Question about 1997 Ford Econoline

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Doug Blakney Apr 20, 2013 I removed the battery and box, and checked the lines. I traced the line back to engine, to the vacuum canister, and to control head. I found no leaks, or breaks in the lines.

The mode valve is new. But the control head is original. Do you think the control head could be having problems, and is what is causing the mode valve to move some while running down the road. Don't the mode valve move according to where you switch the knob on the control head. (Off, Vent, Norm. Ac, Max Ac, floor, mix, defrost, etc.)?

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  • Doug Blakney Apr 21, 2013

    Today I drove the van, and the outside temp was much warmer, 70's. I lost air through the vents on one hill, but the rest of the day, it didn't give any trouble, but at times I could hear the mode valve changing positions. I wonder if this is just a manufacturing flaw, and this is as good as it gets. It seems that when the weather is warm, the engine takes up all the vacuum, leaving the canister unfilled, or partially filled.

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Posted on Jan 02, 2017

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SOURCE: ac vent problem

the vacuum canister is located under the battery tray on this model truck, however the most common problem are the vacuum lines that run around the battery box. usually the battry will leak acid at some point in time and create holes in the small hard plastic lines. i would remove the battery and check the vacuum lines first.

Posted on Aug 18, 2008

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harley9701ha
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SOURCE: when I accelorate my ac vent goes from center

Check the white vacuum hose going to your recirculation door outside under the hood. It is located on the passenger side firewall . The hose becomed brittle and falls apart. I get small vacuum hose and cut into the wiring harness to locate a good section of hose.Put hose to vacuum motor. Good luck.

Posted on Aug 10, 2009

  • 65 Answers

SOURCE: 2001 Ford Expedition heater inop. Will not get

the problem is more than likly a vacuum leak. look under the hood on the emissions lable and find the vac line that goes to the HVAC system. if you se the leak there great otherwise unless you work in an auto shop like me what i have done is smoked a cig and blew in the line to find the leak. the smoke will escape where the leak is...

Posted on Nov 19, 2010

chuckster57
  • 1102 Answers

SOURCE: 1997 Ford F150 Air Management

The air flow is controlled by vacum. I would start by inspecting all the hard plastic vacum lines under the hood. If you find none broken or loose , then inspect the control panel. by "default" the air is derected to the defrost position.

Posted on Aug 08, 2011

Testimonial: "Helpful. I know it could be the check valve but don't know how to test it. I also don't know how to take apart the dash to get to the control panel."

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1 Answer

Why would I have plenty of vacuum at my brake booster line? But none in the smaller lines on my 1977 Mercedes 300D like the one going to my shut off valve. Rebuilt vacuum pump and the engine only has


You still have a leak somewhere or it is plugged up. The brake booster is not the culprit. Find the vacuum canister and trace from there checking each line.

Sep 10, 2012 | Cars & Trucks

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Have a 2008 Ford E450 Class C M/H with a Triton V-10. Rats chewed up a vacume line. Facing the engine, left side of the intake manifold near throttle body is a connection with two RED plastic vacume...


Same chewed red vacuum A/C damper line passenger side. splices to black line above the AC coil box. Removed battery and holder. Loosened A/C dryer mounts from inner fender. Removed fan motor. Interior passenger side lower right corner of the air input damper is the entry port for the black vacuum line. Removed clear rubber entry port weather plug/seal. Pulled the damaged black line out of the weather plug/seal. Ran a wire fish line from interior to exterior below left corner of the fan motor. Taped new line to fish tape and pulled new line into the cab. Reinserted new line into weather seal and reinstalled in reverese.5272c02f-9f6f-488e-a428-1e30a8342318.jpg719d1a3c-a72e-4a51-8201-9073ae2d31f3.jpgdbe7d6e5-21ea-4dd1-a9ec-2431f56b292c.jpgbffdab4a-8c8a-4aaa-9d1d-b9bf8c0e8fb3.jpg

Aug 05, 2011 | Ford Econoline Cars & Trucks

1 Answer

Hyundai santafe 2004 how to fix p0456...or what are ur suggestions for repair? i was advised to change the gas cap!


