Car runs perfect then wont run at all why :(

[nazzurro19]

Right as you all know ive had some issues with my car, 1 min was running perfectly then not running at all

well tonight i changed the fuel filter and used a tiny spray of easy start

heres inside the filter - no metal what so ever

car went like this

http://i256.photobucket.com/albums/hh181/nazzurro19/20130828_175636_zpsbe93b114.mp4

kicked in to life idles and ran perfectly on its own for a good 15/20 mins - then i decided to test the injectors as i heard by unplugging the injectors you can tell if they work by listening to the engine noise so i did and this is the results

http://i256.photobucket.com/albums/hh181/nazzurro19/20130828_180652_zpsd8fd94db.mp4

every injector made the engine run lumpy, which i presume means every injector is working?

so after an hour i went to start the car and it kicked into life instantly and revs runs fine - the dash warning light was on then i remembered i still had the 2 sensors to the airbox unplugged... I plugged it back in and the warning lights went

http://i256.photobucket.com/albums/hh181/nazzurro19/20130828_180844_zpse5af43d6.mp4

the car i thought was back to life..... Untill just now i went out its been about 2 hours and the same issue is back wont start, any ideas why guys? Before i let it go to sale

 

[Thrill]

Take it to a garage before getting rid.. could be anything. Thats like cutting your leg off because youve bruised it.

 

[nazzurro19]

Problem is i have no money as i only recently forked out buying the actual car

so i cant afford the charges at a garage

 

[Thrill]

Fair enough.. maybe a diagnostic session will put you in the right direction? Changed air filter? Plugs? Coil pack?

 

[nazzurro19]

I had it diagnosed as low fuel pressure

its had new tdc sensor and fuel filter

​no coilpacks as its a diesel

 

[Dr HMS Derv Destroyer]

Its diesel thrill

Glow plugs on them
no crappy sparks or coil packs

 

[Thrill]

Sorry, err... throttle body?

 

[nazzurro19]

Egr valve ?

 

[Dr HMS Derv Destroyer]

No throttle body on DCI's either. They have an EGR and a mass airflow sensor ( plus boost map sensor )

not as easy to fix as a petrol , it's always the fecking fuel systems on these that go and it's a guessing game which bit. Fault codes say one thing and it'll be something else

 

[barnesautos]

Sounds to me you have weak fuel pressure (hot) 2 hrs cool down.
Cold it will be fine starting right ?
Diesel injectors fail causing inadequate tolerances for precision pressure. When the injectors internally leak off high amounts of Derv in the return lines back to the tank - the fuel pressure for firing is significantly lower and firing up will not occur.
At the time of not starting (after 2 hours being left) use a little easy start to help it start via the air intake , not to much or it will cause damage , a fine spray while cranking should do the trick.
See if this helps
Let us all know how you get on
What's the mileage on the motor ?

 

[nazzurro19]

Yeah it starts dirst crank when ever using easy start bud

​mileage is 106k

 

[barnesautos]

There is a little kit that you can plug in to each injector and measure the amount of fuel being returned . If its excessive , that injector is knackered. And it only takes one to cause the issue you have.

 

[nazzurro19]

Done a leak test and none of them showed any leakage

every injector when disconnected makes the engine go lumpy and sound like its going to stall so there all working and spraying correctly

 

[barnesautos]

You need to get the Renault Diagnostic tool on it and read off the fuel pressure, I'd still suspect the injectors as a high probability

 

[nazzurro19]

Its ok sold the car now given up on it even if i fixed it i wouldnt of dare drove it far incase it wouldnt start again