04 burb stalls while stopping

[Shatcher0428]

Hey guys I have an 04 suburban and am completely puzzled. Occasionally during the week whenever I come to a complete stop the idle drops and it dies. It will immediately start back up but if I do not hit the gas will die again. It will even do it in neutral. Now in park it will remain running. This does it randomly and when I am driving 80% of time it runs great zero stalling. Engine has been rebuilt, new crank sensor and cam sensor, recently changed the coolant temp sensor due to failure and replaced pigtail at same time. After installation of new temp sensor is when I really started to noticed the stalling issue. Only engine code is Evap code. Any help would be great! Thanks!

 

[Fless]

Welcome to TYF.

A vacuum leak could cause a stall at low idle, also has the throttle body been cleaned lately? Is the IAC on the throttle body working correctly?

 

[Doubeleive]

pick up a fuel pressure tester (they are cheap) and monitor your fuel pressure

 

[PNWYukon]

Try to get some live data of the event, that will help narrow it down.

 

[RED TAHOE LS]

When was the fuel filter changed ?

 

[Shatcher0428]

I replaced throttle position sensor about 2 years ago, along with fuel pump, filter and regulator. Also has new mass air sensor. It is a flex fuel engine if that makes a difference. I didn’t think the 04 burn flex had an iac?

 

[PNWYukon]

What is the EVAP code number?

 

[Shatcher0428]

Do you know anything about the throttle control actuator? Could it be the culprit? I am thinking about replacing throttle body and getting new tca, the only code I am getting is a p0455

 

[PNWYukon]

P0455: Cracks, holes, or splits in EVAP hoses are typically the issue. Could be other things though. The EVAP issue should not cause your dying problems.

It's a 2004, then by all means change out the old parts, but without narrowing it down with some live data or a higher level scan tool, it will be a crap shoot.

P0455 Code: Large EVAP Leak (Causes and How to Fix) - Spire Car

Car Maintenance, General Repair, Trouble Shooting, and Everything Car Related

spirecar.com

 

[Doubeleive]

just because the fuel pump is only 2 years old doesn't rule it out.....it's one of the 1st things you want to check before just throwing money at it.