Question about 2004 Saab 9-3

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Saab 9-3 turbo problem!

Problem: Giving full power (hot engine, after driving several miles) the turbo gives full power and then, like the pressure is too high, reduces pressure. It feels like you are pumping the gas pedal all the time - power - no - power - no power - no. This effect can also be seen on the turbo pressure panel. If you keep standing on the gas, this symptom keeps for a while and then suddenly the car works like normal!? The test system cannot find any fault! Does anyone have a clue, where this fault comes from, and how it could be solved? I have the same problem exactly, and I'm suffering to solve it, can you please confirm if you have already solved it?  if so please explain the solution in details.

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  • 124 Answers

Check the turbo waste gate lever.
Remove the rod from lever, check lever moves freely .

Posted on Aug 02, 2008

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j_del
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SOURCE: Saab 9-3 turbo problem!

Sounds like the recirculation valve (aka diverter valve) is failing. A lot of turbo cars that have them end up with failures from them, since they're usually cheaply made from plastic, and the diaphragms inside don't hold up over time.

What the valve does is, when you shift, there is a backsurge of boost air that hits the closed throttle plate. The diverter valve (DV) opens and dumps the air back into the intake piping. It's kept closed during acceleration by spring and manifold pressure. When you shift, the pressure drops on the backside of the valve and it opens, venting the excess boost air. If your valve is failing, just the pressure of boost in the intake piping could be pushing it open, causing the acceleration to slow. I'd look into a replacement diverter/recirculation valve.

Posted on Jul 31, 2008

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My saab 9-3 aero coupe 2001 has misfiring problem when going to accelerate the speed of the car. also turbo doesn't give the power it should.help



Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Aug 07, 2012 | Saab 9 3 Cars & Trucks

1 Answer

SAAB 9-5 LINEAR TID DIESEL SALOON 3.0 DIESEL THE FOLLOWING DEFECT: THE CAR STARTS, RUNS AND DRIVES SWEETLY,THE TEMPERATURE GAUGE NEVER GOES ABOVE THE HALFWAY MARK AND THE HEATER BLOWS CONSTANT HOT AIR....


I had the same problem on my 9-5 vector 3.0 TiD with the top up coolant warning. Nearly became bankrupt trying to diagnose the problem and trips to Saab. Header tank, sensors, pressure tested etc. The Saab squaddies couldn't figure it out until it got worse. It's a head gasket failure despite passing pressure tests initially...sounds like it's still early days on yours. Had to replace the engine for near £5000.but under warranty :-) Reckon 2.5-3k at a good specialists.

Feb 01, 2011 | 2000 Saab 9-3 Viggen

3 Answers

Is the turbocharger expensive to replace? Can the car run if the turbo is not working?


Yes, replacement can be pricey. The engine is de tuned to allow for the pressure of the turbo, so without one you will not have much performance.

Sep 06, 2010 | 1999 Saab 9-5

2 Answers

Can i you drive without turbo on saab 9-5 2000


No. Turbo charged engines have been designed to have the turbo. The turbo uses exhaust gas to spin a dual air compressor to push additional air into the intake, without it the car probably won't even run. There are numerous electronics monitoring pressures and temperatures. Sorry turbo has to be fixed for car to run properly.

Apr 01, 2010 | 1999 Saab 9-5

1 Answer

1999 saab 9-5


Depending on the overall condition of the engine, it could have worn or frozen rings, worn valve guides or the turbo you installed is worn out. These are driven by exhaust pressure and if their bearings are worn, you may be getting a mix of compressed air from the turbo and oil that is seeping past the compressor's internal seals.

Sep 06, 2009 | 1999 Saab 9-5

1 Answer

99 Saab 9-5 going on its third turbo in 3 months?


turbo oil return line could be stopped up causing pressure to build up blow the seal in it.

Apr 24, 2009 | 1999 Saab 9-5

2 Answers

Engine check lite saab 93 2.0l non turbo yr 2000


You will need to change the o2 sensors, your car is running in limp mode (giving to much gas)
Most common problem if you need additional help
hope this helps

Dec 29, 2008 | 2000 Saab 9-3 Viggen

2 Answers

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Sep 01, 2008 | 1991 Saab 9000

2 Answers

Saab 9-3 turbo problem!


Sounds like the recirculation valve (aka diverter valve) is failing. A lot of turbo cars that have them end up with failures from them, since they're usually cheaply made from plastic, and the diaphragms inside don't hold up over time.

What the valve does is, when you shift, there is a backsurge of boost air that hits the closed throttle plate. The diverter valve (DV) opens and dumps the air back into the intake piping. It's kept closed during acceleration by spring and manifold pressure. When you shift, the pressure drops on the backside of the valve and it opens, venting the excess boost air. If your valve is failing, just the pressure of boost in the intake piping could be pushing it open, causing the acceleration to slow. I'd look into a replacement diverter/recirculation valve.

Jul 31, 2008 | 1995 Saab 900

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