I've been working with a bud's turbo 2.0 talon with oil pressure problem.
The oil pressure holds steady up to 3000 RPM then starts dropping until about 5000 when it goes into the red zone.
Uphill, downhill or sidways doesn't matter unless its revved over three grand then it's low pressure.
Lots of oil, filter not clogged.
I'm thinking relief valve but cannot figure how it would cause those symptoms, good pressure to three then a steady fall off until the RPMs are brought back down to three again.
The lifters aren't ticking so no air should be in the system (common prob with these) and the power seems fine except I am afraid to really stomp it to the redline with such dinky oil pressure past 4000.
Two days ago the talon ran fine, it started doing this halfway through a twenty minute trip. No loose connections on the sender and no loose oil on the engine.
Could a broken relief spring hold to a set pressure, open, and then not be able to close again until the volume dropped? I'm reaching here.
I just want to dismantle as little of the engine as possible this weekend, if it's not a Fiero it's not fun,it becomes work. Yuck.