I need to know what can provoke the engine do not crank

Hello Kim,

Lurching and "impedeing" is not the most comprehensive
description I've ever heard.

That could describe everything including
wheels falling off... flat tires...
LOCKED UP CV-Joint... dried out oil-less manual transmissions .. to pistons sticking outside the engine block.

Perhaps you failed to pay a pile of parking tickets...
and have a wheel-lock attached? ((I'm just saying))

My best "ADVISE" would be to guide YOUR "lurching and impedeing" down to your first local muffler shop that offers FREE READING...

(FREE is a relative term) ... Have them READ your
DIAGNOSTIC TROUBLE CODES... For a good starting place.

It would be WISE to know the prices of some of your "PARTS"
before you go...

Or you could relate more relevant details... year, engine displacement, tranny type... Maintenance history and
POST a better question... provoking a better answer.

Hope I'm helping!

Carnac the Magnificent

Definitely an electrical problem. I guess an internal short to a bus communication wire or a short to ground. Have you had any damages recently? Or any major repairs that could have affected the wiring harness? Look for physical damage and try to bend/ twist/ manipulate the wiring to provoke the fault.

You actually can't advance or retard timing on your truck without pulling the timing gears off and manually doing it. however, if you adjust too far you can cause severe damage internal damage to your engine. and the computer is going to try to automatically adjust for whatever adjustment you make. If your question is provoked by a poorly timed engine, ie its running poorly, then i would suggest replacing your timing chain and I always replace the tensioner while i am there as it isn't the easiest thing to do. if you need to know the proper timing let me know.

If you do not know the location of the wastegate solenoid, how could you have properly tested it? Then, if you have not properly tested it, how could you possibly know that it actually needs to be replaced? - (just asking to provoke thought)

Hint: If you are getting a fault code that says "turbocharger wastegate solenoid control circuit" (like maybe a P0243), it would be wise to check the circuit before just throwing parts at the car...the solenoid might not be the problem.

With all that said, the answer to your question is that it is on the other end of the vacuum hose that goes to the waste gate valve - top rear of the engine above the left valve cover.

There are products to flush your engine at Auto parts stores. Your idea of cleaning it with diesel is good. But the diesel has to be left a few days to completely penetrate the engine parts. And it is done with the engine removed from the vehicle.
The manufactured engine flush has powerful ingredients to clean as much as can possibly be cleaned. I would recommend that . It also shows the instructions on how to do it right .

I don't know what engine you have, but all engines have timing marks on them. One on the crank will line up the engine to TDC on the number one piston, with the cover/s removed, you can see the cams aligned to their marks if the crank is on it's mark. A lot of cars use the same heads, cams on different engines, so they have more than one mark, when your crank is on TDC, the cam marks will be the ones you need. Either a diamond or a dot , or a slash. If your belt has broken and the engine ran for more than 2 seconds, take it to the junk yard, It will be shot. Hope this helps.

The crankshaft position sensor is located around the crank. Look for a stubby piece of plastic aimed at the edge of the crank pulley. The crank pulley is in central pulley which all the belts are ultimately driven from. It will be in the center-line & bottom of the front of the engine. Typically they are ~45deg off to a side. It's possible you may not be able to remove it without first removing the crank pulley.

That engine has 2 crank position sensors. One is near the starter and bolts to the engine block. The other is behind the crank pulley/balancer. I have to say I have not
replaced many of those. What makes you think it need replacement? Any codes stored you
know of?

NEED SOME MORE INFO... FIRST WHEN YOU TURN KEY TO THE RUN POSITION DOES THE CHECK ENGINE LIGHT LIGHT ON THE INSTRUMENT CLUSTER.. IF SO YOU KNOW YOUR COMPUTER IS POWERING UP... SECOND NEED TO KNOW WHAT IS MISSING...1...SPARK....FUEL OR INJECTION.. PULL ONE PLUG WIRE OFF COIL PACK HAVE SOME ONE CRANK CAR DO YOU SEE SPARK JUMPING ON COIL... SECOND SINCE YOU VERIFIED FUEL SYSTEM.. NEXT IS TO PLUG ONE PLUG AND SEE IF IT IS WET WITH GAS OR DRY LET ME KNOW AND I WILL HELP FURTHER

crank sensor is a component used in an internal combustion engine to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control ignition system timing and other engine parameters. Before electronic crank sensors were available, the distributor would have to be manually adjusted to a timing mark on the engine.

The crank sensor can be used in combination with a similar camshaft position sensor to monitor the relationship between the pistons and valves in the engine, which is particularly important in engines with variable valve timing. It is also commonly the primary source for the measurement of engine speed in revolutions per minute.

Crank sensors in engines are usually comprised of magnets and an inductive coil. They are principally based on the Hall effect. Common mounting locations include the main crank pulley, the flywheel, or occasionally on the crankshaft itself.

Some engines, such as GM's Premium V family utilise crank position sensors which read a reluctor ring integral to the Harmonic Balancer. This is a much more accurate method of determining the position of the crankshaft, and allows the computer to determine within a few degrees the exact position of the crankshaft (and thereby all connected components) at any given time.