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ASD relay ! Is there B+ voltage to the coil's ? Fuel pump relay electrical circuit diagnostic's . Do you have an know how to test with a DVOM digital volt ohm meter ? You can check out wiring diagrams at http://bbbind.com/free_tsb.html ! The ASD - auto shut down relay power's up the fuel pump relay , ignition system an some other thing's . It's in the under hood fuse box !
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check the compresion in all cylinders 100 psi (compression good) check the spark -check the fuel pressure.30 psi at gauge with switch on.(if no keep pressure with switch off injectors or fuel pressure regulator are bad
check the signal to the injectors (get little injectors tester at autoparts) if no signal check the ground to the injectors black wire
or the other wire (computer)= good signal to injectors and good fuel pressure and good spark (defective injectors)
Check for spark , probably a crank sensor problem . Check videos on youtube on test crank sensor . Some sensor is breaking down when it gets warmed up .
That would be may first guess; the next being gummed injectors for the same reason. Get a can of starter fluid and spray dome into the throttle body while cranking the engine. If the engine fires and then dies, you can be somewhat assured that your problem is fuel or fuel delivery system related. If it doesn't fire on the starting fluid, then you need to check for spark and possibly compression problems.
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https://www.youtube.com/watch?v=a-rfAd0YLg0
Jun 29, 2014 - Uploaded by AJ Pierce
In this video, I will show you how I fixed my 1992 Dodge Dakotanot starting. ... Engine cranks but won't start - Duration: 18:30. jimthecarguy ...
Engine Will Not Start Due to Blown Door Lock Fuse on Dodge Dakota ... cap and rotor, wires, plugs, coil, fuel pump assy, coil pickup sensor, crank position sensor and have new ECM on the way, Cranks but won't fire. ... 1990 Dodge Dakota.
Jan 22, 2009 - have a 1993 dodge dakota sport that wont start. when you turn the key on there is no power to the fuel pump and does not fire. any ideas ... I just bought a1990 Dodge Dakota Sport 4x4 5-Speed, there is only one problem, it only .... I went to move it the other day, it would turn over, but had no spark or gas.
Always check for spark at the coil first,than see if its going to the spark plugs, I have had bad crank sensor and truck still started.But did you do a scan,get it scaned and see what codes it shows.
Do you have spark? Do you have fuel? Which are you missing? TIP.A quick check for spark.........give it a spray of starting fluid....if it runs....you've got spark. No spark usually means......a bad coil or ignition module on the 3.9. No fuel is usually caused by a bad fuel pump.
a bad crank sensor or dist pickup plate can cause this.... check the fuses in the fuse block under the hood for any blown ..... a bad auto shut down relay may cause it .....try putting a test light on the green and orange wire and see if it lights up when you try to crank it
You need to follow a detailed troubleshooting procedure in a repair manual.
Check for spark plug fire during cranking after it dies.
No spark = ignition problem= computer will not fire injectors, and possibly cut out pump also.
Good spark = pump wonky, or power to pump system.
Also, other quick tests... when the thing dies, and then you crank,
1) Thump the fuel pump in the tank, if you can. A bad fuel pump might start up again.
2) Shoot some ether carb cleaner in the TB. If it only fires off the ether, the ignition system is no longer suspect.
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