Troublesome misfire

They did not check that as far as I know. How can they check the compression? The intake completely covers the spark plugs. Wouldn't it misfire all the time if the compression was off? I drove it 85 miles the other day before it started misfiring. It doesn't have any codes but when I ran a "test" on the Torque app with a wireless OBD it said cylinder 1 had 3 misfire and cylinder 4 had 98 misfire 2 and, 3 cylinder had none. I will take it back to the dealership probably Thursday but was hoping to figure something out sooner. What about the ignition coils?

I will have them check that next. What would cause the compression to be wrong and what would the fix be?

Also would it only misfire after it had run along time? What about the spark knock?

Just got it back yesterday. They did a compression test with results being 149 on three cylinders and 150 on one cylinder. Can't remember which but they said it was good. They did not do a leak down test cause they said I didn't ask for one. But I did. I told them if it looked okay to replace all coil packs and all plugs (NGK iridium). Which they did. I picked it up and drove 110 miles with the AC on in 80 degree heat. No problems no misfires. Until 111 miles. It just cut off while driving no warning. Will turn over but won't start. It now has it's first trouble code of p0304. I noticed a slight scent of antifreeze but didn't see any leaks and it is almost full. And the engine felt relatively cool considering how far I had just driven it.

I was already thinking fuel problem. Just a hunch. But I will have both checked just to be sure.

I will thanks for the help.

The shop just called and said there is no fire to the coils and they don't know why. Any ideas? The engine turns over fine and the dash is all lit up but no fire.

They just called and said one of the new Aftermarket coils melted and several fuses we're blown. They replaced the fuses and now it runs but they recommend putting the old original coil packs back in as that doesn't seem to have been original misfire problem and the new coils are crap. So back to square one. But at least it runs again.

He said it runs fair.A little rough cause of the coil. But I don't think they have driven it. He also said they were checking for bad grounds that may have caused it.

It died while I was driving it after the new coil packs. It was running fine and then cut off and would not start back up. He is telling me that it would not start because when I was driving it the coil melted and blew several fuses that kept it from firing again.