Fuel injection system temperature switch
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Senior User
Joined: Dec 2007
Posts: 108
Likes: 2
From: Colorado Springs, CO
Fuel injection system temperature switch
Hi everybody, on to the next problem! 
(I'm laughing to keep from crying)
I need to replace the sending unit / switch that is in the right front cylinder head. Ford calls this part the "switch, fuel injection system temp." Part # E3TZ - 9E939 - A and International calls it part # 1803082C2.
Long story short, I can't find a replacement anywhere. Ford shows 0 on their national parts web, international truck dealers stopped stocking it, I have been able to find one, in Texas! (I'm in California, btw)
It would seem that this might be an important controller to have, since it is part of the GP harness and ignition system. Has anyone else had to replace this? What did you replace it with? If I can't find a replacement, what should I do with that portion of the ignition circut? thanx
(I'm laughing to keep from crying)I need to replace the sending unit / switch that is in the right front cylinder head. Ford calls this part the "switch, fuel injection system temp." Part # E3TZ - 9E939 - A and International calls it part # 1803082C2.
Long story short, I can't find a replacement anywhere. Ford shows 0 on their national parts web, international truck dealers stopped stocking it, I have been able to find one, in Texas! (I'm in California, btw)
It would seem that this might be an important controller to have, since it is part of the GP harness and ignition system. Has anyone else had to replace this? What did you replace it with? If I can't find a replacement, what should I do with that portion of the ignition circut? thanx
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
The engine temp switch is known as:
E8TZ9E939A $48.00 sell $36.00
SWITCH FUEL INJ SYS
That is the switch that allows power to the fast idle and timing advance until the engine rises to 112*F then is opens and shuts off power........ You could use a wire and switch to operate it temporarily..... just use spade terminals in each of the connector holes wired through a switch...... run with it on until the engine "warms" or you drive away.
Online dealers might have a listing, but the ones I frequent don't show it now.
HOWEVER THE DIRECTFORDPARTS SPONSOR ON THE LEFT SHOWS IT BY PART # Give him a chance......
E8TZ9E939A $49.13 $0.00 $26.05
E8TZ9E939A $48.00 sell $36.00
SWITCH FUEL INJ SYS
That is the switch that allows power to the fast idle and timing advance until the engine rises to 112*F then is opens and shuts off power........ You could use a wire and switch to operate it temporarily..... just use spade terminals in each of the connector holes wired through a switch...... run with it on until the engine "warms" or you drive away.
Online dealers might have a listing, but the ones I frequent don't show it now.
HOWEVER THE DIRECTFORDPARTS SPONSOR ON THE LEFT SHOWS IT BY PART # Give him a chance......
E8TZ9E939A $49.13 $0.00 $26.05
Thread Starter
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Senior User
Joined: Dec 2007
Posts: 108
Likes: 2
From: Colorado Springs, CO
Thanx, one mystery down, next mystery. When hooking the harness up to it, which end is which? One terminal looks copper colored, the other is silverish. Is it possible to hook this up wrong?
New User
Joined: Nov 2005
Posts: 19
Likes: 0
From: Northern, NH
Could this switch be the reason my truck won't start ?
Glowplugs stay on the right amount of time, it starts when it's been plugged in so I don't think it's fuel.
I've read almost every thread about starting problems in this forum ......
Thanks
1990 F350 clubcab dually. rust free 120k miles
Glowplugs stay on the right amount of time, it starts when it's been plugged in so I don't think it's fuel.
I've read almost every thread about starting problems in this forum ......
Thanks
1990 F350 clubcab dually. rust free 120k miles
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
It could be part of the problem....... turn your key on engine off (KOEO)... press the fuel pedal does the fast idle solenoid set........is it adjusted to right RPM warm engine 850+/- 50. You can also check all IP connectors (3) for power .....KOEO.
Thread Starter
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Senior User
Joined: Dec 2007
Posts: 108
Likes: 2
From: Colorado Springs, CO
Is there a way to bypass, jump the wiring to make this work? It would seem to me that a jumper wire from one female plug to the other on the harness connection would work the same as the cold start switch. If so, sprucebunny, you might try a jumper wire as part of your trouble-shooting. If that is a bad idea, one of the other posting members will quickly tell us!
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Posting Guru
Joined: Sep 2007
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From: Las vegas
You can jump all the swich does is conect the two under 112*. I would run wire from each end into the cab to a togle swich untill you can get the swich
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Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
How easy is it to start a gasser with no choke or fast idle set..........hard and it usually won't run either. What your doing without fast idle and timing advance is the same.....
The louder engine noise is the result of timing advance...... ie a slightly advanced fuel injection timing 1-3*.... the fast idle allows a better running rpm and faster engine heating.
The louder engine noise is the result of timing advance...... ie a slightly advanced fuel injection timing 1-3*.... the fast idle allows a better running rpm and faster engine heating.
New User
Joined: Nov 2005
Posts: 19
Likes: 0
From: Northern, NH
Thanks for the advice, guys.
I don't think it's that switch after all. When it does start, it kicks down after a while.
I had the fuel return lines replaced TWICE last summer and they are leaking again, so it must be a combination of things.
At least I got it moved out of it's (muddy) winter parking spot to where i can fiddle with it.
I don't think it's that switch after all. When it does start, it kicks down after a while.
I had the fuel return lines replaced TWICE last summer and they are leaking again, so it must be a combination of things.
At least I got it moved out of it's (muddy) winter parking spot to where i can fiddle with it.
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