Oil light flickers at idle in gear 1983 cadillac devill 4.1

Go to auto zone to check is free.

Under the dash.

Most likely your sensor is too sensitive and detects the low oil pressure that exists in idle .... you oil pump is not functioning fully and at idle fails to produce the right pressure. Lastly,your idle could be set too low. try increasing the idle slightly (you don't want it too high) and see if that solves the flickering light problem

check your oil pressure switch its probably has oil inside the connector clean it out and replace your oil pressure switch

u could plumb in a direct oil pressuer gauge 2 the mtr but it sounds like u may have excessive clearance in the main crank shalt bearings

Disconnect the battery for 15 minutes and hook it back up that should reset any lights on the dash because it resets the computer. If the oil light stays on, you might have low oil or maybe even a faulty oil sending unit that is tell the computer there is no oil when there is oil.

add some fresh fuel

with a 2002 Concord 3.5 V-6, what should the rpm be at 60mph? 70 mph?

I'm not sure if the overdrive gear is lost in the tranny, but the transmission light is on.

Thanks

http://en.allexperts.com/q/Cadillac-Repair-806/1983-Cadillac-Deville-ECM.htm follow this link. I think this might help.