Yep, I would replace the #4 injector, it must be getting clogged which alters the spray pattern which is most noticeable at idle. Here is how to change the injector out in the images below. Please go over all service precautions before you begin, (last three images). Check out the images (below). Please let us know what you find. We are interested to see what it is.
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Friday, September 16th, 2022 AT 10:53 AM