Engine cranks, no spark, no fuel pressure?

Tiny
FITPLUMBER
  • MEMBER
  • 1997 CHEVROLET EXPRESS
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 193,000 MILES
Engine cranks. No spark. No fuel pressure. I pulled the fuel pump relay and jumped 87 to 30 and fuel pump runs, builds pressure to 60 PSI. When the key is on, there is no power to the timed test circuit. Also, when the ECM-B fuse is in, there is a parasitic draw of 0.8 AMPS. When the fuse is pulled then amp draw goes down to 0.01 AMPS.
Saturday, February 10th, 2024 AT 1:31 PM

11 Replies

Tiny
KEN L
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If the battery does not dead after a couple of days don't worry about the draw. The system goes to sleep after a few minutes. For the not start problem it sounds like the crankshaft angle sensor has gone out because the PCM will not turn the fuel pump on if it does not see engine rotation, and no spark as well. Check the electrical connector as well because the wiring can get damaged due to the position of the sensor. Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.
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Saturday, February 10th, 2024 AT 5:25 PM
Tiny
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The draw on the battery drains it in 24 to 36 hours. This is not a normal condition. The draw never goes away. The fuel pump should run momentarily by just turning the key without attempting to turn the engine over. It does not. I don’t think this is the answer.
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Sunday, February 11th, 2024 AT 3:14 PM
Tiny
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To say a little bit more, the answer I received sounds like my post was not read carefully. The fuel pump should come on momentarily when the key is turned without cranking, it does not. And the fuel pump works because I tested it and got pressure.
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Sunday, February 11th, 2024 AT 3:18 PM
Tiny
KEN L
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Sorry about that, you are correct. I see now the ECM B fuse goes to the fuel pump, relay and the oil pressure sensor which controls the fuel pump as well. I would swap out the oil pressure sensor and fuel pump relay to see if the battery draw stops and the fuel pump starts working when the key is turned on. Here is the location of the sensor. Also, let's run the codes if this does not help.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Please let us know what happens.
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+1
Monday, February 12th, 2024 AT 9:21 AM
Tiny
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I will check out your suggestions. Thank you.
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Thursday, February 15th, 2024 AT 3:21 AM
Tiny
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One of my biggest questions is why there is never any power to the fuel pump prime connector. Where does the fuel pump prime connector get its power from? Is it from the power train control module?
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Thursday, February 15th, 2024 AT 3:53 AM
Tiny
KEN L
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The ECM B fuse supplies power to the fuel pump test connector. Do you have power at the fuse, is the fuse good?
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Thursday, February 15th, 2024 AT 5:04 PM
Tiny
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Yes, I have power at the fuse. The fuse is good.
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Friday, February 16th, 2024 AT 1:50 AM
Tiny
KEN L
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Do you have power at the grey wire at the oil pressure sensor/switch?
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Friday, February 16th, 2024 AT 10:28 AM
Tiny
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I will check this and respond.
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Sunday, February 18th, 2024 AT 3:41 AM
Tiny
KEN L
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Sounds good.
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Monday, February 19th, 2024 AT 8:39 AM

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