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No fuel

Tiny
RP
  • MEMBER
  • 2004 CHEVROLET CAVALIER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 127,000 MILES
Crank, no start. No gas. Dropped tank. Jumped pump and it runs. Have 11.64 volts at pump connection and body connection when turning key to run for approx 2 seonds. Switched relay with a/c relay and still no fuel. Resistance prob? Or?
Sunday, November 28th, 2010 AT 10:51 PM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the computer controlled circuit of the fuel pump relay coil side not energizing to complete the fuel pump circuit to the pump
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Sunday, November 28th, 2010 AT 10:55 PM
Tiny
RP
  • MEMBER
  • 4 POSTS
Any way of testing? Sill tho wouldnt the pump run for the 2 secs it has 12 volts?
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Sunday, November 28th, 2010 AT 10:59 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The fuel pump won't run for 2secs if there's a problem with the relay-try swapping the relay with a like one and see what happens-the relay only comes in play for 2 secs when the engine fires up its the fuel pump/oil pressure sending unit that powers the fuel pump constantly
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Sunday, November 28th, 2010 AT 11:05 PM
Tiny
RP
  • MEMBER
  • 4 POSTS
Swapped relay and no difference. Yes, I meant to say that it IS energizing the pump with 12 volts for the 2 seconds. I, m thinking that the pump is getting proper voltage but NOT enough amps?Crappy ground or?
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Sunday, November 28th, 2010 AT 11:12 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure with a fuel pressure tester if its within specs and also if the injectors are pulsing
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Sunday, November 28th, 2010 AT 11:15 PM
Tiny
RP
  • MEMBER
  • 4 POSTS
Sorry, my answers are steering you wrong LOL and thank u for the quick responces! I'll try to be more clear
the pump is definately good, will run jumped ( out of car )
has 12 volts to it for 2 secs when turning key on but pump wont run
harness from body to pump is good
switched relay
So I see in other posts possible poor ground not allowing enough amps? Any ideas along that line?
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Sunday, November 28th, 2010 AT 11:26 PM

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