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2013 Ford Taurus Schrader valve?

Tiny
AISLEOFVIEW
  • MEMBER
  • 2013 FORD TAURUS
  • 3.5L
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 52,000 MILES
Trying to find where to attach fuel pressure test kit.
I've had two mobile mechanics come to my house $75.00 per mechanic. Bought a fuel pump module as instructed by mechanic #2 @ $65. Oo. No change
I've paid fees on just answers. Con and a few others to no avail.


Paying for a service that doesn't deliver any help is getting redundant.

If YOU guys can help me to solve this, I WILL donate.
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Monday, August 4th, 2014 AT 5:35 PM

37 Replies

Tiny
TY ANDERSON
  • MECHANIC
  • 719 POSTS
My understanding of these engine are they are a direct injection fuel system meaning the fuel is pressurized to extremely high pressures to inject directly into the combustion chamber. The only way to I've heard to test these systems is to depressurize the system & install a special tool that tees into the fuel pipping to measure high fuel pressure. So these systems do not have a shrader valve in the fuel system. These systems have a pressure sensor monitoring the fuel pressure in the fuel rail.
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Monday, August 4th, 2014 AT 7:22 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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First, you are not dealing with a traditional system. This vehicle has what is called an Electronic Returnless Fuel System (ERFS). Before I can begin to help, I need to know if there are any trouble codes stored in the computer.

I have attached a schematic of your system. As you will see, there is no schrader on the fuel rail. However, fuel pressure could be tested at the fuel filter with adapters.

One last question, will the engine start at all? If not, will it start if you use starting fluid?

Please keep in mind, there are a few things that can cause the fuel pump to fail. Don't just replace the fuel pump without checking a few things first.
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Monday, August 4th, 2014 AT 7:27 PM
Tiny
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Hello and thank you both for your research into my Taurus.

The car Starts fine. Normal, actually. It stalls slowly. Reminds me of a lawnmower than runs out of gas. (Yes. I have full tank)

I'm not sure how to start a vehicle using starter fluid.

P0113
P0103
P0100
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Tuesday, August 5th, 2014 AT 12:00 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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P0113 -- Intake air temp sensor 1 circuit high

Possible causes:

IAT open circuit
IAT short to power
Damaged IAT sensor
Wiring incorrect

P0103 -- Mass Air Flow circuit high

Possible causes:

MAF open circuit
MAF short to power
Damaged MAF sensor

P0100 -- Mass Air Flow circuit A high

Possible causes?

MAF open circuit
Intake air component incorrectly installed.

Wow. Where do we start. Based on everything I have read to this point, it sounds like either you have no power to the MAF/IAT sensor. That is where we need to start. Are you able to check the MAF wiring harness to confirm that it is getting power and a good ground?
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Tuesday, August 5th, 2014 AT 6:28 PM
Tiny
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Is this the sensor?

If you can guide me on testing procedure, I'll start immediately.

Thank you
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Tuesday, August 5th, 2014 AT 8:45 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Before we begin, please make sure there are no obstructions in the air intake system, everything is tight and properly secured, and the MAF is properly seated.

If all looks good, disconnect the MAF sensor harness. The connector should be a six pin connector. I need you to locate pin 3 (VPWR) on the power supply side. Turn the key to the run position with the engine off. Using a volt meter / multi meter, probe pin 3 with + of meter and ground the other side of meter.

Do you have at least 10.5 volts?

Let me know so I can continue on the right track.
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Wednesday, August 6th, 2014 AT 8:33 PM
Tiny
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I'm only able to locate a 4pin/wire

from what I understand. I could be hugely mistaken though.
Taken from
http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/maf-sensor-tests-1

"Ford has used a Hot-Wire type mass air flow sensor for many years that either comes with or without an internal air temperature sensor. If the MAF sensor has 6 wires, then this is a dead giveaway that it has the air temp sensor integrated inside. If the Ford MAF sensor on your car has 4 wires, then it does not have an air temp sensor integrated within it (the air temp sensor will be somewhere on the air duct that connects the MAF sensor to the throttle body or somewhere on the intake manifold.
On the image viewer on the right, you'll see photos of several different Ford MAF sensors. These come in either a black or light gray body and with 6 or 4 wires in the connector. Regardless of what color body the MAF sensor has or the amount of wires in the connector... they are tested the same"

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Wednesday, August 6th, 2014 AT 8:46 PM
Tiny
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The one you sent me is for a different engine. My manual says it is a 6 pin connector. I attached pics for you to see.
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Wednesday, August 6th, 2014 AT 8:54 PM
Tiny
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This is what I have.
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Thursday, August 7th, 2014 AT 11:21 AM
Tiny
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  • MECHANIC
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Okay, I need to try to do this without my manual. The schematic must be different. It is showing a different set up for you vehicle. Tell me, I see you have been checking the wires. Have you located the VPWR (vehicle power) wire? Have you located the ground?
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Thursday, August 7th, 2014 AT 3:02 PM
Tiny
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This might have something to do with it.
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Thursday, August 7th, 2014 AT 7:30 PM
Tiny
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The pics didn't come through. Make sure they are a jpeg.
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Thursday, August 7th, 2014 AT 8:09 PM
Tiny
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This is the 2013 Ford Taurus
receiver, (AM-FM-CD-MP3, single disc),
Stock Number: I89099430O

Thin green wire is a ground.
Knowing it as a ground, I was curious to find out what the car would do if I ran direct ground to the little green wire as I start the car. Guess what? Well, nothing. Not even a turn of the motor. Dead battery type of attempt. Then I removed the direct ground and car did Start. Until it stalled.
According to my cable tracker it's open somewhere. Just wish I could find out where it leads to.

I could be chasing ghosts here. Who knows. Just thought maybe it would help you with your investigation,

Thanks again
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Thursday, August 7th, 2014 AT 11:55 PM
Tiny
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Key in run position with engine off.
Maf harness disconnected

meter - grounded to battery

meter + connected to ; starting with "A"

A____5.01v
B____12.43v
C____ .01v
D____4.95v
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Friday, August 8th, 2014 AT 7:36 PM
Tiny
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Key in run position with engine off.
Maf harness disconnected

meter + to battery +

meter - connected to ; starting with "A"

A____7.35v
B____.01v
C____.12.37v
D____7.42v
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Friday, August 8th, 2014 AT 7:47 PM
Tiny
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I have to be honest, I'm having trouble because everything I have is off a 6 pin sensor. However, the readings you have seem okay. If you question an open, check continuity between the MAF harness and the PCM.
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Friday, August 8th, 2014 AT 9:16 PM
Tiny
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Stupid question. Did anyone make you aware that this vehicle has an 8 year or 80,000 mile emissions warranty? The MAF falls under that warranty.
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Friday, August 8th, 2014 AT 9:20 PM
Tiny
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Next available appointment within 45miles of me is August.28

I don't have any diagrams to go by. Would you mind briefly telling me which wires I should be checking?

PCM is under the windshield wipers in front correct?
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Friday, August 8th, 2014 AT 9:54 PM
Tiny
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According to my manual, pin 40 is the MAF at the PCM and pin 41 is the sig rtn.
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Saturday, August 9th, 2014 AT 7:35 PM
Tiny
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Are these accurate?
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Saturday, August 9th, 2014 AT 10:42 PM

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