回复：I have no problem to restart the engine and

Then check and change the spark plug and wires, check alternator and regulator, fuel lines pressure, regulator and fuel filter. Check the MAP as well. If everything is fine, do you feel vibration of your car? Do you see more than 1 qt of oil loss for every 3000 miles? If so, check the compression pressure. Check the vacuum line. If all is fine, check the ATF. In most cases it is a engine perfomrance issue.