I got my 91 LS400 put back together but the oil light is flickering on and off. Let me attempt to describe the situation.
I start the car, and it idles just fine, no oil light (oil light will not come on if I do not rev the engine, it idled for about 25 minutes yesterday while i was filling it up with coolant), if I then rev it up a little, when the RPMs come back down the light flickers on....I then rev it up and the light goes off, but when the RPM's settle again it flickers on and stays on. It's like the oil light will not come on until I rev it up, and then it stays on at a higher RPM (higher than idle) but turns off when I rev it....This pattern repeats itself until the oil light stays on for any RPM under about 2500. I can put it in neutral and turn the car off, then back on, and the light goes back off for the first few minutes and the pattern starts over. It's like i am re-setting the electrical system.....This leads me to believe it is an electrical problem, because i will only kill the engine for about 1 second. The Cam seal was blown out, and spewing oil prior to replacement, so I know I have oil pressure (i replaced the seals), also the engine is very quiet and smooth. I guess my question is, has anyone ever had a similar problem, and is there a way to check the Oil pressure sending unit? It is the Red oil light in the middle of the Tach/Speedo, not the orange one below...not sure if that makes any difference, but I noticed 2 oil lights. Any suggestions are much appreciated.
Grayson