Join Date: Jul 2010
Location: Upstate NY
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Fuel Pump Noise
Hey everyone. My fuel pump has been making this mid to high pitched whining noise for a while now. It is just a little bit louder when the tank is around 1/2 a tank and then it makes another faint noise when I turn the key if it is 1/2 a tank or a bit lower (BUT I never let it get below 1/2 a tank (Fuel Used reading 9 gallons) unless I am trying to drive 3-3.5 hours nonstop or one stop, then I don't let it get below 11 gallons used.), but I can't really describe it. Sometimes the pump is a bit louder than usual for the first 5 seconds that the engine is running, but then the volume decreases to what it normally is.
I normally let the truck warm up for 5 minutes before I drive it, unless I am in a rush, but I still let it go for 2 minutes if I can't wait 5 min.
If I am standing next to the left side of the car, it seems louder than the engine. My gas gauge also does not work properly (I know, I know. The gauge sender is bad.). It reads around 3/4 to F until it gets around 1/2 a tank. The fuel filter was replaced with a Fram fuel filter (BEFORE I found out about their quality) in March when the car had around 88,000 miles on it (It has 93,500 now) when I had the front wheel bearings replaced. I am going to have it replaced again (with a Purolator filter) next Friday when I have 3 rusted (NOT leaking) brake lines replaced.
I am planning on having the pump assembly replaced in December, when I am off from college for the long break (and I am working part-time if possible) since I will likely have 100k on the truck by that time and I want to keep this truck for a long time with as little trouble as possible. I would have to plan any repairs very carefully during the semester because I am taking 24 credits and I would have to plan the week around a repair if it has to be done.
I also have used Lucas Deep Clean and the regular fuel injector cleaner in addition to periodic Techron treatments. The truck seems to drive fine, though. No stalling, fast startup on the first try, etc. Now here are my big questions:
1. Does this noise mean that the pump is on it's way to failing completely in the near future? Or is this a normal noise that should be expected and I should not worry about it?
2. Will changing the fuel filter cause any problems with it?
3. Is Lucas/Techron good or bad for the pump? I don't do the Lucas every tank, just every few tanks to keep the injectors clean so I don't have problems with it. I do the Techron every few months.
I hope I provided enough information to help diagnose this noise.
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