Apologies if this has been answered elsewhere, but I couldn't find an answer using the search button, even though it looks like there are a few others with similar problems...
The car is a 2007 Renault Grand Scenic 1.6 Dynamique (if that's how you spell it..). And it's the 1.6 Petrol engine.
The problem...
Basically, as the fuel gets low (just above 1/2 a tank), it starts to feel a bit powerless and the engine starts cutting out under power. Starting the engine (both hot and cold) sometimes requires two pushes of the button, and it will sometimes cut out straight after starting unless a dab of throttle is applied it usually settles down after that.
The main issue is the cutting out under power. This gets progressively worse as the fuel gets lower. In the worst cases, it feels as if the speed limiter has kicked in - there's no power whatsoever. The car drives OK with gentle throttle usage, but pulling away from junctions, driving up hills or fast roads all become 'interesting'.
Our local garage had their auto electrician look it over and first thing they found was a faulty dephaser unit, which was replaced. Apart from a fault with the electronic handbrake switch (also replaced), no faults were logged by the ECU.
The reported MPG has also got a fair bit worse.
Our local Renault main dealer also had a good look (Bristol Street Motors in Derby) and couldn't find the root of the fault (the garage was very good - they didn't charge for the diagnostic as they couldn't find the fault!).
Has anyone any suggestions? My thoughts were is there something amiss with the fuel pump, but I can't find much info on the location of fuses/fuel pump relay/etc.
I keep seeing references to the crank sensor, but as it gets worse as the fuel gets low, it seemed a very long shot.
Any thoughts?
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Loss of power when fuel is low - Help!!!!
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