(Note: decided to move the Metro related babble into this new thread, rather than continue to hijack Dan's Project KBA, KMA thread.)
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I haven't seen any information about lean burn at teamswift or in my factory service manual. I think the article you quoted is wrong there. |
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I've seen several comparisons of the XFi drivetrain design vs. regular 3-cyl Metros, and have never seen lean-burn on the list. I think if it did have lean-burn, its numbers would be even higher than they are. Would lean-burn require a 5-wire o2 sensor, for example? Both the XFi and non-XFi share the identical part there, and it's a 1-wire affair (for a '94 Metro, according to the rockauto.com catalogue). I've raised the question at teamswift - maybe someone can answer definitively. --- PS - anxiously watching this thread to hear about Dan's trip... |
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I think the ECU may have looked for the lean-burn signal from the O2 sensor rather than lambda, but I don't know. I actually remember reading that the NOx emissions were higher on the XFi due to the lean burn, but I'll have to find my source again. |
Heard back from a teamswift member, who intelligently pointed out that the sentence in the linked article doesn't explicitly say that the Metro has lean burn. Read it again...
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Bank robbers often drive getaway cars, and Dan is driving his new VX from Chicago today. |
I knew there was something odd about dan...
Anyway, why doesn't someone just hook a DMM up to their car and go for a little ride? |
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I think I've already done the DMM lean burn test equivalent for my car when I did the speed vs. mpg chart. If there were a lean burn mode, I would think it would show up differently than the essentially smooth line I got. From the reading I've done of Insight drivers, the slip in & out of lean burn mode is blatantly obvious on the instant fuel consumption display. However, if it's only an XFi feature, I can't test that. But... the owner of the XFi who pointed out the sentence structure issue was also unable to find any reference to lean burn in his service manual. |
I have no clue where I got the idea it was. I actually wrote it in my log way back in September/October. Maybe I found a reference to NOx emissions and assumed the XFi was lean burn...:confused:
I'll just say it was due to my brain-cloud. :p |
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