please help me with this because i'm about to throw away this car. i bought an engine for this car 2 weeks ago .i tried starting the car and... nothing.the fuel pump was broken, i bought another one and nothing again. i tried to find a repair manual but ididn't find any.so i've got a solus diagnostic tool. these are the errors:
electrical problem circuit
17917- idle stabilization valve n71
17817- tank ventilation valve n80
17609- injection cylinder 1- n80
17613- injection cylinder 5- n83
17612- injection cylinder 4- n33
17616- injection cylinder 8- n86
17919- intake manifchangeovervalve n156
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16944 power supply not plausible
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17800 bank2 camshaft g40 sensor open circuit/short with power


someone please help me .

This coming from an Audi noob, but I would chase down the " 17800 bank2 camshaft g40 sensor open circuit/short with power" code first. This may or may not be the correct way, but I have found when working on multiple codes on a crank no start situation, I always try to deal with trigger items first. Hope that helps. Find yourself a manual and dig in. Try to work on one issue at a time.

...one other thing, is the engine you put in the same year as your chassis?

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97 A8 4.2 Quattro
88 Crx 397whp 11.9@120mph 5800' ASL

Might be stating the obvious but did you buy the engine complete with its ECU and the same engine code as before?
Look on ebay for Elsawin CD rom as far as a manual is concerned.