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Not getting power to the fuel pump

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
That is normal to build rail pressure, if there is no continuing rpm signal the pump is shut down. You have only checked one avenue. You need to check spark, and if you have spark, check that the injectors are firing.
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
  • 1983 CADILLAC DEVILLE
  • 8,000 MILES
I have got a 1983 Cadillac Coupe Deville and I am having trouble with the fuel pump. When I go to start the car it really wants to turn over, but the fuel pump won't turn pump gas to the engine. But if I put gas in the carberator then it will try to run off the gas I put in the carbirator.
We have gotten it once to run off the gas I put in the carbirator. I am debating if it is the fuel pump, fuel pump relay, or a blown or missing fuse. The problem comes, because I don't know which relay is which. Can someone please give me some suggestions on this subject?
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Do a fuel pressure check. In most cases, it is the fuel pump itself that has failed.

Roy
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
OK THANK YOU I WILL LOOK INTO THAT
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
I had the same car back in my cadie yrs. Do u hear the pump run when u first turn the key on?Drop the r/side under dash panel.U will see a relay panel with fuses in it. There is a 20 amp. Mini fuse their marked fuel pump. Use a test light or volt meter to check that voltage is there and the fuse isnt blown. We can start here. Kk
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
Ok thanks cadieman. I will look into that and tell you the results when I can thank you. It might be a week or so before I can do it cause im busy so please keep watching for my reply
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Np gl ill be here.
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
Hey cadieman. I am sorry I have not replied in a while. Ive been working on my 1983 Cadillac Coupe Deville. I changed my fuel pump.
It actually runs now. But I have 1 question. How do I clean the digital fuel injectors in the throttle body?
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Add Lucas fuel system cleaner. He
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
Ok I will cadieman. Thank you for your help. We are still working on the car. Lol
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Saturday, May 23rd, 2020 AT 11:45 AM (Merged)

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