Stoich ???
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Joined: Sep 2004
Posts: 116
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Good to know. I didn't know Ford went that fat with the A/F ratio. Better a bit rich than lean IMO.
If your writing a book I get some of the royalties.
The flex fuel vehicles have sensors to detect ethanol content and make adjustments from there. My 04' 2V didn't adjust for anything, it trys to run the A/F ratio its programed to run, it doesn't know the difference between E10, E85 or straight gas.
If your writing a book I get some of the royalties.
The flex fuel vehicles have sensors to detect ethanol content and make adjustments from there. My 04' 2V didn't adjust for anything, it trys to run the A/F ratio its programed to run, it doesn't know the difference between E10, E85 or straight gas.
I knew the flex fuel vehicles had additional sensors to determine fuel content, but I would think non-flex fuel vehicles would have to compensate, also. Shouldn't the O2 sensors show the difference in the exhaust gas composition, causing the engine to adjust the fuel trim? The ECM would still "think" it was getting 14.64, but would actually be going lower to get closer to the desired emissions. A reactive adaptation due to emissions rather proactive one from fuel sensors.
I'm just wondering, if the engine is trying to maintain a higher A/F than stoich for E10+, how does the resulting lean condition affect everything. Or am I looking at the whole situation wrong?
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