yes, it's enough to cause a multitude of issues with how the car runs once warm.car seems to hesitate before she goes-new plugs wires cap and rotor , anyways the o2 sensor on drivers side is broke and loose. is that enuf to make my car hesitate? im gettting ready to change but want to know if anyone has any other ideas or input
bad 0/2 sensors dont make a car hesitate. unless maybe if it is hot.maybe look at map or mass or temp sensor.or if you got a k&M oil filter and you put to much oil in there.
You should have an IAC, it would be located on the throttle body. On a GM it's usually a round valve/motor with a 4 wire square plug.also changed the o/2 sensor-still does it a little-does my car have an idle control valve? or what
he already replaced the O2 which helped but did not eliminate it completely. An O2 that's broken/loose as he stated should be the first thing to fix, as no matter what it can cause issues and needs to work correctly.An O2 sensor doesn't respond quick enough to capture the instance when you step on the gas to go. The O2 sensor does a better job of reading the steady state mixture. The computer is programmed to zap the mixture up when the throttle positon sensor changes.
If the engine can't get the mixture in the ball park due to a bad O2 sensor, it's estimates of how much fuel to add when you step on the gas can be off. Replace the sensor for starters. Chances are it won't fix your problem. But anything you try to repair without a working O2 sensor may result in other issues that make you chase your tail.