Diesel Engines Inj. pumps - AAZ pump adjustments

HarryMann: Inj. pumps vary a lot, even on nominally the same engines

1.9TD AAZs (usually from Passats) are excellent substitutes for the 1.6 JX TD in many T25s. There are a few gotchas, but here is a pciture of a particularly complicated, but 'manual' sdjustable pump, with some notes for increasing fuelling...

1) The slotted screw that seems to give it real go and a bit of smoke (but raises the idle) 1/4 to 1 turn in (locknut is 13mm) Main fulelling screw

2), 3) Don't touch, provides reference face for dial-gauge timing adjustments

4)Solenoid for cold start advance (pulls a cable along engien side of pump which works a lever same side, small travel with adj. stop)

5) Lever, possible cold-start or boost enrichment (used to have something like this active from cab, when intercooler fitted, for towing caravan, kick-down)

4) & 5) maybe be interchnaged (yet to clarify)

?) Breather for LDA boost enrichemtn unit (the diaphragm cover to top of unit)