i have an 04 5.9 and when i rev the engine in park or neutral, the rpms seem to get stuck almost and isnt a smooth rev coming back down to idle. im not sure if anyone can help me out or has had this problem
my truck did that when my injectors were bad...just my 2 cents......does it start hard or harder than before?....does it smoke abnormally? check ur oil for fuel contamination...you should also fill out your sig so we know wat you have in ur truck....good luck!
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