Question about 2007 Volvo V40

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If it is valve gaskets where is pressure coming from and what siz

Refer earlier question , V40 1998 not 1997

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  • Roger Recordon May 03, 2010

    Brilliant, all makes sense and now clear thanks to you


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  • 15 Answers

Plugged crank case vent or egr valve or
maybe too much blow by because of worn rings

Posted on Apr 30, 2010

Testimonial: "thank you, don;t know what ''egr valve means.??"

  • rbonner904 May 03, 2010

    Sorry. I hate acronyms, and then I use one.

    EGR= Exhaust Gas Recirculation

    I wrote EGR when I ment Crank Case Vent valve.

    It is a valve , usually in a valve cover with a hose going into the intake manifold. It vents crank case blowby into the intake to burn it instead of dumping it into the atmosphere. If the check valve gets stuck closed, pressure builds up and make a leak.


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Why would i have excessive crankcase pressure 1990 350 tbi

if your referring to increased oil pressure-check for a clogged or defective pcv valve--- if good and vehicle is not running well possible damage to one or more piston /piston rings or head gasket need to do a compression test-

Jun 16, 2016 | 1989 Chevrolet G30

1 Answer

Infiniti qx4 2001, 3.5l. mechanic is unsure of reason to engine sound. Only details is 3x errors (#P0135, #P1140 & P1145) and no/low oil pressure to top part of engine even at 2000rph. Any ideas?

code p 1140 refers to camshaft variable valve timing sensor, bank 1range performance problem===causes---wiring, camshaft variable timing sensor--ECM
code p 1145 is the same but on bank 2
I came across a site which is a forum page that explains that oil pressure problems were attritubited to a failed gasket in the timing cover
I suggest you read this as the fault codes indicate a lack of oil pressure rather than a sensor problem as what you have stated
It is a problem in that the gasket was paper and after a perios blew out and now the replacement gasket is re-enforced by nissan to prevent further problems

Jan 25, 2016 | Infiniti Cars & Trucks

1 Answer

What is Pc171 Code

It's P0171 & P0174 not Pc 171 & Pc174 ! The engine computer has detected a lean condition ! That mean's it's not getting enough fuel or has a vacuum leak , bad O2 sensor ! fuel pump getting weak . fuel pressure regulator weak !
P0171 - System to Lean (Bank 1) The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information. Air Measurement System
  • MAF sensor (contaminated, damaged, malfunctioning, etc.)
Fuel System
  • Fuel pressure regulator (leaking, malfunctioning, etc.).
  • Fuel filter plugged, dirty.
  • Fuel pump (weak, check valve leaking, etc.).
  • Leaking/contaminated fuel injectors.
  • Low fuel pressure or running out of fuel.
  • EVAP canister purge valve leaking (when canister is "clean").
  • Fuel supply line restricted.
  • Fuel rail pressure sensor (incorrect reading).
Air Induction System
  • Air leaks after the MAF.
  • Vacuum Leaks.
  • PCV system (leak, valve stuck open, etc.)
  • Improperly seated engine oil dipstick.
Exhaust System
  • Exhaust leaks before or near the HO2Ss (exhaust manifold gasket, mating gaskets, etc.).
EGR System
  • EGR valve tube/gasket leak
  • EVR solenoid vacuum leak
Secondary Air Injection
  • Damaged/malfunctioning secondary air injection system (mechanically stuck valve).
  • P0174 - System to Lean (Bank 2) The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information. See Possible Causes for DTC P0171. See Diagnostic Aides for DTC P0171
View Freeze Frame Data to determine operating conditions when DTC was set. Observe LONGFT1 and 2 PID(s). Refer to Section 2 , Adaptive Fuel DTCs Diagnostic Techniques for more information.

Feb 12, 2015 | 2002 Ford Escape

1 Answer

2004 jeep code 1763 what to do

P1763 - Governor Pressure Sensor Voltage Too High

This code is refer for the governor pressure sensor which is located in the valve body of the transmission. If getting power to the sensor and the wires are not open or shorted then the sensor will need to be replaced.


Hoist and support vehicle on safety stands.
Remove transmission fluid pan and filter.
Disengage wire connectors from pressure sensor and solenoid (see picture)
Remove screws holding pressure solenoid retainer to governor body.
Separate solenoid retainer from governor (see picture)
Pull solenoid from governor body
Pull pressure sensor from governor body.
Remove bolts holding governor body to valve body.
Separate governor body from valve body
Remove governor body gasket.

