Question about 2003 Saab 9-3

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Loss of power

I have installed a cold air intake in my 2003 sabb 9-3. Its ran fine for a few days now it seems to have lost turbo power in gears 1,2,3 in 4th it seems to be fine. The turbo gauge only goes half way and the tach keeps going up fine.

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  • spiderddp Jan 03, 2009

    thank you. I forgot to tighten a clamp behind maf sensor. The car seemed to run fine for about 45 minuets then it started doing the same thing again.

  • spiderddp Jan 03, 2009

    yes I found a lose clamp but after about 45 minuets it started to do it again.



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You have a intake leak, look at everything you changed real good. You have a leak between the turbo and intake

Posted on Jan 03, 2009


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Hi. This will be a turbo issue. It is malfunctioning.

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Basically, your turbo is damaged. it will need to be replaced.

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Power loss and black smoke?

I had a similar issue to this after I got in a VERY small fender bender (literally) in an 87 Turbo Supra. In my case, my pasenger fender got pushed in JUST enough to crack a charge pipe and cause a boost leak.

Basically, what was happening was the turbo would spool and build boost, the mass fair flow sensor would read all this air coming in and tell the ECU to dial up the the appropriate amount of fuel. When the air reached the cracks in the charge pipe, it would escape out of them. Thus there was a much lower air-to-fuel ratio, causing less fuel to combust, which lead to power loss and black smoke out of the exhaust.

My guess is either an oxygen sensor, or more likely a boost leak.

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2 Answers

Loosing power/transmission

Could be an issue with losing boost from your turbo. Can you hear your turbo spinning correctly? I know some TDIs have turbos that are a little easier to hear than other for no apparent reason. Are all your vaccuum lines in good shape? Are the hoses from the turbo to and from the intercooler in good shape? Maybe when something (vacuum hose, intercooler hose) gets warm enough it flexes and leaks. Right when this happens you should pull over (if possible) open the hood and have someone give it a little fuel. You might be able to hear a vacuum leak or an air leak in the intercooler piping. It could also be a bum sensor that sticks at a certain value and when you stopped and restarted you unstuck it.
You need to start eliminating items or find any other symptoms you can to help narrow this down. It is a loss of power right, and that's what is keeping it in the lower gear? Or does it seem more like it is just stuck in lower gear?

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