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My engine will not crank over why?

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Spraying fuel so many inches doesn't tell me the pressure. Auto zone rents fuel pressure gauges to measure the pressure. Also they may even rent you a code reader depending on which state you live in. So itrruns normal on a starting fluid?If so its a fuel related issue. Also ask auto zone about rent a noid light set for checking injector pulse. Which engine do you have?
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
V6 awd l. I live in GA and I just got a code reader about to check the codes now
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
And the code reader isn't giving me any codes
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
  • MEMBER
  • 32 POSTS
Ok I got a fuel pressure gauge and when I switch the car to on and can hear the pump come on. The gauge goes to 53. Then it goes back down. I can't start the car to check it in idle cause it won't crank.
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
SATURNTECH9
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So as soon as the fuel pump stops running the fuel pressure. Drops from 53 to 0psi?Because it shouldn't do that. Also did you get a noid light to check for injector pulse?Have you checked all the fuses?Do you have a test light?
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
No I didn't get the noid light. Yes I've checked all the fuses with the test light. Everyone I've talked to is saying its a bad fuel pump. The fuel pump is $478 at AutoZone. I really hope that's not the case
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
How about the fuel pressure regulator. If it is bad would that cause it to lose its pressure like that?
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
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The pressure regulator could cause it to bleed down so could the pump. But if the pump is putting out 53psi while the pump is running it should start.
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
SATURNTECH9
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With the key in the run position see if you have power to the injectors?
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
Ok lets make sure I'm doing this correctly. I pulled the plug off the injector closest I could reach. Put my red probe in the plug and grounded my black probe. Doing that I got nothing
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
Ok I've realized I was doing it wrong. Yes I'm getting.50 to.54 volts. A half a volt basically
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
The spec sheet I got from AutoZone says the minimum fuel psi should be 100 and max psi should be 115. Does that sound right?
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
SATURNTECH9
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The pressure should be 48-56psi you should have battery voltage at the injectors with the key in the run position. With the key in the run position see if you have battery voltage to both sides of the injector fuse?
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
Yes its got battery power at the fuse. I don't have a stethoscope so I used a rubber hose to see if the injectors were clicking and they weren't just trying to turn the engine over but when I sprayed ether in the throttle body to get it to crank it was very apparent that they were clicking. I checked two injectors just to be sure
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
SATURNTECH9
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You should have battery voltage on terminal number 2 the red wire at each injector harness with the key in the run position?If not I would check the splice pack for those wires on the right side of engine under the intake air duct.
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
  • MEMBER
  • 32 POSTS
Ok flash forward. I've just replaced the fuel pump that was 537 bucks. It acts like it wants to spin now but still not cranking I'm bleeding the lines as I turn the ignition on and off pressure build up just still doesn't seem to be holding still
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
SATURNTECH9
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So what did you find with what I asked you to check?
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
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  • 32 POSTS
All the fuel lines from the tank go into a separate box about 12 inches from the tank. What is that box and what's it do. Looks like some other sort of filter
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
SATURNTECH9
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That box is your charcoal canister it handles the fuel vapors from your gas tank not raw liquid fuel. Its for smog.
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)
Tiny
CLINTCOSTON
  • MEMBER
  • 32 POSTS
Ok so I think that someone put something in my gas tank. Water or something. Cause whatever was coming out of the fuel tray was milky and didn't even have a strong gas smell to it. So I pulled the tank back out. Emptied it rinsed it with good gas and cleaned it out. I got it all back in now and definetly getting gas to the fuel tray but its still not cranking. What now. Oh and I do have power to each of the injectors
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Tuesday, February 9th, 2021 AT 10:36 AM (Merged)

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