why doesnt my replaced fuel pump not work?

2001 CHEVROLET IMPALA
165,435 MILES
Avatar
RECAP
  • MEMBER
  • 3 POSTS
I replaced the fuel pump, fuel filter, and now im not getting and fuel. I have spark and from what i can see the crank shaft sensor is ok,and I had the relay checked and its fine. Im at a stand still and i cant figure out what else to do? thanks.
Dec 15, 2011 at 2:48 PM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check if the injectors are pulsing
Dec 15, 2011 at 2:50 PM
Avatar
RECAP
  • MEMBER
  • 3 POSTS
they are pulsing right at 12volts
Dec 15, 2011 at 3:07 PM
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Power the fuel pump from the battery to the fuel pump wiring connector and see what happens
Dec 15, 2011 at 3:19 PM
Avatar
FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
Did you check for power and ground when you were at the fuel pump connector, and possibly even look at the connector itself for terminal or heat damage?
Dec 15, 2011 at 3:21 PM
Avatar
RECAP
  • MEMBER
  • 3 POSTS
yes there is power going to the pump, i checked after i checked the injectors. I think it could be a bad pump.
Dec 15, 2011 at 4:00 PM
Avatar
WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
[quote]they are pulsing right at 12volts[/quote]

Injectors are not controlled through power. They get a pulsing ground signal and you need to use a noid light to test that.

Dec 15, 2011 at 4:02 PM
Avatar
FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
What ground source did you use to determine power to the pump, the circuit ground. Have you load tested the ground circuit?
Dec 15, 2011 at 4:03 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle