noise from fuel tank
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Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, noise from fuel tank in Cadillac SRX Forums; Alright, my wife just got back from her trip cross country to Arizona. While she was there, she said that ...
  1. #1
    Mr. Mohr's Avatar
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    noise from fuel tank

    Alright, my wife just got back from her trip cross country to Arizona. While she was there, she said that she noticed a "puffing" sound coming out of the fuel tank while it is running and the fuel cap is off. I told her to stop fueling up with the car on so she doesn't hear it anymore. (simple fix, right?) Now she's home, and swears it never made noise when she did it before. Any ideas as to the real cause?

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    glake89's Avatar
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    Re: noise from fuel tank

    My SWAG is the higher temperatures in AZ caused a rapid expansion of fuel as it was being put into the tank, causing a slight blowback.
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    repnatl is offline Cadillac Owners Enthusiast
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    Your actually not suppose to fuel any vehicle up with the engine running it is VERY unsafe.

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    Mr. Mohr's Avatar
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    Possibly unrelated, but it also started studdering while cruising at city speeds if I give it slight throttle. Kind of makes a lower exhaust note, and sputters slightly.

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    repnatl is offline Cadillac Owners Enthusiast
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    Check engine light on or flashing?

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    Mr. Mohr's Avatar
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    That's the funny thing, no CEL. The stumbling feeling isn't severe, and most might not even notice. When a plug of mine was on its way out, I noticed way before it missed bad enough to trip my CEL and tell me I had a bad #6 plug.

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    repnatl is offline Cadillac Owners Enthusiast
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    I'm having the same issue lol. At idle it has a very very slight skip nobody else notices but no other noticeable issues.

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    Mr. Mohr's Avatar
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    My wife actually noticed just now. While driving under 40mph, I give it slight throttle, it mares a low exhaust sound (like its being bogged down), if I let off the throttle at all it goes away, if I give it more throttle it down shifts and all is good. My gut feeling is fuel filter or clogged objectors. Maybe she git some bad fuel on her trip. She also ran regular unleaded most the way instead of plus or premium, if that makes a difference.

  10. #9
    SFVetteman's Avatar
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    Re: noise from fuel tank

    Short of throwing parts at it or waiting for a CEL, you need a scanner that can read real-time data to isolate the cause. The use of regular should not cause a problem because if the PCM detects low octane fuel being used, it switches to a low octane fuel table until it detects higher octane fuel being used again.

    Bill

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    Re: noise from fuel tank

    Right...it will regard the timing and give you a bit less performance...those in tune with their vehicles can usually tell...it might manifest itself with a shudder...but I'd put my money on something like you mentioned...dirty gas, fuel filter, perhaps dirty injectors but that seems unlikely with today's gasoline...especially if you fill with Top Tier brands which don't have to be the most expensive...good luck with your diagnosis...

    Bill

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    repnatl is offline Cadillac Owners Enthusiast
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    Aren't these designed to run on 87? That's what it says on my fuel door just curious if it is different for the v8 owners the v6 doesn't run any differently for me no matter what octane I use as long as I don't get gas on post ( military) as that is usually watered down.

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    Re: noise from fuel tank

    I thought the Northstar V8 used 91 recommended...our V6s can use 87 without issue...

    Bill

  14. #13
    Mr. Mohr's Avatar
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    Repnatl, where are you stationed? I'm in DC. I haven't noticed anything wrong with the fuel here. We usually fill up at well known stations, but traveling cross country, sometimes you gotta stop at some sketchy places...

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    repnatl is offline Cadillac Owners Enthusiast
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    Quote Originally Posted by Mr. Mohr View Post
    Repnatl, where are you stationed? I'm in DC. I haven't noticed anything wrong with the fuel here. We usually fill up at well known stations, but traveling cross country, sometimes you gotta stop at some sketchy places...
    Im retired out of ft. Hood "welcome to the great place" lol. The gas at the aeefes here is known to be watered down and its the same price as off post.

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    Mr. Mohr's Avatar
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    Just replaced my fuel filter, thank God its not in the tank. Also running STP fuel objectors cleaner through a tank of 93.

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