Just the injection, fuel delivery and ignition.
Not the engine it’s self there are loads of build threads on that.
Manual – Injection and ignition
Click to access VW_Transporter_80-92_2-1_Inj_Ign.pdf
Manual Digijet
Click to access DigifantProTrainingManual_SingleSided.pdf
Wiring diagrams
Click to access VW_Transporter_80-92_DJ.pdf
Links:
Vanagon (Digifant) Air Flow Meter (AFM) Adjustment Procedure (Digifant so may not be exactly the same) – Samba
https://www.thesamba.com/vw/forum/viewtopic.php?t=356377
Troubleshooting Idle Control Valve (high idle) – Samba
https://www.thesamba.com/vw/forum/viewtopic.php?t=542448
Inside a distributor idle stabilisation unit DIS – Samba
https://www.thesamba.com/vw/forum/viewtopic.php?t=534974
2.1 DJ dls unit – the white plastic thing 251 906 083 A – How it works
https://club8090.co.uk/forum/viewtopic.php?t=168830
idle won’t come down Digifant
http://www.gowesty.com/tech-article-details.php?id=7
AFM Mixture screw
https://club8090.co.uk/forum/viewtopic.php?t=168510&start=0
Brickwerks blog checking coil
https://www.brickwerks.co.uk/brickwerks-blog/t3-ignition-checks-ignition-coils/
Testing hall sender
https://club8090.co.uk/forum/viewtopic.php?t=160851
https://club8090.co.uk/forum/viewtopic.php?t=152836&p=8144062
Wiring
main loom
Black box loom
How looms join
ECU
This is a Manual gearbox ECU shown with an F suffix, Auto gearbox has an E suffix
The reason is explained by Aidan…
autobox is only 3 speed manuals can be 4 or 5 speed so the ecu needs to be mapped to cope with the different driving characteristics of the transmission especially the shift points built into the autobox; with a manual you can drive it according to the engine and choose your shift points and you learn the characteristic of the engine and adjust your driving style accordingly
AFM Air flow meter
Throttle Body
Throttle position switch under throttle body
Idle control valve
Idle valve controller behind air intake trunking accesses=d by removing rear light
Distributor
Vac pipe connections
Distributor idle stabilisation unit
Aadvances the timing to keep the idle speed stable when it drops below the set threshold
Fuel pump and fuel filter
fuel pressure regulator
metal replacement bulkhead connector ( original plastic can fail)
Plenum
Injectors
Plenum and fuel intake exploded view
LPG
DJ LPG mixer before AFM and Backfire valve
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