I have a hypertech adjustable fuel pressure regulator on my car with a guage on the line. The needle bounces 3 pounds or so and with no vacuum line the pressure raises with car RPMS. The needle bounce is quick, almost a blur to read. I thought it was common until I put the guage on my friends 95 with a BBK adj reg. and it was steady as can be. My guage reads 35# of pressure without the N20 running but the car puts out a rich smell. Real rich and I have never had a running lean problem. Is there anything else that effects fuel pressure or is it a bad regulator?
92 mustang Coupe
Looking for drag race suspension parts. Also looking for nice 4cyl body to start new project. E mail me if you have either.