Fuel pressure drops after start and dies

Reply Subscribe

Thread Tools

Search this Thread

02-08-2007, 05:48 PM

tfnaaf

Thread Starter

Join Date: Jan 2007

Posts: 8

Fuel pressure drops after start and dies

87 5.0 currently SD system converting to MAF after i fix current bugs......

Problem: Car starts idles fine @ around 30psiof fuel pressure( i know should be more but its a cheap guage). After maybe 20-45 seconds, pressure starts dropping and car starts to die out and finally shuts off. I can hear the pump running on its last breath. Pump was new about a month or so ago.

possible problems? Bad pump? Bad hosefrom pump?

Any suggestions appreciated!

Thanks,

Tom

02-08-2007, 05:53 PM

Ninety5five0

5th Gear Member

Join Date: Nov 2005

Location: Katy, Texas

Posts: 3,311

RE: Fuel pressure drops after start and dies

Do you have an aftermarket fuel pressure reg ?

Any noticable leaks anywhere ?

02-08-2007, 08:53 PM

tfnaaf

Thread Starter

Join Date: Jan 2007

Posts: 8

RE: Fuel pressure drops after start and dies

found the problem, the hose that goes between the pump and the tube was lose and brittle. The guy that changed the pump must have not changed it. It had those cheap plastic clamps that werent even tight. And btw its all stock atm short of a e303 cam........ MAF coming soon!

02-08-2007, 09:03 PM

AdderMk2

Banned

Join Date: Dec 2005

Location: Lil' Rhody

Posts: 22,376

RE: Fuel pressure drops after start and dies

Quote:

ORIGINAL: tfnaaf

found the problem, the hose that goes between the pump and the tube was lose and brittle. The guy that changed the pump must have not changed it. It had those cheap plastic clamps that werent even tight. And btw its all stock atm short of a e303 cam........ MAF coming soon!

thats actually common, and typically one of the first things i recommend checking