mpg help

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cat5cable1

New Member
Posts
18
Location
suffolk
hi all ok this is what i have done to my 300tdi disco, its done 170k.

new engine oil and filter
new fuel and air filter
egr mod and intercooler cleaned out and new top hose.
new glow plugs.

So it only gets 300 miles per 60 litres of fuel and thats granny driving this is really crap what should i do ??? (sell it):eek:

ginger
 
cat5cable1 said:
hi all ok this is what i have done to my 300tdi disco, its done 170k.

new engine oil and filter
new fuel and air filter
egr mod and intercooler cleaned out and new top hose.
new glow plugs.

So it only gets 300 miles per 60 litres of fuel and thats granny driving this is really crap what should i do ??? (sell it):eek:

ginger
Click to expand...

Not good ... only about 22 miles per gallon.

It should do a lot better than that.

My suggestions include precision timing of the injection pump - probably advancing the timing quite a lot. In some engines, the "standard" setting is no good at all, and a BIG improvement is possible.

It is easy enough to do, and there was a series of threads on the procedure a while back..

Basically you are going to advance the timing until a blip on the throttle makes it "clatter", and back it off just enough so it doesn't "clatter".

If you don't understand this enlist someone who does, to show you.

30+ mpg should be within reach of any 300 tdi Disco

CharlesY
 
I got a mate who owns a garage and is a top notch diesel mechanic luckily to set up the injector pump , timing and turbo boost pressure on my 94' 200tdi and am now gettin' a shocking 35 mpg and even higher on long runs which came as a rather nice surprise considering the rediculous cost of fuel in the UK , he has told me if I remove the largest of the two exhaust boxes it will improve it a bit more as that box seems to get clogged up with crud and causes poor performance after a while .
 
on my old 300 could get 39 mpg on motorway [65mph ]and with my td5 auto at mo can get about 37 on motorway doing about 60mph.
i find good tyres does make a differance to fuel consumption.
 
oopss
also meant to say
1 - check ur tyre pressures - makes hell of a differance
2- fit a k&n air filter again good for ~2mpg
me I get about 575miles to a tank - and thats not watching the speed either
(flat out mostly):):):)
 
thanks for all replys, my tyres are standard and have about 38 to 40 psi and its a manual box, my old 200tdi gave me about 34mpg.

I do 6 miles total a day and no motorway runs.

Right this weekend i will set about it with my big hammer.

thanks
ginger
 
Got a 2002 TD5 Disco (manual), well serviced, just drive it normally, for 20 litres worth of fuel i get about 80 miles around town and about 100 on a run. I'm sure some people manage to get more to the gallon by driving carefully....but i don't...wish i did! :(

Mate has a slightly newer TD5 auto and his mpg is worse than mine....:D
 
I put 50 quid in my TD5 and get 130 miles and the diesel lights back on!!! I know the air flow sensor is nackered but do you think it could cause it to be this bad or something else....? Dan
 
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