Question about 2004 Subaru Forester

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Vacuum leaks 2004 subrau forrester - 2004 Subaru Forester

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Don't see a question with details there

Vacuum Leaks can be from the gas tank
to the engine to the exhaust

Have to smoke test for vacuum leaks

Posted on Nov 13, 2014

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Posted on Jan 02, 2017

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2004 saturn ion,2.2 ecotect replaced the air temop sensor, reset timing, replaced coil tower, has rought idling, loose of power shaking runs like ...


Lloyd; sounds like vacuum leak, i use starter fluid (CAREFULLY)to locate vacuum leaks. Also on the 2.2 ecotec fuel dirty stuck injectors can do this, while car is running, give a sharp 2 or 3 raps on injectors one at a time, listen for engine noise change,
check links below.
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How To Find Vacuum Leak EricTheCarGuy

ENGINE VACUUM LEAKS Easy tips on finding them

How to find vacuum leaks and easily


How to Diagnose Misfire Codes GM 2 2L


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there is no drain plug the only drain is on the back of firewall passenger side below a/c blower housing

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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

Engine Light on Steady, Cruise control light on Strobing. All fuses OK, Gas cap OK. Cruise Control Button not working. Forrester XT 2004. What could be the problem?


check engine light has to be off for cruise to work thats how they made the car i dont like that but thats how it is

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2004 Ford F150 Airconditioning wont blow through panal vents only through defrost but vent works


check vacc line from engine into fire wall. behind batt is where they normally crack and leak. possible from a leaking batt at one time. check black supply vacc line right behind battery

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2005 Subaru Outback - cruise control cuts out when turn signal is used. This problem is intermittent, but increasingly persistent.


This is an ongoing problem with the 2005 subrau. Mine went out seven time in a period of three years. Traded it for a 2008. Take it back to the Subrau dealer or write to Subrau. If yoou raise enough hell they will replace the unit. They replaced mine seven times.

Jun 28, 2009 | 2005 Subaru Outback

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