slidingsideways13 wrote: ↑Sat Aug 15, 2020 1:08 am
Fuel pump is hardwired to battery via switch/ relay system and with the fuel pump on the engine tries to start but won’t catch. Turn off fuel pump and the engine actually starts and runs until it fully burns any remaining fuel. Turn pump back on and it won’t fire. Has basically new DW 1000cc injectors on a tuned RS Enthalpy z32 Ecu. Thinking the Ecu is shot somehow and no longer controlling fuel correctly, red led on Ecu is constantly lit and will not switch to diag mode. If it idles with fuel pump switched off and I switch pump on it will instantly stall.
I'd be focusing on this. So you hardwired the fuel pump, what did you do to the wires from the chassis? How is it hardwired, exactly? It almost sounds like you're backfeeding 12v through the chassis harness to the ECU (maybe through ground even?) This specifically seems like it's related to your problem if it isn't the issue itself.
That's weird about the red light on the ECU as well. Have you reached out to Martin @ Enthalpy regarding that? They're incredibly supportive of their products and Martin is very helpful.