Can poor voltage cause an engine to idle rough while at a stop yet otherwise run good?

Yes, poor voltage can cause an engine to idle rough while at a stop, yet otherwise run good. If the voltage is too low, the fuel injectors may not be able to get enough power to open properly. This can cause the engine to run lean and misfire, which can cause a rough idle. In addition, poor voltage can also cause the spark plugs to not fire properly, which can also lead to a rough idle.

Here are some of the symptoms of poor voltage that can cause a rough idle:

* The engine may stall when you come to a stop.

* The engine may hesitate when you accelerate.

* The engine may run rough at idle, but smooth out when you give it gas.

* The engine may misfire.

* The check engine light may be on.

If you are experiencing any of these symptoms, it is important to have your vehicle's voltage checked. If the voltage is too low, you will need to have the battery or alternator replaced.