Engine Stall

[MuddyWater]

How's it runnin folks!

Just recently finished up a holiday trip this past Saturday, the 24th (800Mi). While on the way home (50mi out) sitting in holiday traffic coasting/idling doing approximately 5-10MPH, when suddenly all the dash indicator lights came on as if when you first start your truck; STALLED. Quickly shifted it into neutral and it fired right back up with no warning/check-engine light. Drove the remaining distance without a hitch. Fast forward to today, driving again under the same circumstances (5-10MPH, coasting/idling in drive) and again all the lights come on... stalled and again shift into neutral and it fires right back up. No check engine or other sign of fault, drove the rest of the distance home without a hiccup. So now, I am seeking the wisdom and experiences of those in this vast seafoam of knowledge. Based on my initial search under the 3rd gen threads and searching via "Engine Stalls", I have not found an exact replication of my experience, but similar. Prior to this happening, I have been experiencing the prolonged crank/start with my truck, which leads me to beleive it very well may be my fuel pump trying to warn me that its about to go or its my IAC (Idle.Air.Control). If anyone knows of a direct link with a solution dilemma or has personally experienced this exact same issue and successfully diagnosed and resolved it, please advise. Otherwise, I'm going to conclude it's the fuel pump and just swap it out before it goes FUBAR on me in the middle of nowhere.

Thanks to all in advance for the input/feedback.

Happy, Happy, Happy Freakin Holidays!
:biggrin2:

 

[techno]

Have you done any basic maintenance items since or recently? If not, then I recommend you start with the basics that can affect the air/fuel system, air filter, clean the MAF, injector cleaner, clean the throttle body.
You mentioned seafoam, this is a good idea too.
Replace your fuel filter before you do the pump, unless of course the pump fails an inspection test.
Inspect the spark plugs and test the cables and coils.

 

[nissanh]

Have you replaced the fuel filter recently. when you run at low MPH, the alternator produces less current like 12.9 V so this might be not enough to power the pump to overcome the clogs in the fuel filter. At high speeds/revs the alternator will produce like about 14 V and the fuel pump has enough power to overcome the clogs in the fuel filter.

You might also want to try fuel injector cleaner. I think the problem is related to fuel/Air

 

[MuddyWater]

Have you done any basic maintenance items since or recently? If not, then I recommend you start with the basics that can affect the air/fuel system, air filter, clean the MAF, injector cleaner, clean the throttle body.
You mentioned seafoam, this is a good idea too.
Replace your fuel filter before you do the pump, unless of course the pump fails an inspection test.
Inspect the spark plugs and test the cables and coils.

Yes, purchased in back in September of this year and have completed all the basic maintenance and then some. Right before taking the 800mi trip I changed the oil and filter and before that...

DeckPlate Mod - don't believe this would have an affect.
Trans Cooler Mod - " "
Trans Service Completed - " "
Differential Service Completed - " "
Tune-Up - Went with NGK wires - CHECK
Replaced Valve Cover Gaskets - CHECK
Installed new fuel filter (OEM) - CHECK
Seafoamed the fuel tank, but not crankcase and EFI. - 1 OF 3
Sprayed/Cleaned the MAF with CRC MAF Cleaner - CHECK

 

[MuddyWater]

Have you replaced the fuel filter recently. when you run at low MPH, the alternator produces less current like 12.9 V so this might be not enough to power the pump to overcome the clogs in the fuel filter. At high speeds/revs the alternator will produce like about 14 V and the fuel pump has enough power to overcome the clogs in the fuel filter.

You might also want to try fuel injector cleaner. I think the problem is related to fuel/Air

New fuel filter; check. Due to the extended/hard starts, and now starting to stall without fault, then there is a good possibility that my fuel pump is going out. Yes? Currently I've put 115K on the asphalt. What I may do, is take it to the shop to have its palm read (codes). I was told that even though a check engine light does not initiate, that codes may still be generated. Can you confirm?

 

[nissanh]

You started having this problem after the new fuel filter?
Have you checked the fuel pressure regulator or any pressure leaks in the fuel line?

Toyota fuel (DC motors) last a lift time.

 

[MuddyWater]

I have not checked the fuel pressure regulator or any pressure leaks in the fuel line. However I went ahead and had the new Denso fuel pump installed. I've been driving the truck for about 3 weeks and so far, it has not stalled, so I assume that it fixed the problem, however I still am experiencing the prolonged start times. So with that being said, I will do as you suggest and check the fuel pressure regulator and any corresponding pressure leaks. At least, I have piece of mind knowing I have a brand new fuel pump which is one less thing to be concerned about when traveling off the beaten path. Thanks to all for the useful input.
:biggrin2:

 

[Jared Pabis]

Same thing happened to me a few weeks ago. It would not idle on its own, but would stay running if you were on the throttle.

I pulled the throttle body and discovered that the IAC valve was stuck closed from carbon build up. I cleaned it with carb cleaner then lubed the moving parts with Tri-Flow. Fixed the problem.

Let me know if you need more details on how to service the IAC valve.

 

[Drcoffee]

Sudden quitting would point me o the MAF or crank position sensor. The long starts would suggest fuel pump or crank position sensor.

 

[Jared Pabis]

Sudden quitting would point me o the MAF or crank position sensor. The long starts would suggest fuel pump or crank position sensor.

Very good points. I think he mentioned that no code was produced by the OBD which would rule out a sensor for the most part.

When the same thing happened to my 4Runner, I explored all possibilities, but everything pointed to the IAC valve. The engine ran fine at 1,000+ RPM's which means the fuel pump was working, and the timing was on.

PCV could be clogged as well.