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Hello,
Easy. Italian tune-up time. Fresh tank of the highest octane gas you can get plus a bottle of fuel system cleaner. Your local auto supply store might even sell cans of that "guaranteed to pass" stuff. Then drive the crap out of your car for that tank.
An engine that is too cold or one that is too hot will cause it to run out of spec. As to the effect of that emissions, I know that the shop that does mine puts a big giant fan in front of the car when they test to simulate air flow while driving.
Happy Bricking!!!
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Richard - '87 245 DL , '82 242 GLT - Half a million km between them!!!
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