dCi not running properly......

[Dr HMS Derv Destroyer]

hi all, just started having a problem with my dci and hoping someone can shed some light on this situation.

this is my car starting and idle

http://www.flickr.com/photos/75857206@N05/7099919381/

this one is the problem usually happens 2 minuites ofter starting.
http://www.flickr.com/photos/75857206@N05/7099988429/

often drops a cylinder when driving but only when accelerating.
switch it off, refuses to start, leave it for 5 mins, starts again then does 3 cylinder then all four, randomly,

now we have had it plugged into a clip computer before and it flagged no faults found other than my seat airbag was disconected.

help appreciated.

raz

 

[TonkaTruck]

Sounds really rough and not smooth at all.

Hope you get it sorted soon Ryan!

 

[James105]

I'm not familiar with DCI's, but was that air in the fuel line in the first video clip?

Run it low on fuel lately?

 

[Dr HMS Derv Destroyer]

i know, sounds really ticky and the engine bounces allot :/ need it fixed asap!!

 

[Dr HMS Derv Destroyer]

I'm not familiar with DCI's, but was that air in the fuel line in the first video clip?

Run it low on fuel lately?

its been like that for a while, compared it to a mates fuel lines and it looks the same when running. the very bottom clear pipe looks like it has no fuel pressure at all ?

 

[Dr HMS Derv Destroyer]

just to add, the fuel system has been bled 3 times by renault, myself and a diesel specialist which couldnt fathem it out

 

[James105]

Had the system/ injectors pressure tested to check they all balanced and giving out the same volume of fuel?

 

[Martin_172]

air in the lines is normal, although 100's have very little for some reason? is this a 65 or 80 i take it?

looks however like yours has got LOADS of air! but its been a while since i watched the lines when one was running. any leaks at the fuel filter? has it been changed lately? when was the last time the EGR was cleaned?

 

[Dr HMS Derv Destroyer]

Dci 100's have a better fuel pump aparently.
Mine an 80.

All the injectors Re brandnew and have been pressure ballanced, and the whole engine has just been rebuilt 600 miles ago.

New pump, filter, everything bar the engines internals.

Its a random fault, but the renault clip computer cant find it in the registered faults history log.

 

[James105]

Worth doing a leak down/ compression test done? Although being a bit intermittent not sure it's likely to show something, but it's a pretty cheap test that can be done to tick something else off the list of possibles.

 

[glenn_adam_doble]

all i can think is that it could be a faulty injector

 

[Martin_172]

were the injectors coded to the car?

 

[Dan519]

Were the valve clearances done properly? Sounds like a valve might not be sealing once the engine warms up. It's a long and boring job to do to get them right

 

[Dr HMS Derv Destroyer]

Injecyors are new and have been coded to my car by renault them selfs. Valve clearance was done, all the correct locking tools used. A mate said the ticking could be a fubard injector or the piston to valve timing relation. Ie, the piston is on its way upto TDC and the inlet valve s opening early, thus when the piston finally reaches tdc its trying to force thr valve back in.Its a very wierd fault. One min its pulling like a train, next its 3 cylinder tractoring.

 

[Dr HMS Derv Destroyer]

Also going to do a compression test later to see which if any cylinder is eother out of timing or leaking.

 

[Scrooge]

With regards to the air, have you cleaned the strainer out in the sender unit?

 

[Dr HMS Derv Destroyer]

Stupid question but whats a strainer unit? Some sort of MAF sensor?

 

[Scrooge]

The sender unit is the bit in the tank under the rear seat, the strainer is the filter on the bottom of it, when they get properly clogged up you suck in air.

 

[Dr HMS Derv Destroyer]

Ahh i see, i'll have a check later. If its clogged up, is it easy enough to clean out? Some engine degreaser and kettle boiled water?

 

[glenn_adam_doble]

Major ball ache to get the lock ring off the sender unit, me and my mate had to bray his round with a chisel, made a right mess of it but it was going to the scrappy anyway.

