Stalls after warming up.

Hi everyone. New to forum. I've dropped in before just to search for troubleshooting ideas and have been pretty successful. Thanks for that. My current issue has me stumped.

I have a 1995 Toyota Tacoma Ext cab 4WD with 220000 mi on a 3RZ-FE 2.7l. I made a few short drives the other day. On the last stop the truck started but then immediately stalled. I couldn’t get it started for a while but finally got it going. Truck had severe loss of power and re-stalled upon reaching a stop light. Next day truck fired right up, but started to miss after warming up for a while and eventually stalls. If I give it gas when it starts to stall, it avoids stalling but does when I let up on the pedal.



I’ve changed plugs and wires, cap and rotor, PCV, Idle up valve, and cleaned the throttle body. I checked the IAC & TPS both were fine. Looked at MAF. Wires are clean and intact.



Replaced exhaust manifold(due to cracks) and O2 sensors about a year ago.



Recently, I removed the fuel injectors, had them calibrated and re-installed. Regulator seemed fine. Afterwards truck started and ran fine until warming up then stalls. Same issue. No codes turn up and I’m at a loss as to what could be wrong.


I had same problem a few months ago but it suddenly started running fine. Problem was resolved after working on the previously mentioned items. But not right away because at first I still had the same issue. The last time, I found a vacuum leak at the idle up valve. I can’t find one this time.


Any thoughts?

Thanks.