Question about 2004 Ford F150

Open Question

I have a 2004 f150 with a 5.4 3v engine and both banks are running lean. I have done some research on line and have found that I have a rear vacuum line undone. It has 2 small red lines running into a 90 deg rubber elbow. It is undone and I can not find where it plugs back in. It is super tight between the rear intake and firewall. Please help.

Posted by on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

SOURCE: My 1996 F150 says PO174What does it mean

bank two is on the drivers side. cylinders 1234 right side, Bank 1, 5678, bank 2. you have something like a vacuum leak effecting one side only. Not all code readers come up with all the codes. Its possible you have other codes possibly on the bank 1 side also. If you have a K/N filter it could of deposited oil on the MAF sensor on the intake there or you may have a clogged air filter. . If you really only have one code for one side you may have an intake gasket leaking or the egr may be stuck open a little which could effect the idle quality.

Posted on Jul 16, 2009

  • 119 Answers

SOURCE: Code #P0171 & code #P0174

The most common problem on a Ford with these codes is deteriorated PCV hoses. Check the hoses from the PCV valve to the intake manifold. Pay special attention to the rubber elbows. They often crack on the inside curve and the crack is hard to see.

Posted on May 22, 2008

  • 1 Answer

SOURCE: location of O2 sensor in bank 2, 99 5.4 expedition, running lean

I have a ford 2003 windstar that was running very rough when cold and almost stalling. engine light came on. went to autozone and they read the codes for free and told me it was running lean on Bank 2 also. i came home searched for the O2 front sensors online using the info autozone gave me. there are 2 front sensors on my car that need to be replaced at the same time. look for ones that have a direct plug in and don't need wire splicing. the ones without the wiring harness are cheaper but more of a pain, i think.
they were fairly easy to replace. getting access with the wrench was the worst. reset the light by disconnecting the battery for a few minutes. seems fine now and the light hasn't come back on.

Posted on Jan 25, 2009

  • 59 Answers

SOURCE: 97 Ford Ranger 4.0L V6 Idles rough only when cold

Orand

Ther is a air Idle control valve located on the side of the throttle body. unplug it remove it spray it and clean it with carb cleaner replace it plug it back in and you will be a Happy person again.

Lugnut61

Posted on Feb 01, 2009

  • 101 Answers

SOURCE: intermittent high idle F150 5.4 1998

u may have an intake leak take carb cleaner while motor running spray lightly around the intake the idel will raise if leak present

Posted on Mar 02, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

What does code p1131 mean on a 2001 ford taurus


P1131 Ford
P1131 Ford - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1

Repair Importance Level: 3/3

Repair Difficulty Level: 2/3

http://engine-codes.com/p1131_ford.html

Forum Code

Possible causes

- Faulty Oxygen Sensor

- Vacuum leak affecting bank 1 only

- Fuel injector problem bank 1

- Check for cylinder misfire on bank 1

- Engine mechanical condition

Tech notes

Though the Oxygen (O2) sensor, the Engine Control Module (ECM) has detected a lean system, which means that there is either not enough fuel or and excessive amount of air in the system. Start by checking for vacuum leaks.

When is the code detected?

The Engine Control Module (ECM) detected bank 1 oxygen (O2) at its lean limit

Possible symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

P1131 Ford Description

A Heated Exhaust Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

Read more: http://engine-codes.com/p1131_ford.html#ixzz3izk89wMu

Aug 16, 2015 | Ford Cars & Trucks

3 Answers

2002 gmc envoy 4.2 liter 6 cyl code reads bank 1 too lean


too lean can be from leaking manifold, vacuum leak, injectors on that bank, low fuel pressure

Aug 02, 2015 | GMC Cars & Trucks

1 Answer

I have engine codes 171 and 174 engine is running fine how do i repair thease codes


Check vacuum lines. Codes are for O2 sensors. bank one and two running lean. Make sure the air plenum is tight to the throttle body.

Apr 12, 2015 | 2004 Chrysler Crossfire

1 Answer

2004 f150 5.4 issues with engine running smooth


2 things. The most simple is an air leak in the intake. The engine is getting the same fuel as always, but the additional air is giving you a higher air/fuel ratio. Start the engine, use a pump spray water bottle and mist the intake manifold and any vacuum lines. A change in rpm will reveal a leak. You have a lean knock.

Next, more intense. Look up "Cam Phasers" The knock is a typical clue for this problem. But since the water test above does not cost you anything to try, I mentioned it. I bet the knock disappears around 2000rpm.

What is happening inside your engine is one side is out of time or synch with the other. This is because each "Cam Phaser" sets timing separately for each bank. After 2000rpm the parts are fully extended and the noise disappears.

There are just 2 ways to fix this. Clean the "Cam Phaser" with a solvent that degunks the block or change the Phaser and assume that the bad bank is the one showing lean.

The replacement can be done with a Cheater method or complete frontal disassembly of the engine. A specialty tool is needed for the cheater method(buy, beg, borrow) and one side will probably cost $800. A frontal job, both Phasers is easily $2400.

You might try Risolone, or go to Ford for a Factory chemical. There are also 15 minute cleaners. Replacing oil, filter, and chemical cleaner will be in the $50 range. Might save $800 repair.

May 31, 2014 | 2004 Ford F150

1 Answer

2005 ford taurus running too lean


This would probably be an air leak. Check all engine seams and vacuum lines with the engine running. Take a spray bottle filled with water and when the engine draws in the water spray, the RPM will change.

Jan 30, 2014 | Ford Cars & Trucks

1 Answer

Fuel Trim Malfunction Bank 1 and 2!


Bank lean left and right, right?

I had this on a different vehicle, but the problem and repair might be similar. It was on a friend's Explorer.

