Answer
May 21, 2025 - 01:10 AM
That warm start issue on the E250 CGI usually points to a few suspects. If it cranks fine but takes longer than usual to fire up when the engine's hot, it could be related to fuel pressure bleed-off, a faulty temperature sensor, or a weak crankshaft position sensor that acts up with heat.
I'd start by checking the fuel system (especially the fuel pressure regulator and injectors) for any signs of leakage or drop in pressure after shutoff. A failing coolant temp sensor can also send incorrect data to the ECU, messing with the air-fuel mix. And the crank sensor is a known troublemaker when warm; it can intermittently fail as it heats up, causing hard starts.
Fortunately, the manual will guide you through how to test all these components properly. Getting it means you won't be left in the dark. It includes step-by-step diagnostics, sensor resistance checks, and replacement procedures. Super handy if you’re planning to dig into it yourself.
