First, there are several sensors that can cause this problem. IF the check engine light is on or has been on, then there will be a code stored in the computer. Take the vehicle to a nationallly recognized parts store and have them scan the computer. Most will do it for free, and that way we will know where the problem is coming from.
As far as the black smoke, that indicated the air / fuel mixture is too rich (too much gas). The problem could be a bad O2 sensor, temp sensor, IAC, vacuum leak, plugged catylatic conver, or the vehicle may need a good tune up.
Have it scanned and let me know what you find.
Friday, October 30th, 2009 AT 8:07 AM