Hello all, sorry in advanced for the long post. My 1998 4Runner has around 260K and she runs perfect except an occasional stall, once or twice a month. So here are the details, it always happens at a slow crawl or barely given a little gas, I mean barely then I release the gas. It happens without warning, no other symptoms i.e. drop in RPMs, hesitation, etc. When it happens all i see are the dash lights lit up. I drop it in neutral and she starts up no problem, then I drive away. The only other observation is it happens more often on warmer days, never when it's cold and shortly after I get off the freeway, I don't know if these things are relevant, just throwing it out there. BTW, no CEL Codes.

Ok, like a good forum member I searched far and wide and I could not find anything with exactly my issues. Based on my search and research, here are the things I have done. Thinking I have resolved the problem it happened again yesterday:

-Cleaned throttle body (Deep Creep)
-Cleaned MAF (MAF Cleaner)
-Replaced all vacuum hoses (silicone)
-Checked for vacuum leaks (solid 20 in.Hg at idle)
-Cleaned IAC Valve (Deep Creep)
-Replaced both 02 sensors (OEM Toyota)
-Replaced TPS (OEM Toyota)
-Reset ECU (Disconnected battery)
-Replaced spark plugs (OEM Toyota)
-Replaced spark plug wires (OEM Toyota)
-Replaced fuel filter (OEM Toyota)

I can't think of anything else, I'm stumped! The only thing I can think of it actually replacing the IAC valve or fuel pump, however I don't have any of the associated symptoms with those being bad. Other than that, my rig runs FLAWLESS...like a new car, idles perfect, no putting or hesitation what so ever when I floor it. I have Torque Pro with my OBDII Blutooth scan tool and my LTFT sits at 5% with STFT between -2% to 2%.

Thanks guys!

-Danny