Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
Hi Im David, thanks for visiting the site. the very first thing to do is to inspect the wiring for mouse chewings. it was outside for a year and the critters love the taste of the wire insulation.
Hi JA cust,im stew a mechanic here in australia,fuel pump will only run when ecu see's a rotating crankshaft,rotating crankshaft=energise fuel pump relay..you say it runs when you power the pump...so....i would replace fuel pump relay(relay is weakest link in sensor/relay/pump chain of command,looking that the relay exists does not check its operation or circuit integrity,cheers stew
Hi again,just to clarify,overnite thought was thus,by remote powering of the pump you are bypassing not just the pump relay but the crank signal as well,therefore youre problem is ,the pump relay ,the crank signal/sensor,or both,cheers stew