2004 hemi ram hard to start warm

[flyinlow]

Engine starts quickly when cold. Runs great. When warmed up and you go back out to drive after it has sat for 10 mins or more it has to be cranked for several seconds to start, then runs fine. Sometimes you have to push the accelerator down to get it to start. No check engine light, tried different gas and fuel system cleaner. 95K on the truck.  Ideas?

[Silver R/T]

It's probably something simple. Does it have distributor, check cap. IAT sensor, coolant sensor

[B5charger]

I'd say to check the throttle body and clean it.  Make sure not to touch the throttle position sensor and give the pivots where the butterfly valve rotates a good cleaning.  Had the same problem with mine a couple of winters ago, and now I make this part of my winter prep for the truck.

[Cooter]

Will need to look at the Lamda data on a scanner to confirm, but appears to be something dropping out when warm. Have you done ANYTHING about a typical, maintenance tune-up? Like plugs, air filter?

You would not believe how many cars i see that the owners evidently expect spark plugs(Even the platnum ones don't go forever), should last at least 300K miles, and forget about a fuel filter...Although, I think the Dodge is in the tank...

[flyinlow]

Thanks for the ideas.

No distributor, multicoil, two plugs per cylinder.

Changed airfilter. Fuel filter is a screen built into the bottpm of the pump assembly. Have not removed,considered that, but it makes normal power at WOT so I would think the pump is delivering enough fuel..

Plugs are coming up on there first sceduled change.

Engine fires instantly on a cold start and runs perfect once started. Its just need s to be cranked for 5-10 seconds somtimes when its warmed up,then runs fine.

I bought some throttle body cleaner and will try that. It has an electronic throttle.

[Todd Wilson]

Idle Air Control motor or a leaky injector..................



Todd

[red69superbee]

sometimes a leaky injector will do that, works fine when cold because it needs the extra fuel, but is flooded when warm.Fixed a grand am recently that had 5 of them leaking.Took them all out with them on the rail, unhooked the wires going to the injector and turned the key on so the fuel pump would run and then look at the tips of the injector to see if one is wet or dripping fuel

[John_Kunkel]

Find the fuel pressure test port and check to see if the fuel pressure drops off rapidly after engine shutdown, if it does the check valve in the fuel tank pump module is bad. When this happens the "wrist twist" trick will often work, turn the key from Off to On (not Start) at one second intervals several times to pressurize the fuel line. It should then start right up.