: Clio 1.5 dci (54) loss of power at 2,500rpm

13th February 2011, 08:05 PM
Hi everyone
I've just spent the last hour reading similar cases on clio owners losing power, but nothing that resembles my case. Wonder if anyone can suggest something?

I have a Clio 1.5dci, 70k miles (54 plate)
Recent oil change, new battery, glow plugs, timing belt and tensioners (done early Jan 2011) - Fuel filter changed 10k miles ago.

When driving, as I get to around 67mph and 2,500 rpm I notice a drop in power (feels like its missing one of the cylinders) and the glowplug/heater light pops on. The light goes off, if I press the clutch and take it back to low revs, but if I drive back up to the speed again - it pops on again and there is a loss of power.

I can keep driving the car no problem, but it doesn't pull nearly as well as it did before the light comes on and it takes much longer to get up to speed on the motorway.

I took it into my local diesel garage who had the car for the whole day, they were unable to repeat the experience, but I see the light everyday I use the car.. doing 70 mile round trip on the motorway.

Error codes they were seeing 1078 and 1004 and they said this was an 'unknown'

I've noticed its drinking a little bit more fuel than normal, but haven't seen any smoke.

Having spent 600 getting all the work done on it in Jan, I'm keen to try and find out the problem.

Should also note I had the EGR valve replaced about 2 years ago too.

Any help is greatly appreciated.
many thanks

13th February 2011, 08:11 PM
Hi , this one does suffer with the fuel pump breaking up and throwing swarf into the fuel system. To test this empty the contents of the fule filter into a glass jar (fuel) and use a magent into the fuel , if you pick up anything you may have a problem with the pump !:( , good luck Richard

13th February 2011, 08:22 PM
Thanks - I'm pretty sure its clean, but will check

14th February 2011, 08:58 PM
Is it a loss of power at 2500rpm in every gear or just at that speed?

I had a similar problem but it happened in every gear which turned out to be the turbo solenoid which was causing the turbo not to work properly.

150 problem solved.

Hope this helps

14th February 2011, 10:31 PM
I think its just at higher speed, did it again all the way to work and back again today. Hit the high speed, can run fine from cold for about 10 mins, then on comes light and you feel a little loss of power, as if it working harder but not going faster.


16th February 2011, 09:02 PM
I have a 2004 dci 100 and a new fuel filter resolved this issue you are explaining for me. Cut the old filter open to inspect the element inside for contamination.

Chez's Clio
31st March 2011, 12:09 AM
Hi I have Just bought a 51 plate Clio dci65 with the exact same problem,
I can hit 80mph in 4th without the light coming on but if I accelarate from 40 in 5th as soon as I reach 68mph the light comes on, I have had the car diagnotic checked today, they cleared all the fault codes and I am taking it back tommorrow for them to recheck as the light has come back on, they seem to think that it is the vehicle speed sensor in the gearbox which makes sense to me as it always happens in 5th gear at the exact same speed and regardless of the load conditions of the vehicle.

If your problem has now been cured I would appreciate it if you could let me know what the cause was,

Regards Lee

31st March 2011, 11:53 AM
I spent weeks testing my dci 100 - i had no positive results from any Renault dealer. (trust me they don't understand the system - I'm a service specialist for a global company and i was telling them what to do) The only thing they have which I don't is the Renault diagnostic equipment

I have cured my car. Note: I was getting an error code and glow plug light like your car and the fuel filter repaired this - But my power loss problem came back with no error codes. And I mean I was in third gear on the motorway - it was gutless.

It was the mass air flow sensor on my car - simply disconnect the plug and drive it. When the plug is disconnected the software goes back to default values - therefore you get max performance all the time "...it ignores the sensor as its unplugged - with no warning light is shown. (this was the problem with my engine). You will only get an error if there is an open circuit or poor reference voltage

let me know how you get on.

P.S the mass air flow sensor is the first sensor after the air cleaner/filter - just pull the plug off and drive the car to test

all the best


Chez's Clio
5th April 2011, 09:43 PM
Cheers I will give that ago when I can get the car back of the misses.


19th January 2013, 10:54 AM
Hi. Did this fix the problem? Cheers

21st January 2013, 02:36 PM
Hi cliodci65, did you manage to sort out your problem?

I have the same issue with my 2003 DCI 80. I've been searching around forums but can't seem to find a definitive answer. I've cleaned the EGR valve and checked a few other things but no joy.

As for Lawrence876s suggestion, I'm pretty sure the DCI 65/80 cars don't have a MAF sensor and that the first sensor after the air filter is the air temp sensor (grey plug on pipework where I assume the MAF is on the DCI 100)

Anyone else got any ideas?

26th January 2013, 10:28 AM
Hello peeps.

Ive been thru the wars on this myself with a 1.5 dci clio been there and done it lol.

if your glow plug light stays lit permantly its usually a worrying sign.

it doubles up as an injector fault light.

when the car loses power is it running rough and off a cylinder? i.e does the engine shake about?

also high diesel consumption and blue smoke are signs.

if the glow plug light is on get it scanned with renault clip or similar device. i livein norn iron and am able to do this if your nearby.

it will tell u which cylinder is at fault and therefore which injector.

pray its not the pump and just a lose connection to the injector folks.