Low fuel light?
10-14-2009, 06:43 PM
#1
Registered User
Thread Starter
Join Date: Jan 2009
Location: knoxville,tn
Posts: 75
Likes: 0
Received 0 Likes
on
0 Posts
Low fuel light?
You know i just noticed the other day that my low fuel light doesnt work....in fact i dont think that its been low enough but i let it get in the red and it doesnt come on...95' Taco 3.4 any sugg,be great thanks
10-14-2009, 07:00 PM
#2
Registered User
Join Date: Sep 2009
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
I'm beginning to wonder if my light works also. My last fillup, the gauge was on E for awhile but I filled up with less than 15 gallons. I believe (?) that we have a 21 gallon tank so I think maybe this gauge is just biased. I am on E again, this time I am going to push it (maybe I should fillup a 5 gallon gas can on the way to work tomorrow just in case).
I have a 96 ext cab, 3.4L auto, 4wd, btw.
I have a 96 ext cab, 3.4L auto, 4wd, btw.
10-14-2009, 07:35 PM
#6
Contributing Member
Join Date: Jan 2003
Posts: 10,916
Likes: 0
Received 0 Likes
on
0 Posts
The fuel sending unit is a known issue on the 5VZFE powertrain/fuel monitoring system (mainly earlier versions). When I removed the stock fuel pump for the Walbro 190 pump, I looked for obvious signs of an issue and I noticed that the float arm moved a metal tab past a series of contacts. Some of the contacts were black. I could not get the black off, but I did make them a little better by using an eraser. The contacts that were black were in the same range I was (and still am) having issues with. My issue, by the way, is that the fuel gauge goes down extremely fast between F and 1/2 a tank, then slows down significantly. The low fuel light comes on when I have 4+ gallons left. Seems like you may have the opposite problem.
Trending Topics
10-14-2009, 08:08 PM
#8
Contributing Member
Join Date: Jan 2003
Posts: 10,916
Likes: 0
Received 0 Likes
on
0 Posts
You can test it, but you have to drop the fuel tank to do so. If you're going to go through all that trouble, you might as well replace it (the FSU). I think you can measure the resistance of the contacts if memory serves me right. There might be a TSB out for this issue.
10-14-2009, 09:01 PM
#10
Contributing Member
Join Date: Jan 2003
Posts: 10,916
Likes: 0
Received 0 Likes
on
0 Posts
You might be right about that. I guess I got a little sidetracked on the FSU fuel/gauge issue...but that's a good point. If you drop the tank you might be able to check the low fuel light part as well (I have no experience with that) as mentioned.
10-15-2009, 05:48 PM
#12
Registered User
Join Date: Dec 2008
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
The fuel sending unit is a known issue on the 5VZFE powertrain/fuel monitoring system (mainly earlier versions). When I removed the stock fuel pump for the Walbro 190 pump, I looked for obvious signs of an issue and I noticed that the float arm moved a metal tab past a series of contacts. Some of the contacts were black. I could not get the black off, but I did make them a little better by using an eraser. The contacts that were black were in the same range I was (and still am) having issues with. My issue, by the way, is that the fuel gauge goes down extremely fast between F and 1/2 a tank, then slows down significantly. The low fuel light comes on when I have 4+ gallons left. Seems like you may have the opposite problem.
10-28-2009, 10:40 AM
#18
Registered User
Join Date: Oct 2007
Location: San Antonio, TX
Posts: 797
Likes: 0
Received 0 Likes
on
0 Posts
10-28-2009, 05:33 PM
#20
Contributing Member
Join Date: Apr 2008
Location: Alabama
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
you all need new fuel sending units...they wear out and get coroded thus not reading right or at all. Some even give you a false reading on how much gas you have.
