Hello again,

For the last two years my 91 240 had been stalling when the
temperature was 92 degrees or higher. Yesterday the temperature
reached 75 and I began to feel the stalls coming on, but I
was close to home and limped home (about 3 blocks). This afternoon
again it was in the 70's and she began to stall out. I limped
home with my fingers crossed (about 5 blocks. Recently my main
fuel pump has been sounding different and louder than normal.

I jumped both fuel pumps and only the main comes on.
Fuse 4 and 6, #4 fuse removed, left side to left side ran main and
left of six to right of 4 and nothing happened. Sounds like the in-tank
pump needs to be replaced.

After the Hot Stall today the codes were 2-1-2, 2-3-2 and 2-1-2.

I applied heat sink to the ignition module last year with no positive results.
I also replaced the Engine Speed Sensor/Impulse Sensor last year.
The coil seems to be original, could this be my problem?
Could the oxygen sensor failure cause these hot stalls?
Maybe replace the ignition module?

When the temperature is lower she runs just fine and dandy.

Does the fuel pump relay control both fuel pumps?

First thing I will check will be the in-tank pump on Wed. morning.

Any and all advice is appreciated,

Joseph in the New Mexico