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Toyota Avalon Fuel and Fuel System Questions



  • abfischabfisch Posts: 591

    Thanks. That is what I was going to do, but wanted a second unbiased opinion. For that amount of money, I am just going to get it all done. This is not going to be done by me. I just don't have the knowledge to do this without taking a week to figure it out via the service manual and I have other fish to fry. I will get the parts and sit on them until I hit 90K.

    I did take a chance and had an Infinity Basslink put in to replace the subwoofer in the deck. The place did such an amateurish job, crapo job, I had to take the dash apart myself, fix the cable to the temp. controls re-run wires, etc. What a mess but finally got it back straight and uniform. Very painful. I would NOT do it again. The only thing that I can say this amplified subwoofer does better is when your source is a CD or tape, but radio just makes things more boomy and not tight like I like my bass to be when listening to "C" jazz. Not worth the aggrevation. Sound have at least done it myself. Oh well. No harm done now.

    PU bushing groan after 10K miles. Need lubrication every once and awhile. Some may not want to bother relubing them. Just a CON I wanted to mention about PU bushing on the sway bars. They do provide my more neutral control in cornering even at low speeds (35-40mph).

    Thanks man.

  • lazarous,
    I have an 05 limited, have just over 4k on it. It runs just fine on regular.
    I tried one tank of hi-test. It gave me the next to lowest mpg I've had on the car.
  • I recently purchased a 2003 AVALON XLS and the average fuel economy indicator only resets on fill-ups. The manual says that I can reset at any time. The dealer ( Bev Smith in Ft. Pierce, Fl) says that there is a misprint in the 2003 manual. Are they correct or just trying to blow me off?
  • I have never been able to reset my 2003 indicator except at fill ups and as far as I have been able to research the dealer is telling you the truth
  • will16will16 Posts: 21
    When the blue screen says you have 0 miles left for driving, how far has anyone gone?
  • will16
    I did 32 miles the one time I took it down that low.
  • I have a '97 Avalon XLS with 78,000 miles on it. I took the car to the dealer after a service engine light came on. His diagnosis is the carbon canister that traps gas tank fumes is leaking carbon into a two-way vacuum-actuated valve and associated tubing. The fix is $665. Does the diagnosis and cost sound reasonable. I guess I am amazed that a part with no moving pieces can fail in that length of time. Any comments or related experience out there?

    The same dealer is also telling me the rear head gasket is leaking. The replaced the front head gasket a couple of years ago. Again, seems like head gaskets should last a lot longer than 78,000 miles unless the car is hot-rodded a lot, which it isn't. Any comments?
  • Have an intermitent gasoline odor entering the passenger compartment of my 1996 Toyota Avalon. It is noticable in the engine campartment and seems to enter the interior through the vents. Have had the car checked and no gas leaks have been found and the charcoal canister has been replaced. Still have the problem. Any suggestions? Thanks. Chuck
  • abfischabfisch Posts: 591
    Have an independent qualified mechanic who cares check the lines and the tank itself. If the car has been subjected to bad weather, at 10 years old, I would suspect your nose is correct and they have just not found it yet. It is serious, and bring it to a mechanic that can give you a level and time to diagnosis it correctly.

