2005 f350 6.0 that sometimes starts.Problem seems to be getting worse as time goes on. It turns over good but won't run. If I leave it alone for a while It will start sometimes .
This is a diesel I assume.
Before anything else, you have to find out if it is a fuel delivery problem or a glow plug problem or, are your batteries tired? (Not cranking fast enough) Batteries have to be replaced every 3-5 years on a diesel.
1) Check your lift pump. It brings the fuel to the injection pump. It should make a buzzing noise when working. (You can feel the vibration if you put your hand on it.) It should buzz as soon as the key is turned to the on position without having to crank the engine.)
2) Check glow plugs. If the wait light only goes on for two seconds, then your glow plugs are burning out. (The wait light usually is on for at least ten seconds. Longer if it's really cold.)
3) Or the injection pump itself is weak. (Hopefully it's not this, as it can be very expensive to replace. We only want to do this as a last resort.)
Let me know
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