2001 Ford Mustang Vibrates at Stops; Slow on Acceleration

My 2001 Ford Mustang, V6, 3.8L, (172,000 miles) vibrates when I'm stopped at red lights and slow to accelerate after stops. I have had a full tune up, new spark plugs and fuel system flush and check and still having problems. The code reader was a PO302, Cylinder 2 misfire and Cylinder 6 misfire. The repair shop said that they could not help me, but thought it may be a broken head gasket. Is this a possibility or could it be the wrong spark plugs (Bosch brand)? I've heard that this brand does not work well with Fords. Help!

Steve Says,

The first thing you need to do is find another repair shop...one that will actually do good work and care about their customers. If your car did not have this problem before you had the tune up then it is most likely something they messed up on.

The misfires are the reason for the vibration and low power. The most likely cause of these misfires are spark plug wires that were crossed or maybe not seated correctly (assuming they are the right ones for your car).

It is possible but very unlikely that your car has a head gasket problem (especially if it has never overheated) or any other major problems. I think you will find that it is probable a simple fix if you can find a good mechanic to look at it.

I hope this has helped!