Renault scenic dynamique 2004 - No fuel getting to the engine? - lee mitchell

Hi Hoping someone can help me as I haven't had much luck with searching through the forum or the net.

My scenic dynamique 2004 won't start when I push the key card in and press the start button it sounds like it wants to start but nothing happens.
I changed the ignition coils and sparks plugs after a mechanic told me they were the problem but still it won't switch on! Also noticed while testing a few other parts that no fuel was getting to the engine it was dry as a bone!
After hours of searching the internet I am thinking it is maybe the fuel pump relay or the crank sensor.
I have cleaned the crank sensor which didn't work but I did notice it looks slight worn down so will buy another.

The problem I have is I can't locate the fuel pump relay I don't have a owners manual or Haynes book and can't find any info online either. I have tried to buy a replacement at my local auto centre but been told I need to remove the old relay for the part number.

Do you guys think it could be the fuel pump relay and if so where will I find it? Not very mechanically minded so easy instructions would be best! Ta
Renault scenic dynamique 2004 - No fuel getting to the engine? - elekie&a/c doctor

Either you keep throwing parts at it until it is fixed,or find a mechanic that has some knowledge of test procedures and how the system operates.

Renault scenic dynamique 2004 - No fuel getting to the engine? - lee mitchell
To be honest I've spent so much money on it with different mechanics telling me it's one thing or another then it not solving my problem that id rather give it a shot at fixing it myself before scraping it!

Can anyone help with the location of the fuel pump relay?
Renault scenic dynamique 2004 - No fuel getting to the engine? - elekie&a/c doctor

The fuel pump relay is integrated into the engine bay fuse box and is not a replaceable part,other than another fuse box.Very much doubt if that is the problem.

Renault scenic dynamique 2004 - No fuel getting to the engine? - lee mitchell
Any ideas what it might be?

Renault scenic dynamique 2004 - No fuel getting to the engine? - The-Mechanic

I'd be inclined to start by checking if there is power at the fuel pump first. If you're lucky, you may have a cover or grommet under the rear seat to access the wiring and check there is voltage there. There may be four wires going into the tank unit ? Use a voltmeter on the two larger diameter wires as these will be the power supply ( the thinner ones will be the fuel gauge sender ). If there's battery voltage there whilst cranking the engine, the in tank pump will have gone.

If there's no voltage, you'll need to check for a blown fuse or damaged / corroded connections or wiring. A wiring diagram will be required for a full diagnosis, or enlist the services of an auto electrician who is familiar with the system if you don't feel up to the task.

It could be that the crank sensor has failed as this'll cause the pump not to run. To find out you'll need to check for an RPM signal using diagnostic equipment and see if you get a signal when cranking.

Renault scenic dynamique 2004 - No fuel getting to the engine? - lee mitchell
Hi thanks for the great reply
I tested the fuel pump with a voltmeter it was showing some voltage but only 2/3 volts?
Any idea what this means?
I was expecting it to either be working or not.
Renault scenic dynamique 2004 - No fuel getting to the engine? - Gibbo_Wirral

Dirty / loose / corroded power connections?

Renault scenic dynamique 2004 - No fuel getting to the engine? - dieselnut

Are you sure you have the correct wire.

If it's a combined pump/ level guage you may be measuring voltage on the wrong wire.

If your'e sure you have the correct wire you could run a temporary wire direct from the battery positive & see if it runs.

Renault scenic dynamique 2004 - No fuel getting to the engine? - The-Mechanic

Like dieselnut said, it seems you tested the gauge sender not the power supply ?

How many wires are in the harness connector, 2 or 4 ? If there's only 2 then there must be another connection for the pump ( unusual as the pump / gauge usually is one unit ) or you do indeed have a high resistance in the circuit if it is the power supply ?

Re check and report back on what you find.

Renault scenic dynamique 2004 - No fuel getting to the engine? - lee mitchell
Hi sorry I've been a while for a while.
Since my last update I've changed the fuel pump relay and the crank sensor the car started fine drove for a few miles I stopped the car when I came back half hour later the car wouldn't start again.
There is no voltage at all to the fuel pump now.
I have noticed the immobiliser light flashes when I first get in the car but after I've tried to start the engine the immobiliser light stays on solid?
I haven't noticed if it normally does this when driving fine?
 

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