misfire

Hello all, my dad is a new XL7 owner as he has given up on BMW for reliability problems. Our issue is we are pulling codes for idle air control valve and misfires in cylinders 1, 3 and 5. He replaced spark plugs and coils to no avail. What would y’all recommend next? Thanks in advance

Hi everyone, I am new here and hope you people would be able to help me out. I have a Liana 1.3 manual version. I recently did an engine swap to m16a from a Suzuki Swift Sports Assembly. Using the stock m13a manual ecu in my car. Once everything was fitted and in place, we started the engine and...