'86 2.3L EFI stalls after hot start

[Woodtroll]

Folks,

I have an '86 2.3 EFI that runs fine once warm, and starts fine from a cold engine at cooler ambient temperatures (say 50-60 degrees). However, when I start it up to leave work, when it is often 80-90 out, the engine stalls, stumbles, and might die a couple times if I have to let it idle. It runs a little weak until it warms up for a few minutes.

The idle control air valve (probably not the right term, but the valve at the air filter that increases the idle) works fine, as the truck idles up when started in cooler air.

There is no smoke, plugs look good, etc. I guess this is a sensor, but I don't know where to start.

Any help would be greatly appreciated!

Take care, Regan

 

[St Ranger]

I have the exact same problem

I've changed the fuel pumps egr valve fuel regulator throttle control relay on my 87 if i pour cold water on the in line fuel pump, it runs fine till it heats back up and it only does it after idle for any length of time. If you get a handle on this gimmie a scream and i'll do the same, i started a thread called hot fuel delivery problems but now i cant find it...still looking now