knock system questions...

[abatzis2@hotmail.com (Michael Abatzis)]

still can't figure out why the car is slow.  went to the yard, pulled the 
knock/fuel boxes from an audi 4k. it ran a little strange, so i checked 
timing and for some reason it was way advanced. i thought i found my 
problem, retimed, but still slow. questions:

1. is the knock box and fuel ecu the same on the 4k? look the same, have 
different part #'s. i was wondering if the ignition map might be a bit 
different (hence the screwed up timing).
2. a basic knock sensor question: how the hell does it work? does it advance 
it a certain amount (the 13' that bentley says?) and retard based on knock 
sensor input, or does it keep advancing till it senses knock, then retard a 
certain amount? some combo of the 2?
3.  what is the vacuum hose input for?

still pretty ticked at this car...

-Michael Abatzis
Hotlanta! GA-->Soon to be New Orleans!
1988 Scirocco 2L 16v RIP-->parting, finally taking orders: 
www.learnlink.emory.edu/~mabatzi/mikes_page1.html
1987 Scirocco 2L 16v...




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