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89 Won’t start after filled up with gas

  • Thread starter Thread starter James1989
  • Start date Start date Oct 1, 2020
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James1989

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#21
  • Oct 2, 2020
  • #21
Noobz347 said:
These sentences lead me to believe that there is 'junk' in your fuel tank. Initially, it clogged the filter then was likely replaced only to push more contaminates through the new one.

More testing can certainly be done to confirm but it is beginning to sound to me like the tank needs to come out.

Once it's out of the car, it needs to be worked over inside and out. My prediction is that you're going to find a fair amount of rust inside.


My next step would be this: Disconnect the fuel lines at the rail. Run extension hoses and pump all of that fuel into gas cans.
Click to expand...
Will do Sir, so first disconnect my fuel lines from the rail and pump the gas back into the tank?
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
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#22
  • Oct 2, 2020
  • #22
James1989 said:
Will do Sir, so first disconnect my fuel lines from the rail and pump the gas back into the tank?
Click to expand...

Pump that gas into gas cans. Then look and see what the gas looks like and remove your new filter to see what it looks like. If there's a bunch of junk in it, then that junk is also in your injectors.
 
J

James1989

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#23
  • Oct 2, 2020
  • #23
James1989 said:
Will do Sir, so first disconnect my fuel lines from the rail and pump the gas back into the tank?
Click to expand...
I don’t mean to sound dumb,
Noobz347 said:
Pump that gas into gas cans. Then look and see what the gas looks like and remove your new filter to see what it looks like. If there's a bunch of junk in it, then that junk is also in your injectors.
Click to expand...
Ok will do Sir, and not to sound dumb for asking again but do I siphon the gas from the gas tank into a gas can or from the fuel rail?
 

Noobz347

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#24
  • Oct 2, 2020
  • #24
If the fuel supply is weak when you pump it out, that will be a sign of issues too.


James1989 said:
Ok will do Sir, and not to sound dumb for asking again but do I siphon the gas from the gas tank into a gas can or from the fuel rail?
Click to expand...

You pump it directly from the fuel rail to the gas cans.

You will need some hose to put over the ends of the fuel lines. These hoses will need to be long enough to reach the gas can. Disconnect the fuel lines from the rail (you will need a fuel line disconnect tool for this). Attach a hose to the pressure line and run it to the gas can. Insert a jumper into the fuel pump test leads (refer to the thread General Karthief posted above for instructions) and pump the gas into the cans.

Observe what happens. It should pump a lot of gas in a hurry. Be ready to switch cans or disconnect the jumper between cans). Look at the fuel for discoloration or any solids. Inspect your new fuel filter for contaminates.

If you discover contaminates then those same contaminates are in your entire fuel system.

If this is true, the tank needs to come out, pump swapped, filter swapped, and fuel injectors removed, cleaned, and flow tested. The tank will need to be cleaned and reinstalled or replaced if it's full of rust.
 

Noobz347

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#25
  • Oct 2, 2020
  • #25
By the way?

How long did this car sit with a partial tank of fuel in it?
 
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James1989

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#26
  • Oct 2, 2020
  • #26
Noobz347 said:
By the way?

How long did this car sit with a partial tank of fuel in it?
Click to expand...
Will do what you said in the last post. And to be honest my gas tank is always below halfway, I usually just put in 5 or 10 dollars in and drive until my gas light turns on then I fill it with another 5 or 10 dollars
 

Noobz347

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#27
  • Oct 2, 2020
  • #27
James1989 said:
Will do what you said in the last post. And to be honest my gas tank is always below halfway, I usually just put in 5 or 10 dollars in and drive until my gas light turns on then I fill it with another 5 or 10 dollars
Click to expand...


Was there a period of time where it just [sat]? How long was that?
 
J

James1989

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#28
  • Oct 2, 2020
  • #28
Noobz347 said:
Was there a period of time where it just [sat]? How long was that?
Click to expand...
Maybe for 4-5 days at most. But I live in Houston. And a few weeks ago it did rain hard and I had to drive home and my car stalled at a red light but started right back up. And 2 days after that my gas light turned on and that’s when I finally filled up the tank all the way up and the car wouldn’t start. Had to push start it and it was still very weak and feeling like it would die
 

Mustang5L5

That is…until I whipped out my Bissell
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#29
  • Oct 2, 2020
  • #29
You really need to rent or buy a fuel pressure guage and get a reading.
 
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James1989

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#30
  • Oct 2, 2020
  • #30
Mustang5L5 said:
You really need to rent or buy a fuel pressure guage and get a reading.
Click to expand...
Will do today. So I just prime my fuel pump by turning the key, turn it off and then check the pressure? And what psi should I be at
 

Mustang5L5

That is…until I whipped out my Bissell
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#31
  • Oct 2, 2020
  • #31
Prime it a few times in a row. On each prime while pump is running, it should peg at 39psi.

when the pump is off, it may drop due to pump check valve issues. For now you just want to ensure you are getting 39psi with pump running.

there is also a way to trigger pump diagnostics in which the pump will run constantly even without the engine starting.
 

Noobz347

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#32
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  • #32
 
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Mustang5L5

That is…until I whipped out my Bissell
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#33
  • Oct 2, 2020
  • #33
Here you go



locate the test connectir under the hood and jump out the black/white and tan/green wire. The fuel pump should run continuously. You should have 39 psi on the guage.

once confirmed, remove the jumper.
 
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Noobz347

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#34
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J

James1989

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#35
  • Oct 2, 2020
  • #35
Mustang5L5 said:
Here you go



locate the test connectir under the hood and jump out the black/white and tan/green wire. The fuel pump should run continuously. You should have 39 psi on the guage.

once confirmed, remove the jumper.
Click to expand...
Will do, and a paper clip could work right? I’ll find wire if not
 
J

James1989

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#36
  • Oct 2, 2020
  • #36
Noobz347 said:
Click to expand...
Noted, thank you!
 

Mustang5L5

That is…until I whipped out my Bissell
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#37
  • Oct 2, 2020
  • #37
paper clip will work
 

90sickfox

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#38
  • Oct 2, 2020
  • #38
Just FYI the Schrader valve on the fuel line unscrews just like a tire stem. You can use the same tool to take the valve out and put a rubber fuel hose from there to a container to drain the gas. The stem is special for fuel lines so don't loose it. A regular tire stem valve will screw in but fuel will eat the seal.
 

Wayne Waldrep

Before I post a pic, do you have one of yours?
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#39
  • Oct 2, 2020
  • #39
You said the maf is plugged in but the "air duct" is not connected. You aren't taking about the rubber tube from maf to throttle body are you?
 

General karthief

wonder how much it would cost to ship you a pair
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#40
  • Oct 2, 2020
  • #40
The answers to all your questions are in the checklist I posted, you need to check your fuel pressure with a gauge, just pushing the Schrader valve to see if fuel comes out is not the way to determine fuel pressure.
You will be dropping the tank and replacing the fuel pump at the very least, I'd bet on that.
 
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