2003 Ranger
I had my intake manifold replaced and that fixed the original problem of rough idle and wanting to die at a stop. Since then the engine knocks and pings all the time now and it never did that before. I took back in and your guys could find nothing wrong. It is still not right. I spent over $800 on this repair and I'm really not very satisfied. I use Dobbs exclusively for my vehicle maintenance and repairs. This is the only time that I have had a less than great experience. The engine still knocks and pings but you guys say it's okay. Don't know what to do.