24V no start, Semi fixed need a solution.
So my friend has a 99 Freightliner tool truck dealio, which all the sudden died on him,
One shop put on a nice Fass lift pump ( factory one was dying i guess ? ) He winds up with a random no start, Next shop he went to, sold him a 2800$ VP pump, and he still winds up with the no start when hot. Then he finally calls me to help him ( i claim to know everything in the first place, so why not ? ) I run down the details with him, and tell him to unplug the lift pump, and see if it starts, calls me back and says " Yep sure does, shut the truck down, plugged it back in, and went back to a no start" So with the help of a Innocent bystander, it took some unplugging and starting, then re plugging in the LP. Long story short, If the VP has allready been replaced, Do i demand that they warranty the " Reman pump from canada " and make sure i get one with the updated diaphragm ? Or is there another trick in the book ? It's costing him 1000$'s and he wants this fixed ASAP ! Thanks Nick |
Does the lift pump run as soon as the key is turned on, if so, for how long? It should only run for half a second or so, just enough to push fuel into the pump, but not enough to pressurize it.
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If i'm not mistaken, it was wired to the factory setup, so i'm not sure if it's momentary prime or if it's constant.
I know my truck is setup for the momentary, or if i bump the key it'll hold for 20 seconds. Which makes me ask, why dose my truck start just fine with 20 second hold of 20 PSI ? |
Is the FASS wires into a relay, or directly to the lift pump connector. A FASS may pull too much amperage for the poor little controller to deliver, and change starting characteristics.
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Try this
Did this to mine and all is well.
( the second post ) https://www.dieselbombers.com/5-9l-2...lift-pump.html |
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