First of all; Merry Christmas to all...

So now for the problem... I have a manual '90 740 turbo with 210k on the clock. Seems to run well, but when RPM's get over 2500 the low oil pressure warning light has been flickering on and off. When I let off the accelerator and slow down the engine RPM's the light will stop flickering and go off. This has only happened a few times, but would rather get this figured out sooner rather than later. Any ideas on what this could be would be greatly appreciated. I have about a 100 mile trip tomorrow and would rather not seize the engine if possible.. Thanks

I have an '87 740GLE wagon with over 325K and the oil light has been flickering for at least the last 100K. Wire insulation in the eng. comp. sucked big time -crumbling to the touch. Check the insulation along the length of the oil sensor sending wire. Is there any bare wire? If so, is it capable of touching any nearby bare metal when the car is running, vibrating, bouncing, etc? This unintentional grounding could be causing an seeemingly erratic flickering Alternatively, the oil pump could be failing (not real likely) or maybe you're just low on oil.

I've had this car for about 15 years but that doesn't qualify me as a volvo technician, so please don't rely too heavily on my suggestions. To the numerous posters on this forum with much more experience than I, please don't hesitate to take me to task for bad advice if I am guilty of such.
cheers.