 

[Dr HMS Derv Destroyer]

Greeaaatt. Might see if my immersion tank element removal tool works. Same size as the sender unit I think.

 

[Dr HMS Derv Destroyer]

right, checked the timing and its perfect. took it out for a spin, speed up to 85 and the stop/engine symbol/ and coil light-injector fault light came on, drop bellow 80 and it goes off, no other lights on the dash, and the three cylinddr trouble has gone.

plugged it into a clip computer again and it came up with two faults,

1. DF084 EGR maximum
2. DF08* fuel pressure regulator reading maximum

 

[Scrooge]

The same fault codes both times my injectors were knackered.

 

[Dr HMS Derv Destroyer]

possibly, irrcc if an injector is faulty, it could make the ecu think the fuel rail pressure has dropped. so, ive ordered a new EGR valve from eurocarparts. and if that dont fix it, the whole fuel system is being stripped and re built from square 1.

this has just really pissed me off

 

[Dr HMS Derv Destroyer]

this pritty much sums up most of my engines idle problems and problems when running_

EGR Valve An EGR, or Exhaust Gas Recirculation valve is a means of reducing NOx (Nitrogen Oxide) emissions from your engine. The EGR valve, as its name suggests, re-circulates exhaust gases to act as a coolant in the combustion chambers.
Over time EGR valves become sticky and will eventually seize open or closed. If seized open the engine may idle poorly or even stall. If seized closed the engine will operate at increased temperatures under load and may cause "engine knock". This is especially bad for turbocharged vehicles, as the increased exhaust gas temperature can lead to premature failure of the turbocharger also.

 

[James105]

Does sound like some of the issues your having. I'm sure someone did a bit of a "how to" on cleaning out the EGR valve on here

 

[TonkaTruck]

http://www.cliodci.net/viewtopic.php?f=8&t=241

 

[Dr HMS Derv Destroyer]

Cheers tonks! Already had it off for a clean and the valve but is actaully fucked. It wont open or close.

Qlso notice abit of oil around the seal on the plastic boost pipe to top intercooler inlet thing. ( near alternator )

 

[Sash]

Were the valve clearances done properly? Sounds like a valve might not be sealing once the engine warms up. It's a long and boring job to do to get them right

This is how mine sounded when the valves didnt seat properly.

The same fault codes both times my injectors were knackered.

My brothers 65 does this - rev it hard and the injectors throw a wobbler and bring up the EML and then refuses to start after you turn it off!

 

[Dr HMS Derv Destroyer]

Im trying the EGR valve fix first. Then going down the fuel delivery system route.

Timing is almost perfect, compression check shows no differnce on any cylinder.

f**k it , i'll take the head off again and re-lap every valve and time it all up again

 

[Dr HMS Derv Destroyer]

right problem update, changed the EGR valve last night, drove to a mate that was working at renault today, he plugged it in, wiped the fault codes. started my engine up again and the DF408 EGR maximum come straight back on im stuck what to do next. cylinder trouble comes back when i give it hard acceleration through the gears, which then leads to the fuel rail pressure at maximum fault.

any ideas?

 

[NoahRobinson07]

The second video is what happened to a friend's 1.2 it was a ecu fault codes that needed clearing. I have the codes if you want them, i dont know if they'd be any help with it being a dci

 

[Dr HMS Derv Destroyer]

cheers mate. already clearwd the fault codes on a renault clip computer, but the come bacl instantly when the engine is started.

injectors are off this weekend for a clean out and health check down at diesel dynamiqs

 

[NoahRobinson07]

cheers mate. already clearwd the fault codes on a renault clip computer, but the come bacl instantly when the engine is started.

injectors are off this weekend for a clean out and health check down at diesel dynamiqs

If its not the EGR valve. I would probably say the injectors, but its good you've replace the EGR as it means you wont have the risk of failure next time