Engine Performance problem
1998 Ford Taurus 6 cyl Front Wheel Drive Automatic 110000 miles
At cold start the fuel pressure was 10 lbs (key on, no engine running). After starting engine fuel presure came up to 32 lbs very quick. Restarts the fuel pressure remained high. After waiting for a long period the fuel pressure would go back to zero and a step of turning key on and off ( not engine start) 3 or 4 times would bring the fuel pressure up to 40 lbs. Why is it taking so long for fuel pressure to come up. The initial 2 seconds of fuel pump before start does not seem long enough to bring pressure up to running pressure. Is this normal!
I kow it is not the fuel filter as I just replaced it, fuel pressure was to zero and it took 4 key (on and off) cycles to bring pressure up to 40 lbs. The normal 2 seconds doe not bring up the fuel pressure enough to start car efficently.
Saturday, October 2nd, 2010 AT 11:32 AM