Check for a crankshaft position sensor circuit being open, or the crankshaft position sensor is bad.
Try to spray starting fluid into the intake of the engine, and then if it starts for a few seconds, then it's a bad fuel delivery problem like a fuel pump or clogged fuel filter.
If the glow plugs aren't working then the Diesel won't fire up.
How old is the Diesel in the truck? Is it out of season?
Crankshaft Position (CP) Sensor
OPERATION
The CP sensor is mounted on the right front of some V8 engines, is a variable reluctance sensor triggered by a trigger pulse wheel (36 minus 1 tooth). Its purpose is to provide the PCM with an accurate ignition timing reference (when the piston reaches 10 degrees BTDC) and injector operation information (twice each crankshaft revolution). The crankshaft vibration damper is fitted with a 4 lobe pulse ring. As the crankshaft rotates, the pulse ring lobes interrupt the magnetic field at the tip of the CP sensor.
TESTING -crankshaft position sensor
Using DVOM on the AC scale and set to monitor less than 5V, measure voltage between the sensor Cylinder Identification (CID) terminal and ground. The sensor is okay if the voltage reading varies more than 0.1V AC with the engine running at varying RPM.
Are there any codes associated with the no start condition?
DO NOT EVER spray starting fluid into a Diesel engine's intake!!! This could be catastrophic to the engine. There is no "Ignition" timing for a diesel. It detonates the fuel based on heat from extremely high pressure as soon as the fuel is injected. If this is happening in cold weather (like below 40 degrees), first check the glow plug relay, then glow plugs. Otherwise it is likely an injector /pump problem.
I stand corrected on the diesel spraying starter fluid into the intake:
I read the following post about it on the following forum:
http://www.thedieselstop.com/forums/f30/...
where the poster said the following:
Yeah, you can really do some serious damage to these engines with starter fluid. A bunch of years ago, I looked at a truck a buddy had and he used to shoot it to get it going in the morning. I guess once he got a little too happy with the starter fluid and bent 3 rods in the bottom end and had one cracked piston. After I got my hands on it, I found 7 bad glowplugs, but it was a little too late. $4000.00 later and the truck ran like normal again.
If I were you, I would find out whats going on with the glowplug system before going anywhere near it again with the "can of death".
The GP system is super easy to troubleshoot with a multimeter and basic hand tools. Do yourself a search and you'll find thousands of posts on the subject. Your sig says you already put in new plugs. What brand were they? It sounds to me like the controller may not be working right. Any more info on what you've done so far would help.
You've been warned
Thanks for the post.
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