It seems like engine misfire.
Do you have engine light? If yes, have it diagnose and get back with the code(s).
If no, check the charging voltage.
The actual output voltage produced by the charging system will vary depending on temperature and load, but will typically be about 1-1/2 to 2 volts higher than battery voltage. At idle, most charging systems will produce 13.8 to 15.3 volts with no lights or accessories on. This can be measured by connecting the positive (+) and negative (-) test leads of a voltmeter to the battery posts while the engine is running.
Sunday, December 20th, 2009 AT 12:53 PM