Before installing the pressure sensor and solenoid in the governor body, replace O-ring seals, clean the gasket surfaces and replace gasket.

Place gasket in position on back of governor body
Place governor body in position on valve body.
Install bolts to hold governor body to valve body.
Lubricate O-ring on pressure sensor with transmission fluid.
Align pressure sensor to bore in governor body.
Push pressure sensor into governor body.
Lubricate O-ring, on pressure solenoid, with transmission fluid.
Align pressure solenoid to bore in governor body
Push solenoid into governor body.
Place solenoid retainer in position on governor
Install screws to hold pressure solenoid retainer to governor body.
Engage wire connectors into pressure sensor and solenoid Install transmission fluid pan and (new) filter.
Lower vehicle and road test to verify repair.





Hope helps.

Sep 29, 2011 | 2004 Jeep Grand Cherokee

1 Answer

What is P 1491 in Nissan pathfinder 2003 and how to fix it



1. Confirm the Vacuum Cut Valve is installed correctly


^ The Vacuum Cut Valve will not work correctly and a DTC will be stored if it is installed upside-down.

^ The Vacuum Cut Valve is a white plastic valve near the fuel tank and EVAP canister.

2. Connect CONSULT-II and turn the ignition key to "N" (do not start the engine).


4. Note the EVAP System Pressure Sensor Voltage Confirm that it is reading in a normal range for a key ON arid engine OFF condition.

NOTE :For 2001 models and earlier:

^ Voltage in step 4 should be near 3.36 volts.

^ The normal range is between 3.32 - 3.40 volts.

For 2002 models:

^ Some 2002 models use a new type EVAP System Pressure Sensor with different operational characteristics.

^ Refer to the EC section of the appropriate Service Manual to determine which type sensor your vehicle is equipped with.

^ Models that use the new type EVAP System Pressure Sensor will have a voltage reading that varies with changes in the "barometric" pressure (atmospheric air pressure that changes with altitude and/or weather conditions).

^ The usual voltage range obtained in step 4 with the new type EVAP System Pressure Sensor is between 3.8 and 4.2 volts. Because this range will vary with barometric pressure, it is best to compare readings with a known good vehicle.

^ Some 2002 models use the earlier type EVAP System Pressure Sensor (same as used on 2001 and earlier models). The normal range for the earlier type is 3.32 to 3.40 volts and does not vary with barometric pressure.

5. Start the engine. Observe the EVAP System Pressure Sensor voltage.

^ If the value has reduced 0.04 volts or more from the reading obtained in step 4, the EVAP Canister Purge Volume Control Solenoid Valve may be leaking.

^ Refer to the EC section of the appropriate Service Manual for inspection procedures of the EVAP Canister Purge Volume Control Solenoid Valve, DTC P1444.

NOTE :The EVAP Canister Purge Volume Control Solenoid Valve is located in the engine compartment.

6. Perform the DTC Confirmation Procedure for DTC P1491. Refer to the EC section of the appropriate Service Manual for confirmation procedure steps and driving conditions.

7. If the DTC confirmation results are NG, do the following:

a. Refer to the EC section of the appropriate Service Manual to determine if the vehicle is equipped with On-Board Refueling Vapor Recovery (ORVR).

^ If the vehicle has ORVR, go to b.

^ If the vehicle does NOT have ORVR, go to step 8.

b. Place a clamp on the Refueling EVAP Vapor Line near the fuel tank. The Refueling EVAP Vapor Line is the larger hose (see figure 2). Use hose clamp (3M P/N # 08556-1), found in Fuel Injector Cleaning Kit J-45701, or equivalent.

c. Retry DTC Confirmation Procedure

d. If the result is now OK, the Refueling Control Valve may be leaking and should be inspected. Refer to the EC section of the appropriate Service Manual for Refueling Control Valve inspection procedures.

8. If the DTC confirmation is still NG after step 7, or the vehicle is not equipped with ORVR, do the following:

a. Disconnect two (2) lines from the Vacuum Cut Valve. One that goes to the fuel tank and one that goes to the EVAP Canister (see figure 1).

b. Use a hand vacuum pump to check each of the two (2) disconnected hoses for free flow. Make sure they are clear into the fuel tank (vent line) and into the EVAP Canister (see figure 2).


^ Figure 2 includes ORVR system. Refer to the appropriate service manual to determine if your vehicle has ORVR or not.

