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99 durango 5.2 slt: The fuel relays clicks repeatedly when the ignition is turned on, the fuel pump is running, I checked the fuel at the rail and depressing the valve stem I do get fuel. The other key that the truck wont start is that the fuel gauge doesnt read it has fuel although I know there is a half tank of gas in the tank. When these two thing occur the truck will crank but will not start occasionally the relay wont click and the gauge will work the truck will start and run flawlessly.
I have replaced the map sensor, the TPS sensor and the person that had it before me said the replace the IAC sensor and the fuel pump. I have also replaced the spark plugs the plug wires and I will be putting a new distributor and rotor. I have ordered a new crankshaft sensor I should get it sometime this week. The battery is also new... I have wiggled wires and looked for a loose ground and I cannot for the life of me figure out what is wrong.
 

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Check fault codes, first, always.

http://www.allpar.com/fix/codes/index.html

If you're sure that there is enough fuel, then disregard the fuel gauge not reading and focus on what prevents it from starting.

When you say the "fuel relays clicks repeatedly when the ignition is turned on", do you mean it clicks once each time the key is turned to ON, or that it chatters repeatedly when turned each time to ON? If the latter, then there is not enough power being supplied by the battery, whether a bad ground, terminals dirty, or failing battery.

For most MoPars, the fuel pump relay is cascaded in series with the ASD relay. This means that the fuel pump relay coil is energized by the LOAD side of the ASD relay when the ASD relay closes. So if the fuel pump relay won't always close, and you can crank but not start, the ASD relay may not be closing reliably.

But check the fault codes first and report back. And Welcome to Allpar!
 

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dankbud187 said:
99 durango 5.2 slt: The fuel relays clicks repeatedly when the ignition is turned on. When these two thing occur the truck will crank but will not start occasionally the relay wont click and the gauge will work the truck will start and run flawlessly.
Are you 100% positive its the fuel pump relay and not the ASD relay? You can replace sensors forever and never cure the problem if theres a broken or corroded wire.

I had a very similar problem with my fuel pump/fuel guage recently on my Ram and it turned out to be a broken wire harness/bad connector at the fuel pump. Unplug the fuel pump and check to see if your getting voltage(and ground works) down there where your supposed to consistantly, also check that harness going along the frame the and look for anywhere it might be damaged or broken ground in the vicinity.

Might be as simple as the previous owner replaced the connector at the fuel pump and its got a weak or corroded contact now and I would definately look at that 1st with your fuel gauge not working.. theres likely a problem in that harness somewhere. Theres usually enough room to get your hand in there and unplug the connector and pull it out far enough for inspection, be sure to look close at the wire insulation.

If something is tripping your ASD relay it will also shut down your fuel pump and coils, but your gas guage will continue to work. (Example)If the computer doesnt recieve signal from your crank pos sensor for about a second anytime from the time you start cranking, it will trip your ASD and youll get no fuel or spark.
 

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Welcome to Allpar. The fuel gauge signal is carried to the PCM from the tank sender on a dark blue wire, from there to the cluster gauge is over the CCD communications bus. The gauge is not hardwired. If the sender ground was bad, the fuel gauge would read overfull.
If the fuel pump relay is clicking as well, I suspect a wiring problem (high resistance) under the hood. Maybe near the battery where corrosion can take place and underneath the nearby PDC (fuse/relay box) where corrosion can hide and fester. PCM connectors and body grounds can also corrode. If the PCM has a voltage drop, the relay can cycle repeatedly and the PCM communications bus will go down causing both of your issues.
There may be no fault codes.
You may want to consider looking for a factory service manual before buying more parts. Sometimes the larger libraries have these: http://compare.ebay.com/like/270899948591?var=lv
 
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