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Need Vacum Hose Diagram for Manual Boost Control for Twin Turbo

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  • jofo134 Oct 05, 2009

    Thank You I will effect in a while and let you know

    Thank You very much

    Joe

  • jofo134 Oct 05, 2009

    Yes

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  • Master
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The image below buddy get back to me if its wrong i have more im not sure if you can see it
Need Vacum Hose Diagram for - b62c388.gifmoz-screenshot.png

Posted on Oct 05, 2009

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Posted on Jan 02, 2017

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Subaru legacy boost


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On my 2000 Golf 1.9 tdi ALL vacuum hoses are disconnected. How do i connect the hoses between the turo boost control valve and the egr solenoid valve as well as the main vacuum hose from the vacuum pump. I...


You will need a Vacuum hose diagram to hook thes up correctly. There should be a diagram on the hood or raiator cover of the vehicle. If the diagram is missing you will have to take ALL info from your car (Year,Make, Model, Engine size, Engine code) and obtain the diagram from a dealer.

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Torque settings for turbo 2002 bora


all turbo have diafram and rad for adjusting air goes to engine this diafram control by vacum solenoid valve .accilerat up to 3000 RPM check rad if move .if not check vacum hose if no vacum check valve if ok .if the vacum ok check rad you can move in and out if no open turbo side and clean the valve . but you can't increase the power if you have problem with lack of power check air mass first

Jun 20, 2011 | Volkswagen Passat Cars & Trucks

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Turbo refuses to supply power when accelerating. Manual gear changing necessary to attain top (6th) gear.


The car goes in "limp home" mode:
After scanning the Engine Control Module (ECM) with a VAG or similar diagnostic tool you will find this: Fault code: P1557-Turbo Boost pressure control exceeded
1. Engine stopped and ignition switch off. Check all pneumatic connections and hoses between turbocharger actuator = pressure unit for boost-pressure control, boost-pressure control solenoid valve, vacuum reservoir, EGR control solenoid valve, intake-manifold flap solenoid valve, EGR valve with throttle - part of intake manifold. Also the vacuum connection between tandem pump and brake booster. If you find something wrong replace parts. If not go to step 2.
2. Extract the hose of the turbocharger actuator = pressure unit for boost-pressure control part of turbocharger. Instead of the original hose you must place another 1 meter long hose with the same inside diameter, and then you check to inspire yourself the air from the other one extremity of this hose. The mechanical connecting rod of the turbocharger actuator must have a smooth and whole motion. If you can do that with your mouth, then you must replace the boost-pressure control solenoid valve. If you can not reach this with your mouth, then you go to step 3.
3. This is the most difficult work. The problem is that the soot particles deposits inside the turbocharger plugging the variable nozzle geometry mechanism = adjustable vanes of the turbine. If the turbocharger actuator is not able to adjust the turbine vanes the charge air pressure increase too much and ECU (engine control unit) go in "limp mode" = engine protection software. As a result the "limp home" mode engine still running until you turn the engine off (ignition switch off) and back on when the "limp mode" is deactivated, but the fault still remain in ECU memory!
4. You must be able to extract the turbo from the engine and then to disassemble the turbocharger, clean inside adjustable vanes mechanism and refit all.

May 24, 2011 | Volkswagen Passat Cars & Trucks

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I need the diagram/schematic of the vacuum tube layout of 2.0L DOHC


Hello redeemer524,

Below is the diagram. I hope this helps.

netvan_94.png

Regards,
netvan

Apr 14, 2011 | 1999 Mitsubishi Eclipse

1 Answer

Hi i have an audi a6 1.9tdi with the awx engine in it it keeps going into limp mode there is no air leaks ive read the codes and it say says turbo over boost? new egr, you can see the actuvator arm move...


