i think that my fuel pump pooped the bed tonight. i thought that i had a bad fuel pressure regulator, i had just recently installed a Holley AFPR, so i swaped it out with the stock one, but this did nothing. when i first turn the key the fuel pressure will prime to 45PSI, which it should do, but then it drops off to 0PSI i was just wondering if some one could confirm this beibg the pump for me.

 

It could be leaking injector(s) or bad check valve at pump.
Here is some info from Ericthewolf :cheers:

... Here are the sure fail tests for the fuel system to save you time and money.. Take a fuel pressure gauge attach it to the schraeder valve.. turn the key on and off a few time to build up the pressure in the system... If you are having starting trouble the pressure will probably drop as soon as it hits 38 or 40 and the pump turns off it will probably leak back to zero within a few minutes. Ok now right after you prime the system pinch off the return line near the tank if the pressure drop stops it is a bad fuel pressure regulator.... Next pinch off the feed line if the pressure holds then the leak is before the point where you pinched the line IE fuel pump check valve..hole in the metal line on the sending unit caused by it rubbing on the inside of the tank you should visibly be able to see this if you pull the pump and the sending unit...(this was my problem) or the pulse dampener which is the piece between the pump and metal line on the sending unit.. the diphragm tears.. and last if you pinch both the feed and return line near the tank and the leak down of the pressure continues then a fuel injector is your problem.. This is the GM test.. saves time and money..
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:iagree:


[Modified by 86PACER, 2:11 AM 3/27/2004]

 

thanks for the reply guys it ended up being the injectors so i went today and bought a set of ford motorsport/bosch 24# injectors. thanks again for the help :seeya this rounds on me :cheers

 

:party:

 

MPE? :)

 

i got them from CD performance in fallriver. they deal with stangs. the only reason that i know about them is because my friend dynoed his turbo is300 there.