My friends 1992 245 has had some issues after driving up a steep driveway.
It started to idle in pulses and sometimes will stall the engine.
The simple tests we have done were:
-Pull fuel pump and check internal hoses for visible damage.
-Spray brake cleaner on intake to check for leaks
-Unplug MAF to check if the issue goes away.
Not a ton of luck with any of those, but the fact that it started when it went up an incline makes us think it is fluid related.
Here is a reference video with the MAF being unplugged. The pulsing reduces when the MAF is unplugged.