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Thread: Reduced power when low on fuel?

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    Regular Member Adam's Avatar
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    Default Reduced power when low on fuel?

    Hi all,

    When I picked my new Vectra Elegance up yesterday, I noticed a distinct lack of power when compared to the test drive a couple of days earlier. However, the service light was on (garage couldn't turn it off - got a service certificatte from last week though), and I only had 20 miles worth of petrol left (in fact, it was redlined).

    I got home, turned the service light off using the instructions on this forum, and went to fill the car up with petrol. Since then, it seems to be fine. Back to full power and it flies like a beast. Does anyone know if the car limits revs or power when you're low on fuel or your service light is on?

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    Regular Member Ste's Avatar
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    Doubt it.

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    No mate, it doesn't limit the power when low on fuel. It must of been your imagination matey. Enjoy the car and don't forget pics - it's the law!

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    Regular Member Adam's Avatar
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    Quote Originally Posted by AJA View Post
    No mate, it doesn't limit the power when low on fuel. It must of been your imagination matey. Enjoy the car and don't forget pics - it's the law!
    Nah. I definitely didn't imagine it. Even with the accelerator floored, it moved off slower than any car I've ever driven (and I've had 1 litre rustbuckets!). Basically, it felt like it was trying to pull away in 4th gear.

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    Regular Member AndrewTi's Avatar
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    Maybe the fuel tank was so low, it was trying to drink the dregs and crud in the bottom of the tank, refilling it made it float to the top so burning clean fuel.

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    Regular Member Ste's Avatar
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    Filtration guys......

    There will be a strainer in the tank so no crud can be picked up. And anyway crud in modern fuel systems would be EXPENSIVE

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    Regular Member MysteryElite's Avatar
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    You sure it was the service light and not the engine management light? Sounds like you may have been in limp mode, and the reset sorted it perhaps?

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    Regular Member Adam's Avatar
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    Quote Originally Posted by MysteryElite View Post
    You sure it was the service light and not the engine management light? Sounds like you may have been in limp mode, and the reset sorted it perhaps?
    It was the spanner inside the car, which from what I've read I think is the service light. Unless I'm wrong...?

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    That sounds like the engine management light. If that was on when you were driving you were in "limp home" mode which severly limits the engine and would explain what you experienced.

    Does the light come on now when you switch on the ignition? If so there is a stored fault code. Not good that the dealer let the car out in that state, but if it has all reset OK now hopefully all will be OK.

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    Regular Member Adam's Avatar
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    Quote Originally Posted by MysteryElite View Post
    That sounds like the engine management light. If that was on when you were driving you were in "limp home" mode which severly limits the engine and would explain what you experienced.

    Does the light come on now when you switch on the ignition? If so there is a stored fault code. Not good that the dealer let the car out in that state, but if it has all reset OK now hopefully all will be OK.
    No, it seems fine now. Reset it when I got home, then went to get petrol - no probs. Dropped brother off at work - no probs. Went out for a curry - no probs. Went to work this morning - you guessed it, no probs

    Hopefully resetting the light has sorted it. Why would it have come on?

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