fuel delivery issues?

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lewismwagner27

New Member

Oct 18, 2018

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31907

Oct 18, 2018

#1

• Oct 18, 2018

• #1

2001 v6 runs great when the gas tank is anywhere between full to half. But once i hit half a tank, it starts running like crap. Stalling, jerking, and will shut down making me have to pull off to try and restart the car. I've replaced the fuel pump, plugs, and can position synchronized without any change. Car will cut completely off if I make a hard turn. Seems like fuel pressure maybe??

 

wmburns

SN Certified Technician

Aug 14, 2009

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Houston Texas

Oct 18, 2018

#2

• Oct 18, 2018

• #2

So why guess? Test!

Here's some information on an affordable ODB2 for the DIY'er. In addition this can quickly answer a whole host of other questions about your car.

ForScan ODB2 scanner w ELM327 USB
https://www.stangnet.com/mustang-forums/resources/categories/reference-material.3/

 

L

lewismwagner27

New Member

Oct 18, 2018

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31907

Oct 18, 2018

#3

• Oct 18, 2018

• #3

OBD-ii Code P0453 definition: The EVAP (Evaporative Emissions) System allows fuel tank vapors to be purged into the engine and burnt rather than expelled into the atmosphere as harmful emissions.

P0460 is a diagnostic trouble code (DTC) for "P0460 Fuel Level Sensor Circuit Malfunction".

2 codes im getting

still makes no sense to me why the stalling from a half tank and below

 

wmburns

SN Certified Technician

Aug 14, 2009

5,892

514

204

Houston Texas

Oct 19, 2018

#4

• Oct 19, 2018

• #4

So what is the fuel pressure when the problem occurs?

It also seems obvious to me that there's a problem with the wiring to/from the gas tank to the car's body itself. I further suspect there's a problem inside the gas tank. For example:

• A hole in the suction side of the fuel pump such that the hole is uncovered when the gas level drops below half tank.
• Some sort of problem with the fuel level arm. Perhaps it's shorting out other wires when the tanks level is below half tank.
• There's a crossed wire such that the power for the fuel pump is being affected by the fuel level sensor.

If this were my car I would be doing a through visual inspection of the wiring to and from the gas tank hat and through the tank hat.

I think the DTC's are a symptom of the real problem.

 

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lewismwagner27

New Member

Oct 18, 2018

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31907

Oct 24, 2018

#5

• Oct 24, 2018

• #5

thanks for your reply. im going to drop the tank again and see whats going on. I am getting wrong fuel level readings a lot on my fuel guage