Sorry, I'm used to the DSM websites lol. The 420a is the non-turbo 2nd generation motor for the eclipse Same motor as in the neon and a few other chrysler cars, it's actually a chrysler engine. I'll be glad to help if I can, but I'm not nearly as familiar with the 420a as I am with the 4g63 (the turbo motor). I know they run pretty rich from the factory, but it sounds like yours may be something else, have you thrown any check engine lights?
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