Here's the procedure:

Purge Control Solenoid Valve (PCSV) Line Inspection
1. Ignition "OFF".
2. Disconnect the hose leading from the PCSV to the intake manifold at PCSV.
3. Using a vacuum pump, apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve and verify PCSV holds vacuum.
4. Ignition "ON" & Engine "OFF".
5. Install scantool and select "EVAP PURGE VALVE" on the Actuation Test mode.
6. Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key.
7. Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV).
8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.
9. Is PCSV working properly?
YES
? Go to "Canister Closing Valve(CCV) Line Inspection" procedure.
NO
? Verify arrow on PCSV is pointing towards intake manifold. If it is not, reverse installation. Reinstall as necessary.
? If OK, check for cracks or damage in hose connecting PCSV and intake manifold. Repair or replace as necessary.
? If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace PCSV and go to "Verification of Vehicle Repair" procedure.
Canister Closing Valve(CCV) Line Inspection
1. Return vehicle to original condition.
2. Ignition "OFF".
3. Disconnect the hose connecting Canister Closing Valve(CCV) to canister.
4. Blow air to the canister side of the valve and verify air escapes to the air filter side.
5. Turn ignition on and jumper a wire to GND(back probe) at terminal 2 of the ECM connector(CCV valve should click).
6. Blow air into hose and verify air does not escape.
7. Repeat this procedure 4 or 5 times to ensure CCV reliability.
8. Is CCV working properly?
YES
? Go to "Fuel Tank Pressure Sensor Inspection" procedure.
NO
? Check for cracks or damage in hose connecting CCV and canister. Repair or replace as necessary.
? If OK, replace CCV. If CCV was stuck closed, inspect all lines and canister for liquid fuel. Replace any contaminated components and blow out lines and go to "Verification of Vehicle Repair" procedure.
Fuel Tank Pressure Sensor Inspection
1. Start engine and install scan tool.
2. Monitor "FUEL TANK PRESSURE" parameter on the current data list with depressing increasing engine speed.
Specification : Signal value will vary between -2mmHg to 2 mmHg depending on variation in engine speed.
A. Approx. 0~2 mmHg(2.5V) at Ig. On
B. Approx. 0 mmHg at 1400rpm .
C. Approx. -2 mmHg at 4000rpm.

3. Is signal value within specification?
YES
? Go to "PCSV to Canister Line Inspection" procedure.
NO
? Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as necessary.
? Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go to "Verification of Vehicle Repair" procedure.
PCSV to Canister Line Inspection
1. Check for leakage in hose.
(1) Disconnect the hose leading from the canister to the PCSV at canister.
(2) Using a vacuum pump, apply specified vacuum[Approx. 10cmHg(4 inHg)] to the manifold side of the valve and verify PCSV holds vacuum.
(3) Monitor vacuum pressure for 1 minute. After 1 minute, pressure should not drop more than 2cmHg(0.8 inHg).
(4) Is pressure within specification?
YES
? Go to "2. Check for leakage in canister" procedure.
NO
? Check for cracks or damage in hose connecting PCSV and canister. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for leakage in canister.


Thoroughly check all fuel vapor hoses and hose clamps between:
1. Canister and fuel tank.
2. Canister and CCV.
3. Canister and PCSV.

If NG, replace hose or clamps as necessary and go to "Verification of Vehicle Repair" procedure.
If OK, go to next step as below.
(1) Disconnect hose clamps and remove canister assembly .
(2) Block the hose of between:
A. Canister and fuel filler neck.
B. Canister and CCV.
C. Canister and PCSV.

(3) Apply maximum of 10cmHg(4 inHg) pressure through fuel tank port from canister.
(4) With system sealed and pressurized, check for leaks.
(5) Were any leak(s) found?
YES
? Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure.
NO
? Go to "Fuel Tank Line Inspection" procedure.

Fuel Tank Line Inspection
1. Relieve the fuel system pressure and remove the fuel tank.


Before removing the fuel tank, make sure the fuel hoses are not leaking.

