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Fuel pump not coming on?

Tiny
PAT V
  • MEMBER
  • 2007 CHEVROLET MONTE CARLO
  • V8
  • FWD
  • AUTOMATIC
  • 30,800 MILES
Fuel pump not coming on. It is not the relay or fuse. Key is "on". No sound indicating fuel pump pressuring up. Car will crank, but will not start. Been having problems lately with car engine quiting while driving, but restarting OK
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Tuesday, January 11th, 2011 AT 3:03 PM

6 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Use a gauge and check fuel pressure, engine cranking. Check for voltage and ground at fuel pump connector, engine cranking. Gray wire is voltage, black is ground. Take connector loose, use test lite between gray wire terminal and black wire terminal, engine cranking, anything, does the lite come on? If good voltage and ground for pump motor and no pump action, suspect the pump.

My hearing is no good, can't hear initial prime anyway. Engine cranking, I certainly can't hear the pump. I have to use a gauge.

Check the guides below on testing wiring and relays

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-to-check-wiring

The entire engine performance wiring diagram is attached below
Let us know what you find
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Tuesday, January 11th, 2011 AT 4:24 PM
Tiny
PAT V
  • MEMBER
  • 2 POSTS
Where is that connector? I have a test light and a meter. Can I access this from the trunk under the carpet or is it inderneath by the tank? Thanks, Pat I heard the fuel pump recently, but not today. I changed relays and fuses from an identical Monte Carlo SS;no luck. It is a 2007 Monte Carlo SS
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Tuesday, January 11th, 2011 AT 5:37 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I'd get at the tank underneath, to find wiring connector. If you have to raise and support the vehicle, make sure to be safe. Safety is your responsibility. Don't support the vehicle with a darn jack, that stuff will get you killed.
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Tuesday, January 11th, 2011 AT 5:53 PM
Tiny
07MCSS
  • MEMBER
  • 2 POSTS
I have a 2007 Monte Carlo SS also. The fuel pump is not coming on. The fuse is good and so is the relay. Is there a ground for the fuel pump at the negative battery cable?
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Saturday, March 12th, 2011 AT 10:21 PM
Tiny
07MCSS
  • MEMBER
  • 2 POSTS
I have a 2007 Monte Carlo SS too. Mine is doing the same thing. Help!
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Saturday, March 12th, 2011 AT 10:23 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If you make a new post, it will be less confusing. I don't know your engine size or vin?
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Sunday, March 13th, 2011 AT 3:03 PM

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