1999 Dodge Ram 2500 Q&A

1999 Dodge Ram 2500 Question: I have a 99 ram 2500 starts good and stays running when I step on gas petal

It feels stiff and I have very little acceleration I've changed cap rotor wires and cleaned throt.body and no change what can I do to correct this problem please -
Answer 1
WHAT ARE THE ENG CODES IF ANY? -