I have replaced the battery, spark plugs and wires and also replaced the starter in the last 8 months. also I have replaced some fuses and the fuel filter and changed the oil. My car won’t start sometimes. it cranks but will not turn over. The fuel pressure is good and it sounds like it is firing but it will not start. Sometimes it will start right up after a try or two.
Also wanted to mention that when we replaced the battery less than a month ago, we bought some ethanol to help the fuel system and bought some starter fluid to put into it. once we did all this, it ran GREAT for about 2 and a half weeks. it started up every time on the first try. Then a few days ago it started doing what it use to do, start when it wanted to and not a minute sooner.
any thoughts on what this could be would be appreciated.