In your case the turbocharger is responsible for engine losing power.
The car goes in "limp home" mode!!!
After scan the EDC-15P engine control unit with a VAG or KTS -BOSCH diagnosis tool you will find this: Fault code: P1557-Turbo Boost pressure control exceeded
1. Engine stopped and ignition switch off. Check all pneumatic connections and hoses between turbocharger actuator = pressure unit for boost-pressure control, boost-pressure control solenoid valve, vacuum reservoir, EGR control solenoid valve, intake-manifold flap solenoid valve, EGR valve with throttle - part of intake manifold. Also the vacuum connection between tandem pump and brake booster. If you find something wrong replace parts. If not go to step 2.
2. Extract the hose of the turbocharger actuator = pressure unit for boost-pressure control part of turbocharger. Instead of the original hose you must place another 1 meter long hose with the same inside diameter, and then you check to inspire yourself the air from the other one extremity of this hose. The mechanical connecting rod of the turbocharger actuator must have a smooth and whole motion. If you can do that with your mouth, then you must replace the boost-pressure control solenoid valve. If you can not reach this with your mouth, then you go to step 3.
3. This is the most difficult work. The problem is that the soot particles deposits inside the turbocharger plugging the variable nozzle geometry mechanism = adjustable vanes of the turbine. If the turbocharger actuator is not able to adjust the turbine vanes the charge air pressure increase too much and ECU (engine control unit) go in "limp mode" = engine protection software. As a result the "limp home" mode engine still running until you turn the engine off (ignition switch off) and back on when the "limp mode" is deactivated, but the fault still remain in ECU memory!
4. You must be able to extract the turbo from the engine and then to disassemble the turbocharger, clean inside adjustable vanes mechanism and refit all.

Jan 14, 2011 | Audi A6 Cars & Trucks

2 Answers

Turbo/supercharger under boost


Turbocharger under boost problem:
The car goes in "limp mode"!!!
After scan the EDC-15P engine control unit with a VAG or KTS -BOSCH diagnosis tool you will find this DTC - Fault code: P1557-Turbo Boost pressure control exceeded
1. Engine stopped and ignition switch off. Check all pneumatic connections and hoses between turbocharger actuator = pressure unit for boost-pressure control, boost-pressure control solenoid valve, vacuum reservoir, EGR control solenoid valve, intake-manifold flap solenoid valve, EGR valve with throttle - part of intake manifold. Also the vacuum connection between tandem pump and brake booster. If you find something wrong replace parts. If not go to step 2.
2. Extract the hose of the turbocharger actuator = pressure unit for boost-pressure control part of turbocharger. Instead of the original hose you must place another 1 meter long hose with the same inside diameter, and then you check to inspire yourself the air from the other one extremity of this hose. The mechanical connecting rod of the turbocharger actuator must have a smooth and whole motion. If you can do that with your mouth, then you must replace the boost-pressure control solenoid valve. If you can not reach this with your mouth, then you go to step 3.
3. This is the most difficult work. The problem is that the soot particles deposits inside the turbocharger plugging the variable nozzle geometry mechanism = adjustable vanes of the turbine. If the turbocharger actuator is not able to adjust the turbine vanes the charge air pressure increase too much and ECU (engine control unit) go in "limp mode" = engine protection software. As a result the "limp mode" engine still running until you turn the engine off (ignition switch off) and back on when the "limp mode" is deactivated, but the fault still remain in ECU memory!
4. You must be able to extract the turbo from the engine and then to disassemble the turbocharger, clean inside adjustable vanes mechanism and refit all.

Aug 19, 2010 | Audi A4 Cars & Trucks

1 Answer

97 legacy no boost


The second turbo simply follows the first when the system activates it by bringing it in parallel with the first. The first turbo is only designed for a 1200cc motor so it can not deliver enough compressed air at revs for a bigger motor so they arrange to bring in a second turbo of the same size when the first one runs out of puff.
The first turbo is a semi-mechanical device. The ecm raises the boost level at which it operates but it should be producing some boost regardless.
So concentrate on the first turbo.
Isolate it from the ecm control system
(There is a misleading tip on youtube involving pulling hoses but it is misguided, the comment is ignorant, and I do not recommend it)
Instead, as per the manual, on the first turbo remove the system pressure lines from exhaust and wastegate. Loop a short piece of vacuum hose from the primary turbo output to its own wastegate.
Blank off the system hoses you disconnected. Fit a boost gauge, drive it and observe the boost gauge readings (manifold pressure). If the primary turbo is OK this will make it operate at a lower boost level (5-7psi ?) than the system control (10-17psi) but it will be a purely mechanical operation which will isolate where the fault is.
If there is no boost and the pressure stays zero down then the turbo is not working. Check for the wastegate being stuck or maladjusted. If that is working then you bave a faulty turbo for whatever reason. Maybe there is a loose bolt stuck in it from the engine rebuild?

If the turbo is working OK then it points to an electrical issue with the the boost control solenoid which is inside the wing near the vacuum tank beside the battery compartment. The control voltage from the ecm usually pulses it on/off at a fast rate to give a measured control and it may be stuck. Maybe it is the ecm or maybe the valve. But before you go dig it out, first check the pressure lines such as 10 and 23 are connected or not reversed at their connectors where they go through the wing (just behind the battery)
Good luck

Jan 30, 2010 | 1996 Subaru Legacy

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Jun 29, 2009 | 1999 Subaru Legacy

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