Two thousand eleven prius, I think the fuel pump maybe going need some advice

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by bobby515, Jun 23, 2025 at 3:34 PM.

  1. bobby515

    bobby515 Member

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    Thank you
     
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  2. bobby515

    bobby515 Member

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    Your online manuals and info is the best. I thank you for that.
     
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  3. Tombukt2

    Tombukt2 Senior Member

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    You can replace the o-ring on the top of the tank behind the knockoff wheel or whatever I reg re use no problems . If I have it I ll put . the plastics snap off as fast as I type this no shop time .
     
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  4. Tombukt2

    Tombukt2 Senior Member

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    I also get easily 300K in changeable pump toyoda's . So it's rare for me to really change one of my own .
     
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  5. PriusCamper

    PriusCamper Senior Member

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    Most important number is "voltage difference" during high amp loads from hard acceleration and hard braking, especially when going down a steep hill. Those numbers will show how soon pack will fail better than any other numbers. Please have a passenger help you obtain those screenshots while you're driving. Or DIY it if you think you certain you do it safely.
     
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  6. bobby515

    bobby515 Member

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    Great advice, on Friday the 75 out much colder.. No problem. I think you're right.
    I called Battery Place. Hoping they will test it, and I think you're correct about the heat and the battery...it was brought the only way I could afford..rebuilt...1 year warranty..up 7/31.
    I got a simple plan as well. Because it's really old hi miles car 232k.
    , replace the fuel pump anyway. I still smell sulfur on heavy takeoff on the highway. I will pay the $100 labor and get that aftermarket cat. Installed anyway.
    Even yesterday, my MPG was poor. When it's nice out, it always gets a lot better.(cooler)
    On this car. Gas mpg was never great unless I worked burbs.
    Bringing the battery to my attention was a great idea...if I had to guess, I think now the battery could be weak under heavy use only.
    I do Uber in the city. Thank you..
    Hopefully, the battery guy calls me back Monday and I can get a replacement.
    I don't go down steep hills. So I accelerate heavy and hard braking with Dr. Pruis app. screenshot the #'s. I will try that..
     
  7. Tombukt2

    Tombukt2 Senior Member

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    Just be careful with the logic with this model it'll leave ya carless or not driving very quickly . And not being capable financially or mechanically you can get taken really quickly with these models of Prius . If you've got the above enough masse no worries .
     
  8. bobby515

    bobby515 Member

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    kinda confused on this..explai
     
  9. Tombukt2

    Tombukt2 Senior Member

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    If you've read all the post about the generation 3 you'll either get it or you don't if you can't work on your car and do things this model can get costly quickly . Twas such an issue folks opened shops to deal with the issue . Lotta weirdness seemingly . I been w Toyoda 46 or so years in not having any of it . Oh what a feeling died in 85 or so . Really died in 2010 forward for moi.
     
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  10. bobby515

    bobby515 Member

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    I understand I'm very handy, like, say, I needed an inverter. If I take it to a shop, any inverter's 250 for a good used one. They're gonna charge me 400 for the inverter and 400 for the laborer. I could do that all myself. My hardest part is diagnosing certain things. Like a fuel pump, I really don't think it's bad I think it's got something to do with my battery, but it's okay to buy a fuel pump as long as they don't get an effective one. It's defective one, the same thing with my converter. I definitely feel there's a clog in it. I smell rotten eggs might accelerate heavy on the highway. I bought an aftermarket one shop told me because they had the lift it needs to be welded one hundred dollars install, they don't think my old one's bad.They had it on the lift. But in a couple weeks, I want to haven't put the new one on anyway. I'd like to keep the car for another 70000 miles.
    Thanks for your help
     
  11. bobby515

    bobby515 Member

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    Basic fuel pump question. How low should the gas level be to replace the pump.
     
  12. Tombukt2

    Tombukt2 Senior Member

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    As long as you could possibly get it but that's tricky in the Prius I can siphon thru open top in a couple min. Then you mostly empty . I like almost empty but I've put em in close to fullsame amount of time but you're touching gas easier. That makes a lot of new folks real nervous for someone my age not so much. I've never worn gloves in 59 yrs in expecting my hands to fall off any minute . Sooo far not even arthritis. Knock on welp maybe not.
     
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  13. bobby515

    bobby515 Member

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    I'll kill the batteries and the circuit breaker. I'm not worried about the guests. I'm more worried about filling my house up with fumes. I bought the whole assembly. It comes real soon. I'm not afraid I'm getting gas on my hands, but I'm at a little less than a 1/2 a tank. Now, I think I want to run it down to maybe like a quarter. I think I need something with the the high bread in this city. I'm getting 34 miles to a gallon now. It's not doing the symptoms, it was doing earlier. My battery's about halfway, it's not raining to dead. It's eighty two degrees.I've been driving this car hard 2 years this is why I don't mind putting the fuel pump on it. Of course, maybe it'll keep a further future failure, but also I have that converter. I want to put in once. I get the battery looked at. Early this week from the place I bought this one. I'm probably going to put a set of fuel injectors in it news park plugs. I have new coils, but I want to make sure I buy the right dense co. Coils and not from eBay or Amazon, but it's kind of strange I'm in the middle of city of Philadelphia. The mileage tanks on certain days to about 34, and then when I go down to the beach area where the car breathes better. I could get 40 plus average, but never in the city only on like, really cool days and rainy days and just different days. I drive in the power mode. All the time, but the thing is, the car usually runs. Decent, all the time, so I don't have a problem with demolits. I'm having that weird problem. When the car sits, it runs like it's restricted like a clogged converter. A lack of fuel because of miss fire or backfire and there's no codes, so take it one step at a time. It's fuel pump, no big deal. Take the place back to the the muffler shop pay on a box.Let me install my new converter. See, if the fuel pump helps and then see if the exhaust helps a little bit
    And then maybe the battery they'll swap it for a new one. Then I'll know a lot more. It's a good car, though. Whatever problem I'm having is not a major problem. It's just a different problem.Thanks for your help.
     
  14. Tombukt2

    Tombukt2 Senior Member

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    As you can tell I had lots of trouble with two generation threes such is life I've never gotten over 44 in 2z in any iteration of it in many model cars. I'm in center NC Usa. So I've go varied temps and altitudes in this state. In the ten Prius I've personally owned here this is typical mileage for the two models or series we've driven Gen 2 and 3. Cars all of em have no lights or codes . Wen do its p0420 catalyst . Which I do. Not have to have here in my county. . Mileage is always in these ranges 41 to 44 mpg me and vehicle in service mode in a tech running service calls . So can be tools and equipment. In car. To 37 if in towing my plastic aluminum trailer . These mileages are like clockwork across now 4 gen2 the 3 are all dead some Arab buddies are tryna resurrect them.