Hey guys new to the forum need some help.

built a b20v ycp pistons new bearing arp rod bolts and head studs, gsr head rebuilt by cylinder head rebuilders in portland or. so put this motor together with rdx injectors skunk 2 IM new distrib new ngk wires new plugs bkr7e, ecu is p72 with base map from a good tuner. Found out this issue when i brought my vehicle to get tuned. having misfire in cylinder 1 comp test is at 200psi rest is at 215-220, rest of cylinders run with no issue only started and ran fresh engine to bleed coolant system very fresh motor. pull the wire to 1 no change put new plugs already in it ran better for a little then right back to running rich black soot on plug. swapped injectors around no change, used a noid light blinking like it should. swapped ecu to p28 came off running vehicle just put my base map in it ran the same. at a loss guys oh also did valve lash might check it again when i get the car back to my house. any ideas fellas?

 

also replaced wires again thinking it was weak spark no change

 

Any ideas fellas?

 

Just saw an 8th gen Civic Si with a dead miss in one cylinder... compression numbers were good and the valve lash was spot on... turned out to be a cracked spark plug.

 

Not cracked spark plug on the porcelain ive got new plugs as well as swapped plugs around

 

Bump got back into the garage trying to get this thing running right need help

 

When you say misfire, do you mean that the number 1 cylinder is not firing at all ? Have you tried another base map chip ?