ReturnoftheR

Well... I recently had some issues with my motor. The truck is a 1997 Tacoma, 3.4L V6. Around 90k miles. The problem started in the morning when it was still cold outside. The motor felt like it was shaking a bit, you could feel it in the shifter. It went away when warmed up. It did this in the morning, or when first starting up the truck a few times in the week until the check engine light came on and I took it to my mechanic. The scan came up with a misfire on #4 cylinder, and we decided it was either the coil, or a head gasket issue. We switched the #4 coil with another coil, to judge whether or not the coil was bad. Since then the check engine light has not come on so I have not been able to scan it. The motor still runs a little rough but not as bad. What would the symptoms be if it was the head gasket?

Please help me out with suggestions, you can ask me questions, etc. (I am no mechanic but I try, haha)

Thanks for the help