where I am, but will be tomorrow. Let me be sure I understand correctly.
There is a temp sensor - back of passenger head. It runs the injection pump advance and high idle - via a green wire (to both?). The wire should have voltage prior to warmup -no voltage after.
The truck can live without this up advance and cold/high idle - but will take longer to warmup and might smoke during this warmup? But I should not run truck if ip advance is continuous on?
I’m 4++ decades of gas engine experience, but well less than a single year of diesel know how.
Thanks in advance.
R
I have both sensors either in-hand or in-coming. I’m guessing this picture (back right/side head) is the sensor/plug for the cold start/ high idle. The plug looks like it’s seen better days… possible the reason for the incorrect function of the cold start/ high idle system…FB2CEF92-D0CC-469D-ADFB-258DFE22DBD8.jpeg
Zoom in to see the wiring to the plug better.
 

vanaisa

Active member
115
155
43
Location
Tallinn, Estonia
Yes, this is cold start/hi idle sensor. In my 1008 wires were also cooked, hard and brittle. I changed wires, cleaned connector and sensor works again as should.
 
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