Anyway introductions aside my rev is having a hard job getting through co emissions test on fast idle then again it always has but now it's failed, the limits are 0.300% and mine is 0.387% no matter how hot the cat and engine is, yet CO at idle is 0.001% so it passes it easy, hc is at 22ppm and lamda is at 9.99
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I've been looking into my fuel trim tonight with a volt meter across E1 and VF1 with the engine spanking hot my engine is super lean at idle its on 5.00v which means the ecu is having to really richen up the mixture on idle but when i take her up to 2500rpm the voltage drops back to 2.88 volts which is still a slightly lean condition so ecu is again banging in more fuel, I know my 2 is running lean because it pinks and the plug are to clean and white on the electrode tip, she does misfire a bit when I raise the rpm
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anyone know what could cause me to go so lean on idle and slightly lean with rpm.
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this is what I've done so far
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so kinda scratching my head now as to what is causing this.
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