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  #11  
Old 03-16-2009, 05:24 PM
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Reason I'm asking is because I've almost always run generics (1,3, and 4 wire) and i've never really had a problem (maybe I did and I didn't know it). Even the 1 wire generic bosch sensors I used to run in the turbo cars seemed to live and work OK.

Only vehicle that has been picky is the Cruiser with the Vortec.. for some reason the 02 sensor heaters on this system run at a slightly higher voltage than the computer expects.. so it throws a code. I went through lots of 02 sensors (and sensor positions)trying to figure that one out. Spent a lot of money on OEM sensors from GM too (not toyota.. I know).

Just wondering what i can learn because i hear lots of people say not to go generic.
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Old 03-17-2009, 07:00 AM
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Most of my 1 wire is from my turbo days and the days before obdII. I think with the less complex maps, and even more crude CIS systems, the voltage and resistance issues weren't as big of a problem as with the more complex injector systems.

As the injection/emission systems went to controlling more at start up as well as aiming to increase reaction times, the generics just didn't match up. I noticed back in the day as well that it depended on the systems design. Some systems went closed loop when operations went out of range/band, others went closed.

It also depends on what the operational efficiency of the combustion was nominally. Most turbo cars were designed to be "over-rich" anyway, and o2 out of range set to fail in full rich of operational range, which wouldn't be noticed by the driver, as it might actually run better, since it was set as lean as possible (still being rich) to get in the states in the first place.

I haven't turned a real wrench in years, and robbie or others are probably better at commenting on this... I think toy's in general put more into the efi mapping / computer systems vs the older german turbos (porsche) that eeked everything out of physical design parameters, now physical isn't going to cut it. With variable efi mapping, comes variable valve timing in addition to variable spark timing.. I am sooo glad my "modern car" is under warranty. I don't have a degree in ee or physics



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Old 03-17-2009, 10:17 AM
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Quote:
Originally Posted by Beater View Post
Most of my 1 wire is from my turbo days and the days before obdII. I think with the less complex maps, and even more crude CIS systems...


j
CIS?

Would the 3FE fal into that category?
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  #14  
Old 03-17-2009, 04:03 PM
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CIS is constant injection system. A bosch term. Constant flow injector. Multi point, but not real fancy. http://home.hiwaay.net/~langford/CIS.html
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