AFN swap won’t start

Mark buster

Member
Joined
Feb 15, 2019
Location
Bristol
TDI
AFN
Hi
I’ve recently converted my vw T3 from 1.6td to a AFN tdi.
I’ve got VCDS (Ross tech) and apart from not having the potentiometer and brake and clutch wires connected it will not start.
I had to remove the IP to adapt the block for the conversion
And timed it back up.
I’ve tried to vacuum fuel through to remove air in the fuel lines but still can see air between filter and pump.
When cranking I’m getting fuel through to injectors
White/dark grey smoke from exhaust
Good battery
New glow plugs
Good compression.
Also tried easy start

Any suggestions guys as Losing the will to live?
Thanks
Mark
 

mogly

Veteran Member
Joined
May 27, 2003
Location
Sarnia, ON, Canada
TDI
MKIV TDI + B5.5V AVF/01E
12V at the cut off solenoid? Can you hear an audible snap from the solenoid when power is applied?
 

Hasenwerk

Vendor , w/Business number
Joined
Nov 28, 2003
Location
Quesnel, BC
TDI
1982 Cabriolet (BEW|VNT17|Stage4), 1989 VW TriStar Syncro soon-to-be CR TDI (CBEA), 2001 Ford Ranger Edge 4x4 (ALH|VNT17|R520|Stage4)
If no error codes are present in the ECU, and you didn't mess with the timing, I would strongly suggest that you have not bled all the air from the system.
 

k_pt

Veteran Member
Joined
Oct 13, 2017
Location
pt
TDI
VW MKIV TDI
Hi
I’ve recently converted my vw T3 from 1.6td to a AFN tdi.
I’ve got VCDS (Ross tech) and apart from not having the potentiometer and brake and clutch wires connected it will not start.
I had to remove the IP to adapt the block for the conversion
And timed it back up.
I’ve tried to vacuum fuel through to remove air in the fuel lines but still can see air between filter and pump.
When cranking I’m getting fuel through to injectors
White/dark grey smoke from exhaust
Good battery
New glow plugs
Good compression.
Also tried easy start
Any suggestions guys as Losing the will to live?
Thanks
Mark
Potentiometer off won't be the reason, will only raise idle.

What compression? Was timing double checked?

Instead of vaccum fuel, close all the lines, try to crank the engine with and injector open, as soon as it squirts, tighten it.
 

Mark buster

Member
Joined
Feb 15, 2019
Location
Bristol
TDI
AFN
Potentiometer off won't be the reason, will only raise idle.
What compression? Was timing double checked?
Instead of vaccum fuel, close all the lines, try to crank the engine with and injector open, as soon as it squirts, tighten it.

Hi yes timing triple checked
Compression ranging from 350-390 psi
Cranked many times and getting fuel through injectors pipes and closing whilst still cranking.
As soon as I stop cranking air runs back up the feed pipe 2-3” bubble.
Thanks
 

k_pt

Veteran Member
Joined
Oct 13, 2017
Location
pt
TDI
VW MKIV TDI
350psi seems a bit low, is the compression gauge any good?
 

GTiTDi

TDIClub Enthusiast, Macht Schnell! Vendor , w/Busi
Joined
Oct 18, 2010
Location
3 Spruce st Wareham, gateway to Cape Cod Massachus
TDI
'91 GTI CJAA swap,'02 Jetta wagon ALH swap, '03 GTI 1.8T rally car, '03 Sprinter 3500
put a low pressure fuel pump inline with the feed line to the fuel filter, crack the injector line nuts a bit and crank it over until fuel spurts out, tighten the line nuts and it should run
 

Mark buster

Member
Joined
Feb 15, 2019
Location
Bristol
TDI
AFN
put a low pressure fuel pump inline with the feed line to the fuel filter, crack the injector line nuts a bit and crank it over until fuel spurts out, tighten the line nuts and it should run
Would this be just to get it running or a permanent fixture?
Thanks
 

markd89

Veteran Member
Joined
Oct 21, 2009
Location
Los Angeles
TDI
1978 VW Bus 1Z TDI
Edit: Re-read your post.

If you have smoke, you have fuel. Check mechanical timing and try advancing it.
 

Mark buster

Member
Joined
Feb 15, 2019
Location
Bristol
TDI
AFN
Edit: Re-read your post.

If you have smoke, you have fuel. Check mechanical timing and try advancing it.
I’ve checked the timing a couple of times
And I have the correct IP pin
To advance the pump would it just be moved via the bolts,twisting the pump away from the engine?
Sorry learning on the job
Thanks
 

Mark buster

Member
Joined
Feb 15, 2019
Location
Bristol
TDI
AFN
Edit: Re-read your post.

If you have smoke, you have fuel. Check mechanical timing and try advancing it.
Ok so twisted the pump towards the engine and after a few goes
It sprung into life (Hugh relief )
I don’t think it’s perfect and needs fine tuning but it’s running
Thanks markd89
 
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