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Bosch fuel injection book?
Anyone know where I can get the Bosch book on their fuel injection systems?
I have the CIS-E 2.22L NA 5, and am having problems adjusting the duty
cycle correctly. The specs call for 28% +- 1% when adjusting with the
oxygen sensor disconnected. For some reason the car prefers ~24%, and
I seem to recall that this may indicate some particular problem. I might
as well just buy the book and really learn how the system works (K-jetronic,
or something like that?). Also, the engine seems to run better with the
charcoal canister t-vavle cap off, which makes no sense.
It seems to me that there is a large number of possible combinations
of idle screw setting and fuel mixture setting that will achieve a certain
duty cycle. For instance, if you open up the idle screw, you need to
richen the fuel mixture a bit. First, is this correct, and second, how
does this affect the engine performance? (I would assume that there is
an optimal setting, and other settings would yield less power/efficiency).
Not to harp on it too much (too late! :), but my engine seems to react
differently when accelerating from idle. When I am adjusting it and
apply the throttle (from under the hood), it immediately accelerates. Once
I put it back together (unstop and reconnect the vacuum hoses), it seems
to lag for a couple of seconds when applying the throttle from idle. This
lag is definitely noticeable when driving, it seems like the engine makes
very little torque (which is unusual for a Coupe). I think it is a fuel
mixture issue, because adjusting the fuel mixture changes the amount of
"lag", but I haven't figured out how it is related. I have, in the past,
been able to get rid of the lag through the mixture adjustment, but cannot
seem to do it this time.
Maybe I need another Audi to benchmark it against. Andrew Speers, you
up for a get-together? Anyone else in Austin, TX wanna meet? :)
Thanks, gang, for any ideas.
Eric
'85 Coupe GT, constantly being played with (and complained about!!)
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Eric J. Fluhr Email: ejfluhr@austin.ibm.com
630FP Logic/Circuit Design Phone: (512) 838-7589
IBM Microelectronics Div. Austin, TX