[Vwdiesel] ECO runaway/blowby

[FJ40Jim at aol.com]

My 7.3L diesel does the exact same thing.  The tank gets low and then it sucks a slug of air up the fuel line.  If its in neutral when the air hits the pump, the engine revs up in a raggedy way.  If its in gear, its hardly noticeable.  I always thought it was strange that a diesel engine (diesels are fuel limited) would rev up when it wasn't getting fuel.  It must be allowing the timing to advance or something...

I've never noticed this behavior on a VW/Audi/Volvo diesel w/ a bosch pump.  Anybody else?

On 2/28/2005, LBaird119 at aol.com wrote:
<< In top gear he can be
cruising at 50mph when the car will suddenly lurch forward
and race towards the car infront.>
< This is basically what Dad's 5.7 GM diesel pickup would do when it 
ran out of fuel.  Mabe there's an air leak and it's doing something 
simliar??  Dad's was from getting a gulp of air but not sure why it 
would take off.  Could be timing but it seems more likely that it 
was lower pressure in the pump which increases the fueling.>>
-- 
Thanks,
Jim Chenoweth
Lancaster, Ohio, USA