2. Block all of the following outlets:
(1) Fuel lines.
(2) Fuel filler neck.

3. Apply maximum of 10cmHg(4 inHg) pressure to the EVAP. hose at the fuel tank. Then, pinch the EVAP. hose to retain the pressure.
4. Check the suspect area for leaks with a soap solution.
5. Were any leak(s) found?
YES
? Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure.
NO
? Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Jun 30, 2011 | 2003 Hyundai Santa Fe

1 Answer

1996 Ford Aerostar 3.0 L V-6 Constant check engine light ON Ran codes. Code says vacuum leak on fuel canister. I'd like to change all the vacuum lines. Don't have a good schematic. Haynes manual only...


what codes?

The vacuum lines run from the canister to the intake manifold. One is the purge hose to deliver stored fuel vapor to the intake to be burnd when engine is warm and you are crusing at part throttle. The other line is the vacuum line to operate it.

Fuel Vapor Valve, Aerostar (4.0L Engine) The evaporative emission valve (9B593) uses a small orifice, 1.83mm (0.072 inch), that allows vapors to pass into the vapor line running forward to the evaporative emissions canister (EVAP canister) (9D653). This evaporative emission valve mounts directly into the fuel tank (9002) using a fuel vapor separator seal. Fuel vapors trapped in the sealed fuel tank are vented through the orificed evaporative emission valve. The vapors from the fuel tank leave the evaporative emission valve through a single vapor line and continue to the evaporative emissions canister in the engine compartment for storage.
-----------------------------------------------------
Fuel Vapor Canister Purge Regulator Valve, Aerostar, Ranger Removal and Installation
  1. Disconnect wire harness from evaporative emission canister purge valve (EVAP canister purge valve) (9C915).
  1. Disconnect wire harness from thermistor.
  1. Disconnect evaporative emission canister purge valve assembly from fuel vapor canister and throttle body.
  1. To install, reverse removal procedure.
-----------------------------------------------------------------

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Mar 25, 2011 | Ford Aerostar Cars & Trucks

1 Answer

1998 saturn st wagon . engine code 0449


Computer is not getting current through the purge valve/solenoid. Check connection to valve. If good, you can either test the valve to see if it's bad (requires special equipment) or just replace the valve. Instructions for both are pasted below. The cost of the part is $40. Let me know if you have more questions.


COMPONENT TESTING Carefully check for cracks or leaks in the vacuum lines or in the canister itself. The lines and fittings can be reached without removing the canister. Cracks or leaks in the system may cause poor idle, stalling, poor driveability, fuel loss or a fuel vapor odor.
Vapor odor and fuel loss may also be caused by: fuel leaking from the lines, tank or injectors, loose, disconnected or kinked lines, or an improperly seated air cleaner and gasket.
If the system passes the visual inspection and a problem is still suspected, proceed as follows:

  1. With the ignition switch in the OFF position, unplug the electrical connector from the canister purge solenoid. Use an ohmmeter to check the solenoid coil resistance; it should be 19-31 ohms.
  2. Turn the ignition switch ON then, disconnect the vacuum line from the intake manifold and connect a hand vacuum pump to the valve.
  3. Apply a vacuum of about 10 in. Hg (34 kPa) to the hose and solenoid, then observe if the valve holds the vacuum. If the valve does not hold, apply vacuum directly to the solenoid to determine if the solenoid or hose is at fault, then replace the component which allowed vacuum to release.
  4. If the vacuum holds in the initial test, jumper the test terminals on the ALDL (terminals A and B are the test terminals and are the two uppermost right terminals of the ALDL connector), and observe if the valve activates, releasing the vacuum. If the valve does not activate and release the vacuum, replace the solenoid.


REMOVAL & INSTALLATION
Canister Purge Solenoid Valve
See Figure 2
The purge solenoid valve is mounted on the engine, towards the rear and below the intake manifold.

