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2004 Jeep Grand Cherokee Limited DIAGNOSIS AND TESTING – VACUUM RESERVOIR

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Filed Under (Jeep) by admin on 18-11-2010

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1. Disconnect vacuum hose at speed control servo and install a vacuum gauge into the disconnected hose. 2. Start engine and observe gauge at idle. Vacuum gauge should read at least ten inches of mercury. 3. If vacuum is less than ten inches of mercury, determine source of leak. Check vacuum line to engine for leaks. Also check actual engine intake manifold vacuum. If manifold vacuum does not meet this requirement, check for poor engine performance and repair as necessary. 4. If vacuum line to engine is not leaking, check for leak at vacuum reservoir. To locate and gain access to reservoir, refer to Vacuum Reservoir REMOVAL /INSTALLATION . Disconnect vacuum line at reservoir and connect a hand-operated vacuum pump to reservoir fitting. Apply vacuum. Reservoir vacuum should not bleed off. If vacuum is being lost, replace reservoir. 5. Verify operation of one-way check valve and check it for leaks. a. Locate one-way check valve. The valve is located in vacuum line between vacuum reservoir and engine vacuum source. Disconnect vacuum hoses (lines) at each end of valve. b. Connect a hand-operated vacuum pump to reservoir end of check valve. Apply vacuum. Vacuum should not bleed off. If vacuum is being lost, replace one-way check valve. c. Connect a hand-operated vacuum pump to vacuum source end of check valve. Apply vacuum. Vacuum should flow through valve. If vacuum is not flowing, replace one-way check valve. Seal the fitting at opposite end of valve with a finger and apply vacuum. If vacuum will not hold, diaphragm within check valve has ruptured. Replace valve.

2005 Chevrolet Malibu Vacuum Brake Booster Check Valve and/or Hose Replacement Removal Procedure

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Filed Under (Chevrolet) by admin on 19-10-2010

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1. Disconnect the brake booster vacuum check valve (1) from the brake booster. 2. If the vacuum check valve (1) needs to be separated from the vacuum hose (3), release and reposition the clamp (2) on the vacuum hose (3) and remove the check valve (1) from the hose (3). 3. If replacing the vacuum check valve (1), remove the grommet (4) from the brake booster and discard the grommet. 4. If removing the vacuum hose (2), take note of the vacuum hose routing then disconnect from the engine intake manifold connection (3) by releasing tension on the vacuum hose clamp (1) and sliding the vacuum hose (2) off the intake manifold connection (3). Installation Procedure Important: A small amount of denatured alcohol can be used as an assembly aid when installing the vacuum check valve and/or grommet. Do NOT use soap. 1. If the vacuum hose (2) was removed, install the vacuum hose into position on the vehicle as noted prior to removal, then connect the vacuum hose (2) to the engine intake manifold connection (3) and secure with the vacuum hose clamp (1). 2. If the vacuum check valve (1) is being replaced, install a NEW grommet (4) to the brake booster. 3. If the vacuum check valve (1) was separated from the vacuum hose (3), install the check valve (1) to the vacuum hose (3). Install and secure the clamp (2) into position on the hose (3). 4. Connect the brake booster vacuum check valve (1) to the brake booster.

Ford / Mercury / Lincoln Band-Mounted Sensor Re-Learn Instructions

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Filed Under (Ford, Lincoln) by admin on 17-10-2009

The instructions below can be used for the following vehicles: 2008 Ford Crown Victoria / Lincoln Town Car / Mercury Grand Marquis 2008 Ford E-series 2007-2009 Ford Edge / Lincoln MKX 2005-2008 Ford Escape / Mercury Mariner 2007-2009 Ford Expedition / Lincoln Navigator 2006-2009 Ford Explorer / Lincoln Aviator / Mercury Mountaineer 2007-2008 Ford F150, F250, and F350 / Lincoln Mark LT
2009 Ford Flex 2008-2009 Ford Focus 2006-2007 Ford Freestar / Mercury Monterey 2008-2009 Ford Fusion / Lincoln MKZ / Mercury Milan 2007-2009 Ford Mustang 2007-2009 Ford Ranger 2008-2009 Ford Taurus / Mercury Sable

1. Make sure all tires are inflated to the vehicle’s recommended inflation pressures (found in the owner’s manual on the door placard). 2. Turn the ignition switch to OFF then press and release the brake pedal. 3. Turn the ignition switch from OFF to RUN (engine OFF) 3 times, ending in the RUN position. Do this within 10 seconds. 4. Press and release the brake pedal

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2005 Ford Expedition, Ford F-250, Ford F-350 TICKING AND/OR KNOCKING NOISE FROM ENGINE

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Filed Under (Ford) by admin on 07-09-2010

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FORD: 2005 Mustang 2004-2005 F-150 2005 Expedition, F-250, F-350 This article supersedes TSB 05-15-8 to update the Service Procedure. ISSUE Some vehicles equipped with a 4.6L 3-valve or 5.4L 3-valve engine may exhibit a ticking and/or knocking noise after reaching normal operating temperature. The noise may be described as “ticks”, “taps”, “knocks”, or “thumps”. In some cases the noise may be a normal characteristic of these engines. In other cases the noise may require further investigation. Sorting out and defining the noise as reported by the customer is important to successfully diagnose and/or repair the condition. ACTION Before starting diagnosis, it is critical to determine the specific engine noise the customer is concerned with. The customer should be interviewed to get their detailed perception and description of the noise, and to determine if the noise occurs at idle or above idle speed, and if the engine is cold, hot, or both. Attempt to duplicate the noise, and determine the source of the symptom. Refer to the following Service Procedure to help determine the source of the noise and if a repair is needed. LINCOLN: 2005 Navigator PRE-CHECKS 1. 2. 3.

1991 Volkswagen Passat Vacuum Diagrams

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Filed Under (volkswagen) by admin on 07-10-2010

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Cabriolet, Corrado, Fox, Golf GL/GTI, Jetta, Passat, Vanagon INTRODUCTION This article contains underhood views of vacuum hose routing. Use these vacuum diagrams during the visual inspection of F – BASIC TESTING article. This will assist in identifying improperly routed vacuum hoses which cause driveability and/or computer-indicated malfunctions. Fig. 1: Fox Vacuum Diagram Fig. 6: Cabriolet Canister-to-Intake Manifold Vacuum Diagram Fig. 7: Canister-to-Intake Manifold Vacuum Diagram (CIS–E Motronic System)