Fuel pump not running right

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 8, 2023

#1

• Mar 8, 2023

• #1

I have a 01 bullitt that I can’t get the fuel pump to work right.
I have 12 volts all the way to the pump and have checked both wires from the pcm back and they work along with jumped the inertia switch but the pump won’t turn on.
Previous owner had the red/black wire grounded and that makes the pump run but it always runs as long as the key is on.
What else can I check to get this to work like it’s supposed to?
Thanks

 

Last edited: Mar 23, 2023

D

Deleted member 38176

Mar 11, 2023

#2

• Mar 11, 2023

• #2

Sounds like the previous owner screwed up the system. Get a new pump

 

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 11, 2023

#3

• Mar 11, 2023

• #3

Already did and the pump works if you ground the red/black wire but is on all the time

 

Last edited: Mar 23, 2023

weendoggy

5 Year Member

Jan 14, 2019

198

57

38

Aptos, CA

Mar 11, 2023

#4

• Mar 11, 2023

• #4

The returnless system is controlled by the CCRM and FPDM. The CCRM powers the FPDM via the Inertia Switch and sends information to the PCM and is monitored by the FRPT (fuel rail pressure tansducer). This is all sent via hyperspacelight through the PCM to modulate the pump cycles, like a variable switch. So, you have some checking to do to find out what someone did/didn't do to the system. In your case, if it's running full force all the time, it's been tampered with.

 

S

Shuttleman83

Active Member

Jun 30, 2019

239

13

28

USA

Mar 11, 2023

#5

• Mar 11, 2023

• #5

There is a ground from ECU to fuel injectors which can cut off fuel, also, the crank sensor as well. Check both.

 

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 11, 2023

#6

• Mar 11, 2023

• #6

I just don’t know what or how I should be checking on this…I hate this design and will probably never buy another like this because of the stupidity they engineered.
I have owned 21 mustangs and this is the dumbest thing I have ever came across.
Please advise how and what to check
Thankyou

 

S

Shuttleman83

Active Member

Jun 30, 2019

239

13

28

USA

Mar 11, 2023

#7

• Mar 11, 2023

• #7

You can remove the ground and clean it, try resetting your PCM for 1-2 hours via battery cable removal, also check wiring and volts to the crank sensor. And finally, check FPDM.

 

S

Shuttleman83

Active Member

Jun 30, 2019

239

13

28

USA

Mar 11, 2023

#8

• Mar 11, 2023

• #8

Have you verified the CCRM is working 100%? There is also an underhood fuse that controls fuel pump, make sure it has 12v and

Check this link below for more info.

BULLITT Archive Template

The 2001 Ford Mustang BULLITT GT.

www.bullittarchive.com

 

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 19, 2023

#9

• Mar 19, 2023

• #9

If the crank sensor wasn’t working would it not run or have other issues?
I replaced the fpdm from another known running car and still the pump will not turn on.
Is there any way of checking the pcm to see if it is operating correctly?

 

S

Shuttleman83

Active Member

Jun 30, 2019

239

13

28

USA

Mar 19, 2023

#10

• Mar 19, 2023

• #10

IIRC the crank sensor sends signal to the injectors and or the pcm when cranking, the timing of the cams with the cam sensor is important also.

 

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 19, 2023

#11

• Mar 19, 2023

• #11

It runs fine if you ground the red and black wire right by the tank. I’m wondering if the pcm isn’t sending anything to the fpdm…

 

Last edited: Mar 23, 2023

S

Shuttleman83

Active Member

Jun 30, 2019

239

13

28

USA

Mar 19, 2023

#12

• Mar 19, 2023

• #12

There is a fuel pump ground on the pcm check that out.

 

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 19, 2023

#13

• Mar 19, 2023

• #13

I cleaned the ground wires that are connected to the pcm but nothing changed…I hate ford for this dumbass idea

 

Bullitt347

I have been doing it wrong this whole time

15 Year Member

Mar 23, 2007

3,947

2,902

194

Middle of Maine

Mar 19, 2023

#14

• Mar 19, 2023

• #14

jpe said:

I cleaned the ground wires that are connected to the pcm but nothing changed…I hate ford for this dumbass idea

Click to expand...

It is only a "dumbass idea" because you do not understand it.
If you knew the reasons for why this system is used, you would appreciate why it was implemented.

 

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 19, 2023

#15

• Mar 19, 2023

• #15

So then tell me about this and why it isn’t working correctly sir

 

Bullitt347

I have been doing it wrong this whole time

15 Year Member

Mar 23, 2007

3,947

2,902

194

Middle of Maine

Mar 19, 2023

#16

• Mar 19, 2023

• #16

Did you even check the link in post #8?
It has a very detailed diagnostic routine laid out for the 01' Bullitt Mustang.
If you follow that diagnostic routine I am sure you will find the problem.

 

J

jpe

15 Year Member

Sep 23, 2007

8

0

1

Mar 19, 2023

#17

• Mar 19, 2023

• #17

Yes I did before I even made the first post but I have power to the pump it just won’t run unless the red and black wire is grounded so that didn’t help me much…
I have had 2 different fuel pumps and tanks in the car with the same result.

 

Last edited: Mar 23, 2023