What this sensor for
#1
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What this sensor for
I was looking at my exhaust today and noticed a sensor in he cat well it's just after the cat and i can't decide what it is.
It looks to small to be an lambda sensor if i had to guess i would say it was a temp sensor but i'm not sure.
Any ideas anyone
It looks to small to be an lambda sensor if i had to guess i would say it was a temp sensor but i'm not sure.
Any ideas anyone
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#10
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i like that kind of talk. I'm only de catting it as the cat is blowing so it will have to come off to be replaced or repaired so i tought **** it fit a de cat pipe but i didn't want to start having to remap and the like
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"why cant that model of subarus ecu be mapped ? is it locked or what ?"
#23
Indeed the MY99-00 ECUs are not OBD(2) compatible, which shoots a rather major hole in your explanation.
Even for the newer cars that do OBD2, you can't use "any compatible" software to reprogram them, you will need something specific. Different manufacturers use completely different processor families - and completely different (and proprietary) programming routines to do the job. MY99-00 and newage Imprezas use a totally different programming protocol, for example.
The real reason why newer cars can be remapped relatively easily (and older ones couldn't) is the introduction and then increasingly widespread use of field-reprogrammable flash memory-based microcontrollers in their ECUs. An offshoot of the same technology that brought us iPods and USB pen drives, in other words.
As you say, earlier electronic fuel injection systems used either hardwired, unalterable control logic, socket-mounted ROM chips that needed to be removed to be rewritten, or, as with earlier Imprezas, the ability to run an option/removable map set.
Using a flash-based controller, once they became cheap enough, makes sense for a major motor manufacturer, because it reduces manufacturing costs and also allows issues to be fixed easily by your dealer network without costly hardware changes.
Last edited by Splitpin; 13 July 2010 at 12:38 AM.
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