Thread: no start
View Single Post
  #3  
Old Wed, February 10th, 2010, 06:41 PM
cleatus12r's Avatar
cleatus12r cleatus12r is offline
F Your Yankee Blue Jeans
 
Join Date: Jan 2009
Location: Somewhere in Montana
Posts: 2,665
cleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to all
Default

No. No codes without a code reader.

The sender was just replaced? Did the supply line get kinked/pinched?
An air leak in the fuel line upstream of the pump (which is under the floorboard) will cause a fuel starvation issue because the pump will suck air instead of fuel out of the tank. Checking fuel pressure isn't really easy on a Super Duty since Ford conveniently failed to put a port on the fuel bowl like on the older trucks. There is no fuel pressure sensor on the engine either, but an indirect way of checking fuel pressure is to monitor the injection control pressure and commanded fuel pulse width. A lot of pressure and a long commanded pulse width are signs that there isn't enough fuel pressure. A pressure gauge can be attached to the fuel bowl drain valve tube at the passenger side front of the engine...just be sure to use clamps on the hose because fuel pressure will be around 60+ PSI if everything's working right. Attach the pressure gauge, open the drain valve, turn on the ignition (can you even hear the pump running with the key on/engine off??), and look at the pressure. The pump should run for 20 seconds.
__________________
Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
Reply With Quote