Poor starting.....

Hi folks,
Had an ongoing problem with my TD5 on starting from cold.
To start first thing(the rest of the day is fine),I have to floor the throttle and turn over for about 5 seconds or so,the it starts sluggishly,idles properly after about another 5 seconds,and gives off an initial cloud of whiteish smoke.
I've done this in the past:new head AMC and gasket,glow plugs,injector seals and copper washers,fuel pump in tank,airflow meter.
The car used to start immediately,but now is a bugger,but only when cold.
Thought of volts to glow plugs,but wouldn't that give me bluey/blackish smoke if plugs not working?
Could fuel pressure regulator on rear of head be low on pressure?
Car has been remapped by TD5,with de cat pipe,turbo boost chip,upped turbo boost,egr by-pass,etc.
Goes like stink when hot,no leaks,rising oil level,doesn't use water,fuel economy fine.
Just done 2500 miles to south of France and back,absolutely no problem at all,pulled our 2 tonne twin axle caravan at 65/70 brilliantly.
Sorry to go on,but you need to know as much info as I can give...

Thanks for reading.
Dunc.

Hey Up

Just had a search of the forum and found this, I hope it's not the timing though.
Hopefully it will be an injector or something of the sorts.


Stu

Originally Posted by Short fat bloke View Post
Afternoon all hope you had a good Christmas!

I got a slight problem with my 300tdi Disco, on cold start it smokes like hell (Only just moved house and very embarrising when I fill up the cul-de-sac with more smoke than a very large bonfire every morning!!) and its very lumpy, almost like its on 3 pots? But when shes warmed up theres no smoke at all, and drives fine, certainly no drop in power and no change to fuel consumtion.

Im told this could be a dripping/knackered injector as its at its worsed when left over night or all day in the carpark at work. anyone else had any similar troubles?

All the best for the new year! SFB
Over-fueling normally gives loads of black smoke just like if the air filter was blocked, or injectors were fooked but remains hot or cold.

In your case I bet its white smoke, and in this case fokal compression, timing out, "retarded", whats happening is it cant burn the fuel and hence the smoke, if its missing like fook aswel it means a cylinder cant burn the fuel and wont run. If the timings retarded it gets delivered too late and again it wont get time to burn it.

once it gets hot it makes it easier for the fuel to ignite and it gets better but odds on the power is down.

Have you put it on a diagnostic machine ?.

Any codes ?.

Del.

50 pence said:

Have you put it on a diagnostic machine ?.

Any codes ?.

Del.

Click to expand...

Good point....that's what u have to do first.......the engine management is fully covered by diagnostics.......could be the CKP sensor aswell or the new MAF supplies incorrect signal(due to air leak or air inlet restriction).......or......many things....scan it before u go further.

Thanks guys,have a diagnostic reader that previously came up with excess boost,although the boost chip kit stops the management light coming on,and going into limp mode-i haven't checked it for codes recently,though...one thought about insufficient air through airflow meter...I haven't cleaned my K&N filter for quite a while..change it for a paper one?(I read from someone else's problem that they don't filter as much as paper one anyway..)

The fact that its only doing it from " cold ", would make me think about fuel delivery !.

Could this be the FPR ?. Is it leaking at all ?.

I changed mine, but only cause it was leaking a bit.

Mine starts on the key every time.

It " struggles " to fire only after a fuel filter change, ( after priming procedure ), or if I touch anything in the fuel system. ( FPR, injector out/in, fuel lines etc ).

Del.

Hi folks,
Thanks for all replies..
In response to your reply,Del,
I had thought of fuel pressure regulator,as my next port of call.
Did a fault code read,and nothing there at all.

Dunc.