  • I've had that done by both my mechanic and the dealer. No leaks found. My mechanic even tried disinfecting the air conditioner coils to see if it was a mold type problem.
    That didn't solve it either. Yesterday the engine light came on and I took it to the dealer who told me that it was the code for the charcoal canister. I spoke to my mechanic who told me that mine was the first charcoal canister he ever changed (he had done it in hopes that it would solve the problem) and he would be amazed if the one he put in was bad. He had ordered it from the dealer. It is still under warranty and he has ordered another one. Any opinion as to whether we're on the right track? I think I'm noticing a pattern of smelling the gas odor when the tank is less than half full. My mechanic thinks this may in fact point to the canister.
  • I recently had the carbon canister on my '97 Avalon changed by the dealer for $665. The service engine light had come on. They replaced the canister, a vacuum valve and associated hoses they say need to be changed all at once. You may have your mechanic check out the vacuum valve and hoses to ensure they are not leaking fumes. I am surprised that what is basically an adsorption bed can fail like this. Seems the emission system should be more durable and waranteed longer.
  • kg4dkfkg4dkf Posts: 1
    My 1999 Avalon's owner's manual suggests premium fuel "if you expierence knocking or if you want better performance." That's pretty much the same as requiring it to me. Lucky for me, my company pays. I got the car 6 years old but only 25k miles (grandparrents drove it to the store for years). It was knocking bad! After two tanks of premium, the knock was gone. Now, with 51k miles and 7 years old, the car outperforms my friend's 2004 Avalon with 40k miles. I guess premium fuel helps.

    That being said, I use Amoco Ultimate fuel, which is also the cleanest burning fuel around. A friend who worked in a government fuel testing lab told me he would never buy anything else regardless of what the manual calls for. The pump handle even has a plastic window in most stations so you can see that the fuel is crystal clear. If you care about your car more than about the 20 cents per gallon (that's less than a 10% premium), use Amoco Ultimate (also sold at BP stations)...
  • finfin atlantaPosts: 586
    All Avalons run fine on regular, you just lose a little engine performance. The knock sensor will prevent pre-ignition in all but the most severe cases.

    Your car apparently was driven on cheap gas and the octane rating was probably the lowest available. Lower priced fuels have less of the additive that prevents carbon buildup. ALL fuel has the minimum additive standard set by the govt.

    ANY premium fuel from a name brand will help clean the engine as it contains more cleaning additives. Amoco is one of the best. Cheap fuel is no bargain, long term, as you suggest. But mid-grade from a name brand is fine. Enjoy your Avalon, great cars...
  • oilcan2oilcan2 Posts: 120
    Did some quick math,assume $.20 gal. more for premium a
    10k mile jaunt would only cost about $65 more and this is
    with no mileage increase.
    Here in south Tx all we can get is 91 octane.
  • Here is one to look out for. My check engine light came on, brought the car to the dealer--they told me my cap was loose--BS. They cleared the code, I drove off. When I went to put gas in the car, the pump shut off, like it was full. Went to 3 gas stations, same thing. Went back to the dealer today, they said my vapor canister was plugged with spiders webs--they cleaned it out, works fine.
  • bbland2bbland2 Posts: 1
    My gas tank takes forever to fill. It clicks off continually as if it is full and sometimes the gas will come out.
  • Hi,

    I have a 2000 Avalon XLS and off late i have experienced a drop in the mileage of the car with the onset of the winter season (last 1 week). I always use premium fuel and the used to get 24-25 (Indicated on trip computer display) easily in city driving conditions, however, I am getting barely getting 20-21 now even without switching on the heater. I continue to refill from the same gas station.

    Since this is my first experience in winter here, I'm not sure if any of you guys are experiencing similar issues to mine. Any inputs / advices would be of immense help

  • I have an Avalon 2000 XLS with 120K miles. Engine light on. Car will get dead after depressing gas pedal. Gas per mile around 14 Miles/gallon. OBDII scanner gave me Oxygen sensors ( all three bad). Replaced the Oxygen sensors and reset the computer. Spent around $500.00 in the sensors and the problem continue. Put the scanner again and now is giving me oxygen sensor bank 2 bad even when replaced with a new one. Car continue shutting off the engine when gas pedal depressed. Any advice please? Affraid to go to the dealer because the high priced cost associated with these problems.Thanks for all of your advise.
  • Anyone living in the Houston, Texas area who has a good experience with a mechanic that I can trust with my Avalon? I really want to avoid the 'dealers' since they are killers and suck your budget real easy.
    If you have a good experience please share with me a name or a source that I can get in touch with.
  • I have the same problem on my 2000 Avalon. Does anyone know what the problem is?

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