I have tried replacing the air filter and oil change added some zmax multi system microlubricant and I'm still having the same issues. The car idles rough, at stop lights, both when its cold and when its hot but more frequently when its hot. Occasionally while it's hot and I'm cruising at a steady speed there is hesitation in the engine. The engine is a 2.7 v6, on my 1999 Dodge Intrepid se. The engine is not throwing any codes.
why do I have a rough idle at stop lights an engine hesitation while cruising on 1999 Dodge Intrepid
check for a vacuum leak and clean throttle body
OK, I cleaned the throttle body, which did not look too bad. and that didn't help, in fact it feels as though it got worse. As for a vacuum leak, I do see 2 plastic 1/4" hoses, just above the passenger side of the engine. One of the hoses is connected and the other one is broken. Any idea what these hoses go to?