Hello, I'm struggling to get my l28 running properly. Cranks and warms up well, but once at operating temp it stumbles under load almost like in a limp mode or something. Recently replaced injectors, injector plugs, rebuilt distributor, coil, coolant temp switch, fuel rail. Connections all appear to be secure. Removed coolant bypass system. Played with timing seemed to help at first but once at operating temp makes no difference, will rev but under load it stumbles and struggles. Any help would be great, thanks in advance