  1. As an added safety precaution, you may wish to disable the air bag(s), if equipped. refer to Chassis Electrical for the air bag disabling procedure.
  2. Disconnect the negative battery cable.
  3. Remove the air cleaner/intake tube assembly.
For DOHC engines, the solenoid can be reached through the access hole located next to the intake manifold support bracket.
  1. Unplug the solenoid vacuum hoses and electrical connector.
  2. Remove the attaching bolt, then remove the canister purge solenoid.

To install:
  1. Install the solenoid and tighten the retaining bolt to 19 ft. lbs. (25 Nm).
  2. Connect the vacuum lines to the solenoid, then install and push in the electrical connector until it clicks firmly into place.
  3. Install the air cleaner/intake tube assembly.
  4. Connect the negative battery cable.
  5. If necessary, enable the air bag(s). refer to Chassis Electrical .

Fig. Fig. 2: The canister purge solenoid is mounted below the intake manifold cfd22db.gif

Oct 28, 2010 | 1998 Saturn SL

1 Answer

Stuck in 4h and won't go into 2h


Sound like the vacuum line is off the IWE solenoid ( on the firewall ) or there is a problem with the vacuum reservoir ( behind the battery box ).

The IWE solenoid controls vacuum to the IWE ( Integrated Wheel Ends ) to pull the hubs out ( spring loaded to push in without vacuum ).

You can pull one of the IWE vacuum lines ( the other line is a vent that leads into the engine compartment and is open ) and test with a vacuum gauge when the switch is in the 2H position, you should have vacuum on the line.

If not, you will need to trace back the vacuum lines to find where the leak is at ( if it is what I think it is ).

This is a block diagram of the vacuum system to work from ( not the physical routing ).
52db775.jpg

This is starting point, the other problems get into the IWE itself.

Jun 03, 2010 | 2006 Ford F-150

2 Answers

I have a 2004 Chrysler Town and Country and my


P0440:
  • Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
  • Inspect the EVAP system for cuts/holes in tubes/hoses
  • Inspect for damaged or disconnected hoses around the Evap purge solenoid
  • Check and/or replace the sensor
  • Check and/or replace the purge valve
  • Have a professional use a smoke machine to detect leaks

  • P0441:
    Bad vacuum switch
    • Broken or damaged EVAP line or canister
    • Open in PCM purge command circuit
    • Open or short in Voltage feed circuit to Purge Solenoid
    • Faulty purge solenoid
    • Restriction in EVAP solenoid, line or canister
    • Corrosion or resistance in purge connector
    • Bad PCM

    Dec 21, 2009 | 2004 Chrysler Town & Country

    1 Answer

    1993 Ford Econoline E150, AC and Heat work, however I can't switch vents. All the air is shooting down at my feet. I noticed it look like air actuated switches. Is this true and could there be a hole in...


    Air diverter doors are vacuum operated. This problem is generally due to broken vacuum line. Start tracing the vacuum line from entry at the firewall back to engine. Likely goes through some type of canister, especially ball shaped and maybe through a vacuum manifold where several lines attach. Check for leak along all attaching lines all the way to vacuum source at engine manifold. If no problem found then check line from firewall to temp/climate control switches under dashboard and from switch to actuators. Can sometimes be difficult to trace but never impossible. Good luck!

    Jun 22, 2009 | 1993 Ford Econoline

    1 Answer

    2005 f350. Heater works but can't get air to flow out of leg vents....even when specifying leg vents on instrument panel.


    If air is coming thru defroster then you have a vacuum leak.Defrost is the default postion(no vacuum).Look under hood on the passenger side next to heater core area and see if you can find the small black vacuum line going thru the firewall.Trace it back to the vacuum canister on right side of engine or fender well and make sure nothing is disconnected or leaks in the line and trace it from canister back to the source also.

    Mar 02, 2009 | 2005 Ford F 350 Super Duty

    1 Answer

    Ac vent problem


    the vacuum canister is located under the battery tray on this model truck, however the most common problem are the vacuum lines that run around the battery box. usually the battry will leak acid at some point in time and create holes in the small hard plastic lines. i would remove the battery and check the vacuum lines first.

    Aug 14, 2008 | 2001 Ford F150 Styleside SuperCrew

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