Bennehboy

Well-Known Member

• Jul 7, 2015

• #21

So in effect timing is achieved mechanically then and it's just the quantity of fuel released that's controlled by the ECU.

 

sierrafery

Well-Known Member

• Jul 7, 2015

• #22

something like that... that's the way these engines with ''pump injectors'' are working

 

G

Gearmuncher

Member

• Jul 7, 2015

• #23

still don't know how it knows it is on the power stroke, maybe it fires injectors at every TDC but will only injects fuel when the lobe on the cam shaft is in the right position, ie every other TDC per cylinder.

 

Bennehboy

Well-Known Member

• Jul 7, 2015

• #24

Think it operates the injector on both strokes, just that only one of them will the injector be fired by the compression of the rocker arm... it only fires if there's sufficient pressure of fuel.

 

R

Richfield

New Member

• Jul 26, 2015

• #25

Still not able to start after checking everything is it just being s b***h on the purge

 

N

Nigel1943

Active Member

• Jul 26, 2015

• #26

I'm curious as to why the timing chain snapped in the first place. It shouldn't have done. Something in the engine drive chain must have locked up to cause this. Have you investigated?

 

Gazbo

Well-Known Member

• Jul 26, 2015

• #27

Nigel1943 said:

I'm curious as to why the timing chain snapped in the first place. It shouldn't have done. Something in the engine drive chain must have locked up to cause this. Have you investigated?

Click to expand...

Chain breakage in Td5's is not uncommon, or so I've heard and read, beggared if I know why though, perhaps the chosen chain is underrated for the job, who knows, most other engines with chains will run until the chain is stretched beyond belief and rattling like a marble in a trash can, in my experience.
I aspired at one stage to convert my Tdi engine to chain drive cam etc, I believe it is doable, but from what I've heard, I'll stick with the elastic band and just replace it regularly.
I realise this diversion does not help with the original question, but because of such problems with electronics etc is why I am keeping my Tdi, the technology employed is in keeping with my mechanical abilities.

 

N

Nigel1943

Active Member

• Jul 26, 2015

• #28

Maybe so, but I've not heard of it and at147k it really shouldn't happen.

 

R

Richfield

New Member

• Jul 27, 2015

• #29

I think that a rocker got broken and the bits found there way into the chain as there were quite a few pieces in the sump.

 

D

digby

Active Member

• Jul 29, 2015

• #30

Are you sure that the cam timing is correct and that the pump timing is correct ??