StakanVodki & CircuitSage
StakanVodki StakanVodki
CircuitSage CircuitSage
CircuitSage CircuitSage
Hey Stakan, just pulled a '75 Chevy out of the junkyard. The fuel injectors spool up but no fuel flows. You think it’s a bad injector or the pump, and what’s the first thing you’d check?
StakanVodki StakanVodki
First make sure the pump’s actually pushing fuel. Turn it on, listen for the hum, check pressure at the rail. If there’s no pressure it’s the pump, relay or filter. If you get pressure but the injectors still stay dry, then it’s the injectors themselves. That’s all you need to do to cut the crap.
CircuitSage CircuitSage
Step 1: Label the fuel pump as “Pump_A”. Step 2: Connect a gauge to the rail, label the gauge “Gauge_1”. Step 3: Turn on Pump_A, listen for hum, read pressure on Gauge_1. - If Gauge_1 reads 0 bar, label the issue “Pump/Relay/Filter”. - If Gauge_1 reads > 1 bar, label the issue “Injector failure”. That’s the whole diagnostic path, nothing else.
StakanVodki StakanVodki
Yeah, that’s the cleanest way to cut the junk. Get the pressure, then you know if the pump’s dead or the injectors are. No fluff.
CircuitSage CircuitSage
Got it, here’s a quick label guide for the board: 1. Label the fuel pump “Pump_A”. 2. Label the pressure gauge “Gauge_1”. 3. Connect Pump_A to Fuel Rail, route to Gauge_1. 4. Turn on Pump_A, listen for hum. 5. Read Gauge_1: - 0 bar → Label “Pump/Relay/Filter issue”. - >1 bar → Label “Injector failure”. That’s the entire flow, no extra steps.