sp33der

sp33der

New Member
Hey, had our Discovery 300tdi a week now and due to unusual circumstances, have driven near 500 miles in it. Hasn't used any oil, running nice as far as I know but I notice that when I start it, especially after a short stop, it puffs out a cloud of black smoke, fairly brief but very noticeable! It's done circa 140k, fully serviced and I wonder if that smokiness is anything to be concerned about? Doesn't smoke when driving and I'm thinking black smoke is diesel rather than oil....I think...yes?
 
sp33der said:
Hey, had our Discovery 300tdi a week now and due to unusual circumstances, have driven near 500 miles in it. Hasn't used any oil, running nice as far as I know but I notice that when I start it, especially after a short stop, it puffs out a cloud of black smoke, fairly brief but very noticeable! It's done circa 140k, fully serviced and I wonder if that smokiness is anything to be concerned about? Doesn't smoke when driving and I'm thinking black smoke is diesel rather than oil....I think...yes?
Click to expand...

Black smoke is fuel, and it's not uncommon for diesels to puff out a bit on start up, however it sounds like your injectors might be leaking off into the cylinders and the smoke everytime you leave it for a short time is the fuel laying in the cylinders burning off.

Might be an idea to get them tested.
 
Could be mucky injectors. Try some additive such as Millers in the tank, that's your first step, worked fo me loads of times.
 
also check that all of the glowplugs are working, starting with minimal use of the plugs tends to result in slightly more unburnt fuel being given off
 
It may be the glow plugs but put a meter between all of them and check if any are dead ( Seen thread on here before how to check if working), mine was ok , checked and re checked and puffed more smoke than Amy Winehouse for 5 years but no probs ever even on cold winter days.
 
Ciaran666 said:
It may be the glow plugs but put a meter between all of them and check if any are dead ( Seen thread on here before how to check if working), mine was ok , checked and re checked and puffed more smoke than Amy Winehouse for 5 years but no probs ever even on cold winter days.
Click to expand...

"put a meter between them all " ?

if you need to check the plugs unscrew them one at a time and while holding the tip that came out of the engine apply a high current 12v supply to them

if you say ouch within 5 seconds of applying the voltage they are working
 
Cabbie said:
Could be mucky injectors. Try some additive such as Millers in the tank, that's your first step, worked fo me loads of times.
Click to expand...

Yep good idea and wont do it any harm, it will clean the system out, but dont leave it too long, if it is the injectors it washes the bores and can cause a build up of carbon on the pistons resulting in thermal cracking.
 
sp33der said:
Hey, had our Discovery 300tdi a week now and due to unusual circumstances, have driven near 500 miles in it. Hasn't used any oil, running nice as far as I know but I notice that when I start it, especially after a short stop, it puffs out a cloud of black smoke, fairly brief but very noticeable! It's done circa 140k, fully serviced and I wonder if that smokiness is anything to be concerned about? Doesn't smoke when driving and I'm thinking black smoke is diesel rather than oil....I think...yes?
Click to expand...

If in doubt, put a new airfilter in - they only cost about £3.50+vat so why wouldn't you??

Paddock Spares - Land Rover, Range Rover Parts & Accessories - Discovery, Defender and Freelander

Cheers
Dave
 
My 200 tdi and mi amigo's 300 tdi both give a little black puff when started hot or cold. Both cars in perfect condition and it seems to be the norm with older Discoveries.

It was once mentioned that this is the price of not having complex electronics controlling the fuel..........suits me!

regards

Dave
 
Sean said:
"put a meter between them all " ?

if you need to check the plugs unscrew them one at a time and while holding the tip that came out of the engine apply a high current 12v supply to them

if you say ouch within 5 seconds of applying the voltage they are working
Click to expand...

Oooh heir Sean I like it, have you tried linkin them all togever around yer testicals, and at the same time dip yer willie in battery acid. Get the wife ter whip yer with some twin core aswel.
 
david451 said:
Oooh heir Sean I like it, have you tried linkin them all togever around yer testicals, and at the same time dip yer willie in battery acid. Get the wife ter whip yer with some twin core aswel.
Click to expand...

ermm no not today

but it has only just gone 11am so who knows
 
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