1997-98 Fuel Delivery System
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Pro
Joined: Sep 1999
Posts: 555
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From: Las Vegas NV
1997-98 Fuel Delivery System
What is the difference between the 97-98 and later fuel delivery systems that causes the 97-98 to have two braided steel lines coming into and the later models only have one?
Pro
Joined: Oct 2003
Posts: 537
Likes: 1
From: Elkton MD
Nat,
'97/'98 Vettes have what is called a "return type" fuel system. This system has the fuel pressure regulator mounted up front at the fuel rail, and any fuel in excess of the engines needs is bypassed back to the fuel tank. The advantage to this system is that there is less pressure drop, under high demand conditions, at the fuel rail.(i.e. engine) Vettes later than '98, had the fuel pressure regulator located in the rear of the vehicle either in the fuel filter or later yet in the tank. The '99 and later systems were redesigned to achieve tougher emissions requirements.
The '97/'98 (two line) return system is widely acknowledged to be a superior flow system.
'97/'98 Vettes have what is called a "return type" fuel system. This system has the fuel pressure regulator mounted up front at the fuel rail, and any fuel in excess of the engines needs is bypassed back to the fuel tank. The advantage to this system is that there is less pressure drop, under high demand conditions, at the fuel rail.(i.e. engine) Vettes later than '98, had the fuel pressure regulator located in the rear of the vehicle either in the fuel filter or later yet in the tank. The '99 and later systems were redesigned to achieve tougher emissions requirements.
The '97/'98 (two line) return system is widely acknowledged to be a superior flow system.
Last edited by Old Timer; Nov 5, 2004 at 12:44 AM.
Pro
Joined: Oct 2003
Posts: 537
Likes: 1
From: Elkton MD
Originally Posted by Patman
Is it true that the C5 has two fuel pumps?
Patman,
Sorry, only one fuel pump in any of the C5's. There is a somewhat complex siphoning system, using the one fuel pump, to move fuel between the two fuel tanks. There are however, two fuel level sensors, one in each tank.
