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Old 12-07-2014, 07:29 AM   #14 (permalink)
320touring
Master EcoModder
 
Join Date: Jun 2010
Location: scotland
Posts: 1,429

The Mistress - '88 Bmw 320i Touring SE
Team m8
Last 3: 27.17 mpg (US)

Germany Beadle - '91 Mercedes 300td (estate, N/A)
90 day: 24.63 mpg (US)

The Bloodylingo - '05 Citroen Berlingo Multispace Desire
90 day: 39.77 mpg (US)

Shanner Scaab - '03 Saab 9-5 estate Vector
90 day: 26.19 mpg (US)

Clio 182 - '05 Renault Clio RS 182 182
90 day: 31.73 mpg (US)
Thanks: 89
Thanked 89 Times in 74 Posts
Quote:
Originally Posted by oldtamiyaphile View Post
Forgive the dumb question but since a diesel has no throttle or ignition, how else can you drop revs other than cutting the fuel?

On my petrol cars the injectors cut out if you're off the throttle and above about 1500rpm
Therefore no fuel is used.

On this engine, the fuel pump is driven from the engine, so if the engine is pumping it still moves fuel. On the last one i had-best results were achieved by using neutral and idle rather than in gear decel up to junctions
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http://fuguttycars.wordpress.com/

US MPG for my Renault Clio 182


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