Engine Size: 4.6L V8
Issue / Question:
My engine stutters after warmup between 1,500 and 2,000 RPM after stopping. The problem persists even after replacing 6 of the 8 coils as well as the spark plugs. There are no codes showing up on the computer and no service engine light. Can you help?
It sounds like a lean condition. You may just need an injectors cleaning service. We can look at the O/2 voltage and injector pulse and get a good idea if cleaning the injectors helps. Let us know if you want us to help.
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