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Discussion Starter · #1 ·
Truck ran fine now having a crank but no start no tach. Put 12v and ground to vp and fires right up. Checked vp plug I have everything needed. Checked data link at vp plug and have 2.5v on each wire. Please help
 

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Welcome to the forums, there's lots of good information here.
Pull codes with a good scanner.
Fill out your sig, please, and let us know which truck you have.
Year, transmission, 4x4, chipped, other aftermarket upgrades, that sort of thing
 

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Discussion Starter · #4 ·
Welcome to the forums, there's lots of good information here.
Pull codes with a good scanner.
Fill out your sig, please, and let us know which truck you have.
Year, transmission, 4x4, chipped, other aftermarket upgrades, that sort of thing
2000 dodge ram 2500 automatic transmission stock. No codes. Done blue chip diagnostics. Truck will run if you disconnect the data link wires from vp. I have replaced ecm crank sensor cam sensor.
 

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Does the WTS light come on every time you turn the key?
 

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Did you follow the rest of the test?

IF YOU HAVE FUEL, POWER AND GROUND, PROVEN BY THE ABOVE TESTS AND STILL HAVE NO START AFTER TEST 3, YOU ABSOLUTELY POSITIVELY NEED AN INJECTION PUMP!
If you want more proof, or really want to know WHY it won’t start, loosen all of the injector lines at the valve cover. Crank the engine for 30 seconds, and if fuel comes out of only one line, better than the others, this indicates a seized rotor, and the engine will never run again until you change the VP44, because only one cylinder is getting fuel. For the engine to start you need HIGH PRESSURE fuel, AND NOT AIR, to POP OFF at least three of the injectors. If you have only a feeble fuel flow from the open lines, you are looking at only Lift Pump pressure, and the engine will never start. To determine if it is or is not HIGH pressure, look for a puddle on the ground after 60 seconds of cranking. No puddle, no high pressure. If high pressure fuel doesn’t come out of the open lines when cranking, the solenoid pintle valve may be stuck, or the pistons may be stuck compressed in the rotor, due to fuel contamination or corrosion. Low pressure can also be caused by an electrical issue in the computer, where the computer doesn’t energize and close the fuel solenoid to make high pressure, so low fuel pressure going through the injector lines is WHY the engine won’t start. Any of these situations confirms that the engine will not start until you replace the VP44, as long as you have done the other tests above.
 

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Truck ran fine now having a crank but no start no tach. Put 12v and ground to vp and fires right up. Checked vp plug I have everything needed. Checked data link at vp plug and have 2.5v on each wire. Please help
I have an 06 dodge ram 3500 5.9 Cummins. I've had electrical problems with it twice. Both times was alternator/batteries needed replaced.
 

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Agreed.

How's the electrical? All wiring, harnesses, grounds, cables, connections present, in good condition, secure and free from corrosion and damage? Test batteries out of the truck separately. If one is bad, replace both.
Just to confirm... WTS light comes on immediately? (apologies... forgot to specify immediately earlier)
This all might be part of the blue chip diag... I can't remember.

I don't suppose someone thought it might be a good idea to de-grease the engine... ?
 

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Discussion Starter · #10 ·
Agreed.

How's the electrical? All wiring, harnesses, grounds, cables, connections present, in good condition, secure and free from corrosion and damage? Test batteries out of the truck separately. If one is bad, replace both.
Just to confirm... WTS light comes on immediately? (apologies... forgot to specify immediately earlier)
This all might be part of the blue chip diag... I can't remember.

I don't suppose someone thought it might be a good idea to de-grease the engine... ?
Wts come on immediately checking all wires now seem to be good no engine was not degreased.
 

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Discussion Starter · #11 ·
Wts come on immediately checking all wires now seem to be good no engine was not degreased.
Wts come on immediately checking all wires now seem to be good no engine was not degreased.
Can anyone tell me since it runs when you disconnect the data link at the pump that the pum is good? Or could I still have something going on in the vp itself?
 

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Did you read the Blue Chip Paragraph?
That is the point of the Hotwire test .
If you go through the whole step-by-step process you will know more than most people on here.
 

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This may help. Possible computer is shutting it down due to this.

 
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Discussion Starter · #15 ·
This may help. Possible computer is shutting it down due to this.

 

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Sorry can not read that, especially sideways.
 

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No help. Turn before posting, maybe then
 
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