^ The lines between the Vacuum Cut Valve and Fuel Tank, and between the Vacuum Cut Valve and EVAP Canister may go through a metal line. Make sure the lines are clear between the Vacuum Cut Valve and Fuel Tank, and between the Vacuum Cut Valve and EVAP Canister, including any metal lines.

c. If any blockage is found, determine the cause and repair as necessary. Blockage in either of these lines will cause a DTC.

9. If all of the above checks do not locate the source of the incident, refer to the appropriate Service Manual for further DTC P1491 diagnosis.

Jun 29, 2011 | Nissan Pathfinder Cars & Trucks

1 Answer

How replace intake gaskets focus 2000

SECTION 303-01B: Engine - 2.0L SPI 2000 Focus Workshop Manual IN-VEHICLE REPAIR Procedure revision date: 07/5/2001 Intake Manifold
Special Tool(s) 412108.jpg Remover/Installer, hose clamp
412-108 (T96P-18539-A) Removal
  1. Release the fuel pressure. For additional information, refer to Section 310-00.
  1. Disconnect the battery ground cable. For additional information, refer to Section 414-01.
  1. Raise and support the vehicle. For additional information, refer to Section 100-02.
  1. Detach the intake manifold bracket.
    • Loosen the nuts and remove the bolts.
  1. Lower the vehicle.
  1. Remove the air cleaner housing.
    1. Disconnect the mass air flow (MAF) sensor electrical connector.
    1. Disconnect the air cleaner outlet hose.
    • Remove the air cleaner housing from the rubber bushing.
  1. Disconnect the accelerator cable.
    1. Unhook the cable.
    1. Remove the plastic clip and position the accelerator cable to one side.
  1. Disconnect the speed control cable.
    1. Unhook the cable.
    1. Remove the plastic clip and position the speed control cable to one side.
  1. Disconnect the positive crankcase ventilation hoses.
  1. Disconnect the vacuum hoses.
    1. EVAP solenoid valve.
    1. Brake booster.
    1. Delta pressure feedback electronic (DPFE) system sensor.
    1. Exhaust gas recirculation (EGR) valve.
  1. Disconnect the EGR valve.
    • Discard the gasket.
  1. NOTE: Clamp the hoses to prevent coolant loss.
    Disconnect the coolant hoses from the intake manifold.
  1. Remove the vacuum hose assembly.
  1. Disconnect the throttle position (TP) sensor and the idle air control (IAC) valve.
  1. NOTE: Do not remove the oil level indicator tube.
    Remove the bolt and bracket from the oil level indicator tube.
  1. Remove the intake manifold upper support bracket.
  1. Disconnect the fuel injector electrical connectors.
  1. Disconnect the electrical connectors.
    1. Intake manifold runner control (IMRC).
    1. Camshaft position (CMP) sensor.
    1. Ignition Coil.
  1. Disconnect the fuel lines from the fuel rail. For additional information, refer to Section 310-00.
  1. Remove the intake manifold retainers and position the manifold to the rear of the engine compartment (shown with engine removed).
  1. Remove the IMRC manifolds (shown with engine removed).
    • Remove the two studs first.
    • Discard the gaskets.
  1. Remove the intake manifold from the engine compartment.

Mar 08, 2011 | 2000 Ford Focus

2 Answers

One of my gaskets is broken and I'm leaking oil its not the valve cover or head or oil pan which other gasket is there?

Well there is the intake. And if your running your car with a bad PCV valve you will have pressure building up and oil will spray making it look like its coming from somewhere else rather than the Valve covers. I would replace the PCV valve first and power wash the engine and replace the valve cover gaskets.
Please leave a good feedback on here for me.

Jan 07, 2011 | 1999 Dodge Caravan

1 Answer

Hi,i want to fit a dump valve on my t5 volvo where do i attatch the vacuum hose that comes of the valve?

It's a vacuum reference - the valve needs manifold pressure to keep the diaphragm closed when you're boosting, and that pressure opens the valve when you get off the gas. Use a T and tap into a vacuum line either from the manifold or from the wastegate reference line and it'll work.

Jan 07, 2010 | 1996 Volvo 850

1 Answer

1992 Ford F-350 5.8 l valve gasket

There should be some bolts surrounding the valve cover(s). Take them out take the valve cover off clean it up good put new gasket on put bolts back in tighten from center out so valve cover don't warp

Jul 29, 2017 | 1992 Ford F350

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