I just replaced my camshaft synchronizer on my 4.2. it's working better however it still sputters while reaching the 4000 rpm mark then it catches and fixes itself. What could be causing this. Im thinking the lack of oil supply 🤷🏻. What should I do?

 

Some engines have a REV-LIMITER and that may be what is happening.

 

Yea but I thought that it wouldnt affect the acceleration. And only revving in park or neutral
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Quite a few engines have had a connecting rod go out the side , one of the benefits of too high RPM., not necessarily in neutral, lol.