Replacing Right Fuel Sender Again
Thread Starter
Instructor
Joined: Feb 2014
Posts: 194
Likes: 1
From: Moon, VA
Replacing Right Fuel Sender Again
Hi,
I replaced the right side fuel sender back in May, and it worked properly for about 6 weeks, then it started misfunctioning, only showing 7/8 full when totally full, then popping codes once I got to 3/4 tank.
I got the correct AC-Delco part. Have any of you had this same problem reoccur? I also have been using Techron every other tank, also.
The replacement for the replacement is on order. Any thoughts/suggestions as to why this happens?
I replaced the right side fuel sender back in May, and it worked properly for about 6 weeks, then it started misfunctioning, only showing 7/8 full when totally full, then popping codes once I got to 3/4 tank.
I got the correct AC-Delco part. Have any of you had this same problem reoccur? I also have been using Techron every other tank, also.
The replacement for the replacement is on order. Any thoughts/suggestions as to why this happens?
Melting Slicks
Joined: Jan 2007
Posts: 3,021
Likes: 133
From: Conejo Valley CA
Sorry to hear about this....I don't know if this helps but I replaced both fuel sending units about 7 years ago as I too had the infamous gas gauge issue. Ever since that time, I have not put Techron directly into my fuel tank. However, I have ONLY used Chevron 91 octane and nothing else ever since.
There are two sending units and it sounds like you replaced only one. Perhaps the other one needs replacement. As noted, I replaced both of mine at the same time.
There are two sending units and it sounds like you replaced only one. Perhaps the other one needs replacement. As noted, I replaced both of mine at the same time.
Melting Slicks
Joined: Jul 2006
Posts: 2,332
Likes: 31
From: Silver Spring MD
Had one replaced several years ago but the empty gauge problem returned
Have been using Texaco gas but problem returned after a year or so.
Find a dose or two of Techron or Seafoam (one or the other) in a couple of tanks of gas cleans the sensors for about 6 months.
If it is a NEW sensor take it back as others have suggested.
After that try the 20 oz bottle of Techron or a can of Seafoam to keep the sensors working right.
Find a dose or two of Techron or Seafoam (one or the other) in a couple of tanks of gas cleans the sensors for about 6 months.
If it is a NEW sensor take it back as others have suggested.
After that try the 20 oz bottle of Techron or a can of Seafoam to keep the sensors working right.
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Haven't had any fuel sending unit problems on any of the C5s that I have owned. I do use Techron every now and then.
Sucks that you are having to go through this again so soon.
Sucks that you are having to go through this again so soon.
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Thread Starter
Instructor
Joined: Feb 2014
Posts: 194
Likes: 1
From: Moon, VA
I replaced the right side sender again today, then went for a fill up. The gauge only went to 7/8 full. If it pops a code again, I think I may replace the left side sender.
Racer
Joined: Jan 2013
Posts: 354
Likes: 3
From: Athens TX
I've read about these fuel gauge issues fairly consistently and I almost exclusively use Chevron gas stations now so that I can be sure I always have a bit of Techron in the tank. I'll never be able to say for sure that it has prevented problems, but so far so good 
Thread Starter
Instructor
Joined: Feb 2014
Posts: 194
Likes: 1
From: Moon, VA
No Chevron stations in the area, so I use either Sunoco or Shell gasoline. I am thinking about replacing the left side fuel pump/sender, but the price of the part, almost $400, makes me want to wait a little longer to see if it resolves itself. If I decide to replace it, the car needs to be pretty bone dry or I will need to have several jerry cans around to hold the gas.
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Thread Starter
Instructor
Joined: Feb 2014
Posts: 194
Likes: 1
From: Moon, VA
I just ordered a left side fuel pump assembly module. Along with AC-Delco, I also found modules from Bosch, Airtex, Carter, and other manufacturers. The Bosch module was cheapest, at $240, so I chose that. I have had good luck with Bosch over the years in my BMW, and hope it continues in my Corvette.