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Crank no start

Tiny
WROJAS0919
  • MEMBER
  • 2000 BMW 328XI
  • 130,000 MILES
Hello, my car cranks but no start. I changed fuel pump and started, but now car cranks and no start again and there is no power to fuel pump or fuel pump relay. Fuses are good.
Wednesday, March 4th, 2020 AT 1:51 PM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Let's do two things. First check for codes. If you have a code for something else that shares a power source that the fuel pump relay does then that will explain things a little more.

Next which wire have you checked for power at the relay? If you have it on the red/violet wire from the fuse then we have a relay issue. However, we need to test each of these wires while the key is on and see which has power and which does not.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit
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Wednesday, March 4th, 2020 AT 3:36 PM
Tiny
WROJAS0919
  • MEMBER
  • 13 POSTS
Hello, thank you for the diagram! The problem was it was missing fuse #54 don’t know how but it wasn’t there put in fuse and car started right up.
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Monday, March 16th, 2020 AT 1:37 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Haha. Just goes to show, we always check the basics first. Thanks for the update. Glad you got it resolved.
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Monday, March 16th, 2020 AT 3:29 PM

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