QUOTE(r_towle @ Oct 5 2009, 03:00 PM)
The fuel pump does not come on in Ljet until after the car starts and air is moving enough to open the flapper in the AFM unit.
I think it is supposed to come on while cranking, but you need great compression and a fantastic battery to create enough draw to open the flapper....so old cars dont function like this anymore.
I never liked that.
Basically the system MUST stay up in pressure when parked, yet few really do over long periods of time....like winter storage.
So, the fuel lines need to be checked and replaced, all of them.
New metric hoses, new FI clamps (not hardware store clamps...get the good ones)
when this happened to us, it was the fuel pump dying...so start shopping around for a fuel pump.
You can remove the large intake hose at the AFM and with the key in the run position, stick your finger in the AFM and active the flapper door.
You will hear the fuel pump run, and you will hear it change tone once the system is pressurized.
Then put it back together and the car should start.
Rich
Yeah, Rich, you're right about the flapper switching on the fuel pump. However, the pump should also run when the starter is activated. It's an OR-function: Pump IF starter OR flapper.
Your suggestion about listening for fuel pressure is a good one -- if you move the flapper to power the pump, you can listen for the change in fuel pump tone when the system finally pressurizes after a few seconds of running.