Foggy
Member +
Right my ep91 is misfiring under hard boost. This only happens after been on the motorway for a while. It feels like fuel cut when it happens but i have a jam ecu so it cant be. No ecu light comes on either. My mods are jam ecu at 1.1 bar, ported wastegate, decat, aftermarket manifold, fmic and so on. Also my plugs are fairly new (ngk heat range 7). Any ideas chaps what the problem could be?