I have a 05 ford diesel and it will crank hard but will not start. where do i start looking for the problem.

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Diesel Trouble Shooting - Flashoffroad

www.flashoffroad.com/Diesel/troubleshoot/troubleshoot.htm
Apr 22, 2003 - Trouble shooting the GM 6.5 diesel engine in Hummers and GM trucks.... and the crankshaft position sensor that will cause a hard or no start condition. ... a pin hole in the system between the tank's pickup and the fuel pump. ... I had a highspeed (60 mph) surge on a 99 td where the rpm would jump up and ...Missing: dutro ‎so5c

Light-Duty Diesel Diagnosis - Auto Diagnosis Repair Help

www.aa1car.com/library/diesel.htm
That's why diesels continue to be a popular option in many pickup trucks ... by the cold oil can reduce cranking speed to the point where the engine may not ... Problems in any of these areas can make any engine hard to start. ... If slow cranking isn't the problem, perhaps there's something wrong with the .... Need Help Now?

05 international 4300 series power problem - Diesel Mechanic Jo

if the engine will crank and not start, look at the exhaust while the engine is cranking. if you do not see black smoke from the exhaust pipe the engine is not getting fuel. this would be an issue with the injection pump. if there is smoke the no start is most likey a compression problem. diesel requires heat and compression to fire.

Have you checked the glowplug relay.

Swap out the crank and cam sensors

if it has a cam belt it sounds like it has snapped ....hope not ..... or your ring gear could of gone:(

when you get a code the PCM will keep that code and till it get easased. you need a scaner or disconect your battery for 1h. this should clear your codes. when the battery is disconected don't sit in your can. the air bags may deploy if you hit the steering collem or a sensor to hard. just let it sit. reatach your battery then try to start your truck. if the codes are still pressent you make need let the car sit for longer or bit the big one and get the shop to do it.

how much oil press? needs at least 500 to start, also make sure your oils not low and it's 15w40

dies the truck restart once it cools off? it is very common for th 6.0 to have high pressure oil issues on a hot soak. they will run till the cows come home but once shut off they can not build up enough pressure by cranking speed alone to start truck until it cools down and the seals become rigid enough to bridge the gaps they are sealing in the first please. if this is the case. it may be the STC fitting ojn the back of the high pressure oil pump (intake and turbos must be removed to check) or possibly the branch tube o rings have worn. the branch tubes are located under the valve covers and supply the fuel injectors the oil they need to perform their "power stroke"...

It is possible that some of the glow plugs might not be working. This will cause a hard start and smoking condition especially in cold weather.

Need to check that glow plugs are working to spec and getting good power source