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Old 04-21-2008, 08:05 PM   #1 (permalink)
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temp sender

Can some please help me out? I have a 93 22re; A short while ago I had a problem with my temp guage going immeadiately to red after starting. Soon after it just stopped working. Today I changed my temp sender and noticed that its began doing the same thing. Also it would blow the EFI fuse everytime it went to red . I thought previously that there was a break in my o2 sensor line/harness as to why the EFI fuse would blow. But now it seems that its from the temp sender, what is the relationship of the temp sender and the EFI fuse? Please, I'm opened to all and and any suggestions.

Last edited by caf325; 04-21-2008 at 09:15 PM. Reason: forgot truck spec
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Old 04-21-2008, 09:24 PM   #2 (permalink)
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temp sender

Anyone???????????
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Old 04-22-2008, 06:35 AM   #3 (permalink)
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Old 04-22-2008, 11:08 AM   #4 (permalink)
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Quote:
Originally Posted by caf325 View Post
Anyone???????????
The temp gauge sending unit and the EFI ECM temp sensors are completely different, so there's really no connection between the two.

A bad temp gauge/sender should not affect the EFI fuse.
The power for the cluster guages is via the Engine fuse.
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Old 04-22-2008, 11:22 AM   #5 (permalink)
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I kinda felt that but I'm curious as to why the EFI all of sudden began blowing fuses again after I changed the temp sender and the guage began to function again. Could the temp sensor be the problem?
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Old 04-22-2008, 09:04 PM   #6 (permalink)
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I can't think why the EFI fuse would start blowing, but there's probably many possibilities.
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Old 04-22-2008, 10:04 PM   #7 (permalink)
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temp sender

Well here is an update, I unplugged the o2 sensor and plugged the temp sender and after about 5 minutes of idling the efi fuse blew. However when I unplugged the temp sender I was able to drive it several miles with no problem. I did notice that the temp sender wire had a bad spot along with copper showing right at the harness.
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Old 04-24-2008, 04:08 PM   #8 (permalink)
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temp sender

I found the problem!!!!!!!!!!!! It was the group of wires ( temp sender, cold start, fuel injectors wires) that rest as a bundle on top of the fuel rail. The underside of the bundle of wires had begun rubbing through the insulation. WHEW!!!!!!!!!!!!! Thanks to all that offered suggestions.
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Old 04-24-2008, 09:55 PM   #9 (permalink)
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Great, glad you found the problem.
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Old 04-25-2008, 09:23 PM   #10 (permalink)
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caf325, Could you somehow post a picture of exactly where the wires are rubbing. That might be something other people would want check out to keep the same thing from happening to them. Just a thought :0 Rickisan
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