Your Onan 5500 generator's fuel pump chatter and dual light illumination indicates a control board communication error triggered by the remote harness connection. This comprehensive guide covers diagnosis, repair steps, and prevention strategies for all common Onan 5500 issues.
Key issue is only 3.3V at fuel pump relay trigger instead of 12V. This prevents relay activation. Trace the wire feeding relay pin 86 to find voltage drop. Check for bad connections, corroded grounds, or damaged wiring between power source and relay.
Your 1988 E350 Class C with 460 EFI has spark, fuel pressure, and timing but won't start even with ether - this points to either a faulty Mass Air Flow sensor, clogged injectors, or ECM failure. The fact that ether doesn't help is the key diagnostic clue here.
Generator surging is typically caused by a dirty carburetor, fuel system issues, or governor problems. Start by cleaning the carburetor and air filter, then check fuel quality and governor linkage.
For the Jamboree fridge, check LP gas flow, burner for debris, and 12V power. Ford 460 EFI conversion costs more than the RV is worth - maintain the carburetor instead.
Check inertia switch first on 1994 Ford 460 - this cuts fuel pump power after impact and has reset button. Usually on drivers side kick panel. Also check fuel pump relay by swapping with similar relay. Do not rely on jumper wire long-term.
Your 1989 Ford Tioga's 460 EFI system is experiencing classic symptoms of fuel pressure loss, likely due to a failing fuel pump or clogged pickup screen in the tank. The dead battery jump may have damaged the fuel pump relay circuit.
Roadside diesel filter change is possible but priming is tricky. Carry spare filters and priming pump. Know your engine priming procedure. Prevention through quality fuel and regular changes is better approach.
Your Onan 7000 generator fuel pump is receiving only 9V instead of the required 12V, causing starting issues. This voltage drop is typically caused by corroded connections, faulty control board, or wiring problems in the fuel pump circuit.
Your 2015 Bounder's Ford V10 crate engine symptoms point to incomplete engine installation/tuning issues, not transmission problems. The shop likely hasn't properly completed the crate engine setup.
No spark usually caused by crank sensor, ignition module, or coil failure. Test systematically from sensor to coil.
F53 no start - check if it cranks first. Cranks but no start usually fuel pump, crank sensor, or ignition module.
Onan 4KY that starts but stops when start switch released is usually oil pressure sensor failure. Check oil level first. Sensor can be bypassed temporarily by grounding wire but verify actual oil pressure.
When your 1998 Bounder Ford 550 cranks but won't start, the most likely culprits are ignition components (spark plugs, coil packs, crankshaft position sensor) or fuel delivery issues despite hearing the fuel pump run. Start by checking for spark at the plugs, then verify fuel pressure and quality.
When your Airxcel furnace doesn't respond to the thermostat, start by checking the 12V power supply, thermostat wiring connections, and propane supply. Most issues are electrical rather than propane-related.