ZR-1 Net Registry Forums - View Single Post - What is the expceted Fuel Rail Pressure when driving

QB93Z · 05-22-2011

Checks I did without an assistant to actually drive the car.

Fuel pressure at idle: 40psi

Fuel pressure at idle with the vacuum line to the FPR disconnected: 50 psi

Fuel pressure at idle while I used a vacuum pump to pull vacuum on the FPR: pressure drops from 50 psi to 40 psi.

So If I assume that the difference between my reading of 40 psi and Marc's comment that fuel pressure should be 43 psi may be gauge tolerance, I conclude that the Fuel Pressure Regulator is responding properly.

Next step, drive the car. So I am waiting for a ZR-1 assistant driver certified for WOT operation.

Jim

05-22-2011	#10
QB93Z Join Date: May 2007 Location: Westminster, Maryland Posts: 3,684	Re: What is the expceted Fuel Rail Pressure when driving Checks I did without an assistant to actually drive the car. Fuel pressure at idle: 40psi Fuel pressure at idle with the vacuum line to the FPR disconnected: 50 psi Fuel pressure at idle while I used a vacuum pump to pull vacuum on the FPR: pressure drops from 50 psi to 40 psi. So If I assume that the difference between my reading of 40 psi and Marc's comment that fuel pressure should be 43 psi may be gauge tolerance, I conclude that the Fuel Pressure Regulator is responding properly. Next step, drive the car. So I am waiting for a ZR-1 assistant driver certified for WOT operation. Jim