Engine codes showed both banks lean, and I think the codes were even the same numbers. Everything I found said MAF, which you've changed already. There was also info about injectors, but leave that for later.

What I found, and may be the problem here, is a vacuum leak. On that vehicle, I found one hose that I replaced. I also changed the fuel filter. Have you done that yet? I changed the fuel filter, and when I dumped the fuel out of it, it started clear, but quickly started pouring nasty, black, dirty fuel out the inlet side of the filter. It's possible that the filter was clogged enough to reduce flow and cause a lean condition.

The other thing was that vacuum line. Up and down at idle could be the heating and cooling cycle of the broken hose affecting the amount of air getting in the hole.

How to find vacuum leaks:
I've always been told to start at one end of a vacuum system and move forward from there. With the engine running, spray some WD-40 progressively along the lines. You're listening for a change in the idle of the engine. The WD40 will get into the crack and momentarily block the air thru the crack. When the engine changes, focus on that area of the line. The change could be small and quick, so pay close attention and go slow. Respray if you're not sure. There may be more than one area that needs attention, but hopefully it's something readily apparent.

Hope this helps.

Good luck! :)

Apr 19, 2013 | Mitsubishi Eclipse Cars & Trucks

2 Answers

Obd code system to lean bank 1&2


Lean on Bank 2 means one side of the engine is getting less fuel or too much air. I also own a 4.0L and I work on these models for this code consistantly. Usually if you have a vacuum leak at the pcv valve hose behind the throttle body you will get a lean Bank 1 and 2.
My recommendation in these cases would be to change the PCV valve (helps with your gas milage) and the fuel filter; other than that you will have to be sure the fuel pressure is correct and there is no vacuum leaks on the driver side of the engine. I am 90 percent sure the fuel filter, pcv valve and clearing the codes will correct this issue.

Here I find one TSB...
MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - SYSTEM LEAN DIAGNOSTIC TROUBLE CODES (DTC'S) - SERVICE TIPS

FORD:
2000 Contour
2000-2002 Escort
2000-2003 Escort ZX2
2000-2004 Crown Victoria, Focus, Mustang, Taurus
2002-2004 Thunderbird
2000-2003 Windstar
2000-2004 Econoline, Excursion, Expedition, Explorer, F-Super Duty, Ranger
2001-2004 Escape
2004 Freestar
2000-2004 F-Series

LINCOLN:
2000-2002 Continental
2000-2004 LS, Town Car, Navigator
2002-2003 Blackwood
2003-2004 Aviator

MERCURY:
2000 Mystique
2000-2002 Cougar
2000-2004 Grand Marquis, Sable, Mountaineer
2004 Monterey

ISSUE: This article is intended to aid in diagnosing DTC's P0171, P0174, P1130, P1131, P1150, P1151, P2195, or P2197 (system lean or lack of HEGO switches) when a vacuum leak is present. HEGO sensors, MAF sensors, and PCM replacements are not an effective repair when a vacuum leak is causing the above DTC's.

ACTION: Perform the following inspections/repairs when the above codes are found in memory. Procedure provides instructions on how to make comparisons of the total fuel corrections (using scan tool or equivalent) at idle and high RPM's to help determine if a vacuum leak is the root cause of the DTC's.

SERVICE PROCEDURE:
NOTE FREEZE FRAME AND ADAPTIVE FUEL VALUES (ASSOCIATED WITH "LONGFT" PID) WILL NOT BE AVAILABLE IF A KAM OR OBDII RESET WAS RECENTLY PERFORMED.

NOTE FREEZE FRAME DATA WILL INDICATE THE ENGINE AND AMBIENT CONDITIONS WHEN THE DTC WAS SET. THESE ARE IMPORTANT BECAUSE THE VACUUM LEAKS MAY OCCUR ONLY WITHIN SPECIFIC TEMPERATURE RANGES AND MUST BE DUPLICATED TO DETECT THE LEAK.

NOTE FUEL TRIMS AT IDLE ARE PARTICULARLY SENSITIVE TO VACUUM LEAKS SINCE THE UN-METERED AIR LEAKAGE FLOW IS A HIGHER PERCENTAGE OF TOTAL AIRFLOW AT IDLE THAN AT PART THROTTLE. THE BAROMETRIC PRESSURE (BP) PID IS NOT RECOMMENDED TO VIEW WHEN DIAGNOSING A VACUUM LEAK. BP IS AN INFERRED PID CALCULATED DURING HIGHER ENGINE LOADS.

Jan 20, 2012 | 1996 Ford Explorer

1 Answer

My engine light is on and the codes are reading system to lean bank 1 and 2. The code are p0171 and p0174


This is sign of a vacuum leak (possible off of the PCV system). This causes additional air to be introduced into the engine causing the fuel mixture to lean out. With the engine running, shoot short burst of starting fluid around the vacuum lines. When the engine revs briefly, you have found (at least one of) your leaks.

Jan 07, 2011 | 2003 GMC Yukon Denali

8 Answers

1996 T100 Toyota, will not start when hot, will start when cold but the engine light is on. Code says LB running lean? Allready replaced converter and sensors.


First thing that needs to be checked is the abscence of spark when it will not start. Running lean could be a vacuum leak on the left side or perhaps a clogged injector. How does it run when it does start?

Nov 01, 2010 | 1996 Toyota T100

1 Answer

Engine codes run on 2004 Freestar


Make sure you have all the vacuum leaks repaired.
Disconnect the battery for two mins,codes my clear.
The codes you got are O2 Sensors,because of the vacuum leak,which leaned out the readings and set the codes.

May 03, 2010 | 2004 Ford Freestar

Not finding what you are looking for?
2004 Ford F150 Logo

Related Topics:

128 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5501 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...