Vehicle & Technical > Discovery

Q1. EGR and fuel consumption

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davidjmiller:
Ok, so a few weeks ago I blanked off my EGR with a plate off the bay. Beforehand I was getting somewhere over 25.5 mpg out of my 300 TDI auto disco, from the last two tanks only getting 22 mpg!! Does that sound right??

I guess I have to de-cat to get it back, yeah??

At least I only paid 97.7 ppl today, in the summer I paid 132.p ppl on three different occasions!!Cheers,

David

auf_wiedersehen_pet:
I got 22mpg before and after the EGR blanking and then 22mpg before and after the decat!

SteveGoodz:
I've kept pretty detailed records on an Excel spreadsheet of the fuel consumption I've been getting from my 300Tdi since I bought it. There's no obvious sign - in terms of fuel consumption - of when I removed the EGR system or when I put it back on :-(

What I can see quite clearly is deterioration in the air filter over time and a step improvement from the day it's changed. This is so pronounced I now use the mpg graph to decide when it needs changing :-)

HTH

davidjmiller:

--- Quote from: SteveGoodz on December 22, 2008, 21:58:03 ---I've kept pretty detailed records on an Excel spreadsheet of the fuel consumption I've been getting from my 300Tdi since I bought it. There's no obvious sign - in terms of fuel consumption - of when I removed the EGR system or when I put it back on :-(

What I can see quite clearly is deterioration in the air filter over time and a step improvement from the day it's changed. This is so pronounced I now use the mpg graph to decide when it needs changing :-)

HTH

--- End quote ---

as a project manager at work I find I have an excel spreadsheet to cover most aspects of my personal life as well!!! I had a new air filtered fitted at full service 3,500 miles ago, midsummer, so surely it would not need a new one yet would it???

Bought the car Oct 25th 2007, 18 tanks of fuel at average 25.5 mpg, blank off egr and then two fulltanks at 22.5 and then 21.7. A bit worrying that its still going down.

Just remembered - fitted the steering guard at abou tthe same time but it's not that heavy is it???

David

Range Rover Blues:
Well it won't help.

The EGR and the oil breather combine to fill the inlet manifold with black sludge, try cleaning the intercooler out too.  I disconnected the oil breather from next to the turbo and fitted a catch tank, the inlet is still shiney silver a year later.

Still smokes though :-k

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