Question about 1995 Saab 900

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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. i have the 95` 900s and have the exact problem and noone knows why, only difference is mine has no turbo.

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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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I have a 1995 saab 9-3 2.5, my check gear box light comes on when when i accelerate , my heater cuts off , it will drive fine, then when the check gear box light comes on it start driving sluggish. Anyone knows about the winter mode on these cars

Posted on Jan 16, 2009


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Posted on Jan 02, 2017

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SOURCE: Saab 9-3 turbo problem!

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

Posted on Aug 02, 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

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

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2000 9-5 wagon 2.3L turbo. trouble light comes on and engine temp gauge goes high after about 5 miles of driving (winter with heat on). coolant level full; overflow tank backing up. could it be stuck...

For the amount of money it will cost it would be worth changing the thermostat anyway. They aren't very expensive and reasonably easy to repair.
Water pump replacements are more expensive AND more work. Try the cheaper one first as thermostats are known to wear out.
If the overflow tank is backing up it will be because the safety valve built into the water pump is diverting built up pressure.

Feb 11, 2018 | 1999 Saab 9-5

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

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Engine check lite saab 93 2.0l non turbo yr 2000

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hope this helps

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Sep 01, 2008 | 1991 Saab 9000

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Saab 9-3 turbo problem!

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

Jul 24, 2008 | 2004 Saab 9-3

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