Fuel Pressure Question

[justjuiceit]

I was reading the FSM and it said that fuel pressure is 43 psi when starting up, but 33 psi when idling? I thought it would be 43 psi at all times.

[candela]

negative

[:: orion ::]

The spec is 43.5psi (3bar) with the vacuum line disconnected from the FPR.

With the line connected, at idle, you'll see only ~34psi due to the FPR lowering the pressure to keep the pressure differential across the injector tip constant, which keeps flow constant.

- Brian