How to repair leak in vacuum line, Ford Excursion 2000

check vacuum lines also i believe this vehicle has an electric vacuum pump on the passenger side fender [ in engine compartment] you should see a black ball/canister with lines that go to the pump . if not will still have a canister and lines that run to the intake manifold , or could just be as simple as a fuse

Ford Excursion (2000-2005) fuses and relays

Fuse Box Diagrams https://fuse-box.info > ford > ford-excursion-2000-20...

In this article, you will find fuse box diagrams of Ford Excursion 2000, 2001, 2002, 2003, 2004 and 2005, get information about the location of the fuse panels ...

Ford Excursion (1999 - 2005) - fuse box diagram

Auto Genius https://www.autogenius.info > ford-excursion-1999-2...

Jul 2, 2018 - Ford Excursion (1999 - 2005) - fuse box diagram. Year of production: 1999, 2000, 2001, 2002, 2003, 2004, 2005 ...

Here are the warning signs of a bad fuel pump for your Ford:

• Engine "chokes" or struggles to maintain speed.
• Noises, backfires and a sputtering engine.
• Hesitation at start or take-off.
• A bad fuel pump can overheat, causing the engine to overheat.
• Any of the above issues along with a "Check Engine" light.

2000 Ford Excursion Fuel Pump Replacement Prices & Cost ...

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Could have a leaking injector. Or fuel line with a small hole or crack,

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.

The first things to check are the vacuum hoses going to the front knuckles, they are known to break and leak.You could have a broken hose, a bad vacuum solenoid, or something else causing a big vacuum leak when you engage the ESOF.

It's usually not a "hub going out". Check for broken vacuum lines from the vacuum solenoid on the passenger-side inner fender, going to a "T", and down to the front hubs. If you have one, use a hand-vacuum-pump to pull vacuum on the line going from the vacuum solenoid to the front hubs. If it holds vacuum, the vacuum solenoid needs to be replaced.

P1131----- H2Os-11 running lean.
Here are some possible causes:
Dirty or malfunctioning mass air flow sensor ( mounted in the air intake hose that goes from the air filter to the throttle plate).
Vacuum hose leaking
Intake manifold gasket leaking air
Low fuel pressure
Dirty fuel injectors
This is where testing has to be done to pin point the cause without having to replace things you don't need to.

1 Ignition system not operating properly
2 Dirtyor clogged fuel injector(s).
3 Low fuel pressure. Check for proper operation of the fuel pump and for restrictions in the fuel filter and lines.
4 Fuel injectionor engine control systems malfunction.
5 Vacuum leak at the intake manifold or vacuum hoses.
6 Restricted air filter.
7 Fuel pump or pressure regulator defective.

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1. Intake manifold vacuum leaks. Make sure all mounting bolts/nuts are tight and all
2. vacuum hoses connected to the manifold are attached properly and in good condition.

1. Check for Insufficient fuel pressure.

1. Fuel injection or engine control systems malfunction.

I hop that helps.

Ethanol gas syndrome/ buy a can of SEAFOAM(parts store). change out the fuel filter. add SEAFOAM to full tank of PREMIUM gas. let it idle(even if you have to make it by acceleration in park)/ drive 10 miles, replace fuel filter again at 500 miles. add can of SEAFOAM every 3-5000 miles, and it will clean fuel,emission, and engine valves.<p>
ethanol produces a goop(like choc milk) and creates water in the system/ It causes carbon build up and even affects injectors. If you will try this, it will help prevent costly repairs/ cost 8-9 dollars for the SF. whole lot cheaper than an engine job. good luck.

the main vacuum hose is at the main intake frame at the top of the engin


but the vacuum lines for the vacuum systeme are more than one which one you main.
any way use this methode to check for leaking hoses.
A small piece of vacuum hose (1/4-inch inside diameter) can be used as a stethoscope to detect vacuum leaks. Hold one end of the hose to your ear and probe around vacuum hoses and fittings, listening for the
"hissin'g" sound characteristic of a vacuum leak.

(It's quite common for vacuum hoses,especially those in the emissions system, tobe color coded or identified by colored stripes molded into them. Various systems require hoses with different wall thickness, collapse resistance and temperature resistance.

When replacing hoses, be sure the new ones are made of
the same material.

Often the only effective way to check a hose is to remove it completely from the vehicle.

If more than one hose is removed, be sure to label the hoses
and fittings to ensure correct installation.

When checking vacuum hoses, be sure to include any plastic
T-fittings in the check. Inspect the fittings for cracks and
thehose where it fits over each fitting for distortion, which
could cause leakage.
. Warning: When probing with the vacuu hose stethoscope, be careful not to
come into contact with moving engine components such as drivebelts, the cooling fan, etc.