Efi Relay
- Thread starter gfnelson
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NorCalDoug
problems solved daily...
Look for a wire shorting out somewhere.
On the 94 LC I used to have, I had a wire leading from my O2 sensor that had the insulation worn through. It was shorting out against the firewall which caused my EFI fuse to blow.
I'm not sure if it could be related given that mine was a 1FZE and (I assume) you're running a 3FE...but it could be...
On the 94 LC I used to have, I had a wire leading from my O2 sensor that had the insulation worn through. It was shorting out against the firewall which caused my EFI fuse to blow.
I'm not sure if it could be related given that mine was a 1FZE and (I assume) you're running a 3FE...but it could be...
The 1991/1992 models are known for having problems with the EFI relay due to a too small a guage wire running from the EFI Fuse. Many on the board have replaced this wire with a larger guage which solves the problem. I believe there may be a specific thread a ways back.
Give the search a try. If you come up empty handed, post again and I'll see what I can find.
Cheers!
-H-
Give the search a try. If you come up empty handed, post again and I'll see what I can find.
Cheers!
-H-
Here is a thread on 80sCool that discusses this (known) issue.
In summary:
=========
(Quote from Tony Rizo)
"Gregg, do it yourself, its very easy and wont cost you anything. Open the
hood look in the driver side where you will find a black fuse/relay box.
Identify the silver round relay (it will read EFI on top of the black box)
then identify the fuse right next to it that will read EFI fuse (the spade
type). Now all you have to do is remove the 2 screws from each end and lift
the platform out and you will find a wire going from the fuse to the relay,
no longer than 4-5 inches in length. Now just bridge a 10 gage wire onto it
and your done you don't even have to remove the one that's already on. Your
done. I did it to mine and it has never, ever failed."
-B-
In summary:
=========
(Quote from Tony Rizo)
"Gregg, do it yourself, its very easy and wont cost you anything. Open the
hood look in the driver side where you will find a black fuse/relay box.
Identify the silver round relay (it will read EFI on top of the black box)
then identify the fuse right next to it that will read EFI fuse (the spade
type). Now all you have to do is remove the 2 screws from each end and lift
the platform out and you will find a wire going from the fuse to the relay,
no longer than 4-5 inches in length. Now just bridge a 10 gage wire onto it
and your done you don't even have to remove the one that's already on. Your
done. I did it to mine and it has never, ever failed."
-B-
Last edited:
Hey guys, this is Sony. Sorry I haven't been on much, but we are in the process of moving, and I have also got to finish my new basement, which has a lot of work associated with that.
I was also very curious about this problem. I have been "living" with the problem for the last 2 years. In the past, it usually only manifest's itself on very hot days. Now, I'm seeing the problem much more frequently, like after a 20 minute drive. So I went to a shop, and showed him the one tech article about it. The mechanic was scratching his head, and really didn't see how that would fix this problem. He was also quoting like 2-4 hours of work to replace these two wires. From this last thread, it sounds like only one wire was being replaced, and it was a very short run that I could do myself. I may have to try this, and see if this helps the problem. There was some talk about the wire from the relay to EB1. Is that also an easy wire to get too, and run a concurrent 10 gauge wire too?
Thanks for your help.
-Sony
I was also very curious about this problem. I have been "living" with the problem for the last 2 years. In the past, it usually only manifest's itself on very hot days. Now, I'm seeing the problem much more frequently, like after a 20 minute drive. So I went to a shop, and showed him the one tech article about it. The mechanic was scratching his head, and really didn't see how that would fix this problem. He was also quoting like 2-4 hours of work to replace these two wires. From this last thread, it sounds like only one wire was being replaced, and it was a very short run that I could do myself. I may have to try this, and see if this helps the problem. There was some talk about the wire from the relay to EB1. Is that also an easy wire to get too, and run a concurrent 10 gauge wire too?
Thanks for your help.
-Sony
Yet another question about the EFI relay. I have pulled out the assembly that houses the EFI relay. I notice two things immediately that have me concerned. First, the one lead on the EFI relay assembly that is getting hot(blacken), is a wire that goes into the wiring harness, and not to the EFI fuse. This may not be important, but I was concerned about that. Another discovery on the EFI fuse that I was curious about, when I look at the bottom of the assembly where all the wires go to the fuse. I notice that the fuse only has 1 wire going into the one side, and I don't see another wire coming out of it. Maybe I'm being dense, but I would assume that the way the fuse works, it should have a wire on either end? Or maybe the wire is hidden from me. Thanks for any help people can enlighten.....
Sony
Sony
