99, 5.9l, wont start at -13f(-25c)

[Squeegee]

I have a 98' 2500 and have had this exact problem this winter and never had any problems like this at all with her in 10 years of proud service. I too thought it was the Battery and replaced it and it is still doing it, mostly on really cold days (-2). Pump was replaced a few years back, plugs, wires and cap as well. I will change the oil to 5-30w, fill-up the tank and hope for the best. Its just such an unpredictable problem that its hard to know what DID work. If anyone has a definite solution to this problem please post it as well. Thankd for the tips folks. - Squeegee

[wafrederick]

I believe it has a returnless system with no return line and no schrador valve.Some did have a schrador valve.There is no attachment to put a fuel pressure gauge on and it is the worst fuel system Chrysler thought of.

[jpb53]

TPS,Coolant sensor and map inputs should be checked. There is a TSB 18-36-98 that addresses this issue. Also cK fuel pressure. Possible plugged filter which are neglected on those Mopar part#4798825.

[Autopro1962]

Replacing your battery was a good start and make sure the cables ends are clean,here is couple things to look at,Inspect the Idle Air Control (IAC) pintle for sticking. If it is sticking, the Powertrain Control Module (PCM) can lose track of its position. If it is sticking, replace the IAC after cleaning the throttle body passages and throttle plate.

try Looking down the throttle body, with a flash light, for oil. If found, check the lower intake plenum gasket for leaks.I live in Iowa and its always really cold in the winter and people don't have that much problem starting up stuff even when they don't plug them in,there is something wrong with your truck.
It get -20F around here thats without the wind chill.

[rockwood84]

try cleaning the throttlebody and iac valve with some carb cleaner.