Get an oil pressure test kit
http://www.amazon.com/dp/B0002...SQWCA
Something like this one, remove the stock sensor, install the kit using a 1/8 BSPT (1/8 NPT will work for the test, just seal the threads with sealant) do a cold start and see what the gauge says. If you've got low pressure or screwy pressure (jumping all around) you've got problems. There is a thread in the RWD-SR section about oil pressures for our motors cold, hot, etc. if you don't have an FSM file. GL