I swapped the plugs and nothing happen still code p1310-p0304

volvo at gap 28

is turbo

what is strange is that it was working fine until i pushed accelerator hard

I already did that and everything looks good I dont know the next step ,plus the engine seems to be out of time

About two weeks ago I did a tune up on my volvo and I changed wires, spark plugs, rotor and distributor and they were volvo original parts. After I did that the engine was like it never it was it was working very well. and and the problem started by me driving like at 50 mph then I push the brake an...