Mégane RS4 Trophy - fueling issue?
Discussion
After a bit of advice and help of my 2019 Mégane RS4 Trophy.
Bit of history: had the car since new and had problems with the DESS Battery like everyone else.
A couple of years ago, pulled out of my driveway, got 100ft up the road and car cut out. Attempted to restart, no joy. After a few attempts battery dead. Got it towed to Renault and was told the fuel control unit had blown. Had the FCU and fuel rail replaced under warranty.
Car had had it's fuel pump replaced under recall.
Fast forward yesterday. Car started fine and drove fine. Also fine the day befire.Driving up the road (about 10-15mins from home), slowed to about 20mph then went to pull away again and nothing. No power at all. Then car completely cut out. It kept trying to restart then Christmas lights. Engine failure, brake failure, steering failure etc. Attempted to restart a few times and nothing.
Symptoms are extremely similar to when the FCU blew last time. Unfortunately it got to a point when the battery was too flat to try anything else (including unlocking the boot which is absolutely ridiculous!!)
Recovery truck put a booster pack on, tried to start and nothing. Engine turns over but nothing happening. He also thinks it sounds like a fueling issue.
Is there anyway to test this? If it's the pump or FCU, where do we get these from and are they the same as a standard MK4 meg?
Car is now back home and on charge as can't even lock the stupid thing.
After a couple hours (just enough to keep the dash going nuts) I tried a restart and same thing. Turns over and just choked. From what I can tell, I can hear the pump priming (at least that's what I believe the humming is).
Is anyone able to help? Is there any fuses I can check or a way to test anything? Does anyone know where the FCU is and if it's the same as a standard Mégane?
Honestly losing patience with the brand. I was hoping that the age old thing of french cars having bad electrics was a thing of the past but can't believe they are still as rife. (Sorry for the rant)
Bit of history: had the car since new and had problems with the DESS Battery like everyone else.
A couple of years ago, pulled out of my driveway, got 100ft up the road and car cut out. Attempted to restart, no joy. After a few attempts battery dead. Got it towed to Renault and was told the fuel control unit had blown. Had the FCU and fuel rail replaced under warranty.
Car had had it's fuel pump replaced under recall.
Fast forward yesterday. Car started fine and drove fine. Also fine the day befire.Driving up the road (about 10-15mins from home), slowed to about 20mph then went to pull away again and nothing. No power at all. Then car completely cut out. It kept trying to restart then Christmas lights. Engine failure, brake failure, steering failure etc. Attempted to restart a few times and nothing.
Symptoms are extremely similar to when the FCU blew last time. Unfortunately it got to a point when the battery was too flat to try anything else (including unlocking the boot which is absolutely ridiculous!!)
Recovery truck put a booster pack on, tried to start and nothing. Engine turns over but nothing happening. He also thinks it sounds like a fueling issue.
Is there anyway to test this? If it's the pump or FCU, where do we get these from and are they the same as a standard MK4 meg?
Car is now back home and on charge as can't even lock the stupid thing.
After a couple hours (just enough to keep the dash going nuts) I tried a restart and same thing. Turns over and just choked. From what I can tell, I can hear the pump priming (at least that's what I believe the humming is).
Is anyone able to help? Is there any fuses I can check or a way to test anything? Does anyone know where the FCU is and if it's the same as a standard Mégane?
Honestly losing patience with the brand. I was hoping that the age old thing of french cars having bad electrics was a thing of the past but can't believe they are still as rife. (Sorry for the rant)
Cheers guys.
to answer the others who may have missed it in my first post;
Fuel pump already replaced under recall and battery not deemed at fault but did have firmware. I'm the only owner and no it's not chipped.
Some other users in the Renault sport forum are also experiencing additional failures of the fuel pump even after replacement, and Alpine have actually acknowledged this for their A110 owners worr9ngly. Some suggested giving the tank a whack helps. So I've just been out and given the tank a whack. I can only describe what I can hear as some marbles rolling after each whack.
I checked fuses yesterday and confirmed ok. Also removed the fuse for the ECM as the fault logs where showing cam position sensor failures and the car is throwing anti pollution failure (I think these are red herrings).
Anyway, tried to start the car and on the 2nd attempt car coughed into life for about 5 seconds then died again. Tried again and of course by this time the battery gave up again and threw hundreds of warnings etc
Just watched that video someone posted and it doesn't look difficult to get to the pump, but mostly tricky. My biggest prob is I'm just under full and my drive is on a slight slope so I'm guessing I couldn't do the job as it's not flat?
Oh I also took the fuel line off after and there was a dribble of fuel, but not much. Once the battery has enough juice in it I'll take that line off again and try and start it to see what sort of flow comes through... Should it be a flow or just a squirt?
And ftr, I always fill up when the light comes on or just before. It's never run dry
to answer the others who may have missed it in my first post;
Fuel pump already replaced under recall and battery not deemed at fault but did have firmware. I'm the only owner and no it's not chipped.
Some other users in the Renault sport forum are also experiencing additional failures of the fuel pump even after replacement, and Alpine have actually acknowledged this for their A110 owners worr9ngly. Some suggested giving the tank a whack helps. So I've just been out and given the tank a whack. I can only describe what I can hear as some marbles rolling after each whack.
I checked fuses yesterday and confirmed ok. Also removed the fuse for the ECM as the fault logs where showing cam position sensor failures and the car is throwing anti pollution failure (I think these are red herrings).
Anyway, tried to start the car and on the 2nd attempt car coughed into life for about 5 seconds then died again. Tried again and of course by this time the battery gave up again and threw hundreds of warnings etc
Just watched that video someone posted and it doesn't look difficult to get to the pump, but mostly tricky. My biggest prob is I'm just under full and my drive is on a slight slope so I'm guessing I couldn't do the job as it's not flat?
Oh I also took the fuel line off after and there was a dribble of fuel, but not much. Once the battery has enough juice in it I'll take that line off again and try and start it to see what sort of flow comes through... Should it be a flow or just a squirt?
And ftr, I always fill up when the light comes on or just before. It's never run dry
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