Engine Stalling Out?

Would Seafoam work?

Cleaned the throttle body and iac hole with choke Cleaner and it still is occasionally stalling but as often

OK will do that thank you

OK, I cleaned the throttle body, iac hole with carb Cleaner, then did the SeaFoam treatment through the intake, replaced the fuel filter, checked the relay noticed it was getting hot so I replaced the relay but now noticing the relay still gets hot so pretty sure the pigtail off the fuel pump is bad or the pump itself. Because it still is cutting out.

Same rig, 136k, and same conditions & symptoms. Swapped out the fuel pump relay and has been okay. MGARBZ885 - did you figure out if the problem was electrical or the fuel pump itself?

Was this ever solved? I am having the exact same issue with my 04

This did not solve the problem I am having. The car stalls at random times with no real rhyme or reason. I thought it was during hot days but I towed my camper with no problems then when going to get gas with no camper it stalled. It typically just quits at idle but if I am driving I can sometimes feel a slight bucking. If I try to immediate restart it behaves like I removed the idle air control harness while it was running.

No trouble codes, fuel pump and fuel pump harness replaced, MAP, MAF, ignition control switch, coolant temp sensor, new plugs and wires, new relays for fuel pump and ignition (they were hot but still seem hot with new ones), removed and cleaned throttle body and IAC hole, repaired frayed wires causing evap leak code and for ac pressure sensor, checked all fuses and cleaned contacts, new battery, 1 new cat, new downstream O2 sensors, new gas cap, new rear break lines, new bleeder screws all around (shop bled the lines with a tool), repaired broken wire under drivers seat for air bag in seat, repaired a previous owners hack job with the media center controller and checked all under hood vacuum lines using soapy water.

Not all those changes were a part of this issue but thats what I have done over the last month. I have also had this to a mechanic I trust and he cant find the issue. Its only stalled once when he had it so the intermittent issue is a pain.

Things that I know are left are a small manifold leak, needs new brakes and rotors all around and lower drivers side controller arm is slightly bent and rusted.

The random stalling issue is my biggest concern right now. I know I gave too much information but I figured too much was better than not enough.

Thanks in advance!

I have removed the throttle body and fully cleaned everything and replaced the gasket. When car is at an idle if I remove the IAC wiring harness the engine runs very rough. Based on that I assumed the throttle was functioning properly. I cant replace the IAC as it is pop riveted into the throttle housing so its not serviceable. I also checked the vacuum line from the throttle to the valve cover and there was no leaks.

How else can I test for lean throttle?

Fuel pressure is consistently at 55 to 58 psi. Also have a new fuel pump, fuel pump relay and fuel pump wiring harness.

I did post a new question first and it is located here, https://www.2carpros.com/questions/truck-stalling-out. I queried this post because the issue was similar.I did receive a response on this one and will be replacing the crank position sensor.

thanks for the help.

Yes got it figured out fuel pump would lose all pressure right before the engine would stall, replaced the fuel pump and also the crankshaft position sensor haven't had any issues since

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

My truck is stalling out at random times without any rhyme or reason. Fuel pump has been replaced and some wiring under the battery plate fixed from being frayed. When stalling I have measured a consistent 58 psi so I do not believe it is with the fuel system unless it is after the fact at the injectors. One thing I do notice is the check engine light does not come on when I cycle the key to the position just before starting. I believe that is telling me the PCM is not going through its initial startup sequence.

I have also had a couple problems where I cannot shift the car from park and that usually fixes itself quickly by cycling the key on and off.

Is it possible the ignition switch is causing communication issues with the PCM circuit? If not any other ideas?

I do not have any active or pending check engine codes.

Appreciate any help. Thanks!