Volvo 940 stalling problems

[Stevecym]

Hello. I came on here some months back. I have a 95 940 base model that stalls like 20 minutes after start up. I have changed too many things that i care to discuss. I want to ask readers several questions:

The car stalls like clock work.

1. How long does "safe mode" last?

2. Is there any way to get the car to remain in "safe" mode?

3. When the car stalls, it lugs as if the alternator is overloaded. So at one point i hooked another car up to the battery via cables. When it went to stall, it lugged and took off again. Could this be happening as it is leaving safe mode and could something be starting that is overloading or shorting the system intermittantly?

I really just need to get this car running for now. It is not a daily driver. I have no time to spend trying to analyze this. I put the engine in a couple years back and it ran great then this happen. I have changed rear fuel pump, filter, alternator, cleaned tb, disconnect and ran without iac.

My main question is : what happens at 20 minutes and what can i do to by pass that or keep car in safe mode.

Thank you.