no fuel pressure, can't find problem, short?

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  #1  
Old 08-21-2005 | 01:59 AM
sweet93's Avatar
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Joined: Aug 2005
Posts: 1
Default no fuel pressure, can't find problem, short?

Hi everybody. I'm new to the forum. I have a 92 z28 and it's been running fine for the last 4 years. Yesterday I started it up and made it about 1000 yards then it died. It was like I shut the ignition off. I checked the fuel pressure and it was "0". I found the fuse out by the battery was blown. I replaced it and it blew again when I turned the ignition on. I was told it was the fuel pump. Well it wasn't, I replaced it and had the same thing happened. I found the fuel pump relay fried along with the plug. I replaced both and still it's blowing the fuse by the battery. I can't find a wiring diagram to go by. Can any body help me with this. THanks!
 
  #2  
Old 08-27-2005 | 12:22 AM
z28pete's Avatar
Tech Droid
Joined: Aug 2005
Posts: 9,215
From: North East PA
Default RE: no fuel pressure, can't find problem, short?

The Fuel Pump fuse feeds the Fuel Pump Relay, the oil pressure switch, and the PCM. The oil pressure switch provides













































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































 
  #3  
Old 09-02-2005 | 11:48 AM
j and m performance's Avatar
Joined: Sep 2005
Posts: 8
Default RE: no fuel pressure, can't find problem, short?

try a 5 amp higher fuse an if it still blows , check wireing harness ends , check the ground
im new 2 conrads so dont flame me
 
  #4  
Old 09-02-2005 | 11:19 PM
z28pete's Avatar
Tech Droid
Joined: Aug 2005
Posts: 9,215
From: North East PA
Default RE: no fuel pressure, can't find problem, short?

May want to check your oil pressure sender and the wire around it. One of the electrical paths to the fuel pump is through the oil pressure sender. When oil pressure goes over 5 PSI a switch in the sender closes and feeds power to the fuel pump. The other path is through the fuel pump relay, which is used until the oil pressure sended closes through.
 
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