• Mustang Forums
  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2009 Specific Tech

Fuel P0191, P0171 & Found Rusty Fuel - Support Needed

  • Thread starter Thread starter Henning
  • Start date Start date Aug 15, 2016
  • Tags Tags
    mustang fuel filter rusty red sensora bank1
H

Henning

New Member
Aug 15, 2016
3
0
1
Aug 15, 2016
#1
  • Aug 15, 2016
  • #1
Hello all,

I am new to this forum but I bought my 2005 Mustang GT already 1 year ago with 39k miles. I recently had an issue where the car would not accelerate on the highway so I had to stop on the shoulder. There I noticed that the engine had a shaky idle and the Check engine light came on.
After shutting off and waiting a few minutes everything was fine for another few miles until the same thing happened...

The failures codes I read were:
P0171: Bank1 system too lean
P0191: Fuel rail pressure, sensor A circuit Range/performance

I was hoping it would only be a clogged fuel filter but upon replacing that I found the fluid that poured out of the IN-side of the filter was very rusty.
I dont want to give it to the shop and have them replace the fuel pump.
Anyone has an idea what is going on here? Should I just start with a tank cleaning?

THanks for your support, if it will work I could also upload a Video of me pouring the fuel from the filter....
 
H

Henning

New Member
Aug 15, 2016
3
0
1
Aug 16, 2016
#2
  • Aug 16, 2016
  • #2
Attached a picture of the rusty fuel:
 

Attachments

  • image.webp
    72.1 KB · Views: 311
H

Henning

New Member
Aug 15, 2016
3
0
1
Aug 16, 2016
#3
  • Aug 16, 2016
  • #3
Ok, Took out the fuel pump to check the inside of the tank. the tank is a bit corroded and the filter Mat of the pump was partly clogged by corrosion particles....
Has anyone ever seen something similar?
New tank , new pump or what should I do?
 

Attachments

  • image.webp
    105.5 KB · Views: 336
  • image.webp
    166.6 KB · Views: 304
  • image.webp
    181 KB · Views: 303

SpartaPerformance

10 Year Member
Nov 5, 2006
2,517
61
89
Long Island NY
Aug 21, 2016
#4
  • Aug 21, 2016
  • #4
Found similar condition on a customer GrandNational the we opted to replace the tank it was inexpensive enough. I'm not sure what a tank costs to replace for an S197 but they can be sent out to be cleaned hopefully it will solve that concern. BTW I would also change gas stations
 
You must log in or register to reply here.

Similar threads

D
Is this a fuel filter?
  • Dutch74
  • Oct 2, 2025
  • 1974 - 1978 Mustang II Talk & Tech
Replies
7
Views
280
1974 - 1978 Mustang II Talk & Tech Oct 21, 2025
welder4956
M
01 mustang 3.8 fuel pressure issue
  • Mhaley2006
  • May 29, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
82
1996 - 2004 SN95 Mustang -General/Talk- May 29, 2026
Mhaley2006
M
Zero fuel pressure @ Shrader, but over 100 PSI at filter
  • Stang337
  • Jul 5, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
5
Views
363
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 10, 2025
JD1964
K
Engine 2000 Mustang GT - Fuel issue post-blown spark plug repair
  • kenster1092
  • Feb 26, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
295
SN95 4.6L Mustang Tech Mar 10, 2026
kenster1092
K
T
Fuel Fuel Filter
  • Treachery
  • Apr 19, 2024
  • Fox 5.0 Mustang Tech
Replies
1
Views
592
Fox 5.0 Mustang Tech Apr 19, 2024
General karthief
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2009 Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?