93 mazda 2600 glitch?

[Teoma]

The truck runs fine until the temps get up above 35C or in the 90's. It will be driving fine and all of a sudden it just loses power when I try to step on the gas. It usually idles ok but any attempt to up the revs meets with a situation that feels like I just turned the key off...any ideas?
I've tried getting the comp to diagnose it but all it said was that the o2 sensor was going. That was replaced but it still did it

 

[Hillyard]

The truck runs fine until the temps get up above 35C or in the 90's. It will be driving fine and all of a sudden it just loses power when I try to step on the gas. It usually idles ok but any attempt to up the revs meets with a situation that feels like I just turned the key off...any ideas?
I've tried getting the comp to diagnose it but all it said was that the o2 sensor was going. That was replaced but it still did it

What temps, the truck temp or the outside temp? Is it a 2300? When it dies can you start it right back up or does it stay off? Is it constant or just once in a while?

 

[Teoma]

when the outside temp rises into the 90's. It runs fine while it's cold but then just loses power. I'll be going along at 50 mph and if I try to step on the gas it sputters and then it just gradually gets worse until I am forced to pull over. It will usually idle but if I try to give it gas, it dies. I shut it off and let it sit for a few minutes and then I can usually get it to start up and run decent for a few minutes and then it starts again.
Oh yeah, sorry...it's a 93 2600i