Engine Performance problem
1995 Ford Windstar 6 cyl Front Wheel Drive Automatic 2000 miles
If a fuel pump is not meeting the pressure spec'ed by the OEM manual during operation is that pump ALWAYS considered bad and if not then why not?
This is a new engine and most all other wear parts are new as well. Pump and injectors are original. FORD says that spec fuel psi is 30 - 45 psi at idle and at 2500 rpms for 1 full minute.
Operating PSI at idle or 2500 rpms for 1 minute is 27 - 29 psi and never goes above 29 during operation. Revving cause it to stay/dip around 27 psi consistently.
FUEL PUMP BAD? If so then why do 2 of the shops I brought it to say NO? I'm very puzzled about this.
Recently I had the filter changed (only was 9000 miles old) on a hunch of bad gas (neighbor had some) and I was right. It was clogged. Key flick without eng on was only up to 12psi after depressurized system. Now since the filter was replaced it is 34 - 38 psi at 1st key flick no eng on though operating psi is still what I said above 27 - 28psi.
Lastly, I am getting 9 mpg in town and 17 hwy. Bad.
HELP me understand. Thank you so much.
have the same problem?
Friday, December 19th, 2008 AT 4:38 AM