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Discussion Starter #1
I may be imagining it but I don't think I am, just not sure how to test thing without going to a garage/specialist.

Essentially the car just feels like it's lacking boost. The boost gauge goes up to the red line and I have no warning lights, and I can't hear any hissing from boost leak. When the boost engages it feels weak and the engine revs a little harder than it used too and I cant hear it drawing in as much air as it used too.

I was worried it was clutch slip, I've tried to pull away in 3rd and the revs don't go up like the clutch is gone.

Anyone got any bright ideas what I can do to test or work out where the power is going?
 

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Open the window, and u would feel its going fast again 馃槀馃槀馃槀

apart from that, i dont think there is any issue, unless it happened just recently so u may wana wait for a MIL
 

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Discussion Starter #4
Try disconnecting and reconnecting the battery terminals to reset the ecu.
OK I will try this.

What's an MIL?
Just feels so weird. I can hear the turbo suck a little but the car just sounds like a 2l being ragged. I. Don't get pushed into the back of my chair anymore.
 

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Discussion Starter #6
Definitely a boost leak problem or turbo problem. Slight pull in 2nd gear but nothing in 3rd or 4th.
Car is down in power significantly. The turbo gauge is going up and down fine and I have no warning lights.
I now have to decide if I take it to a garage or make a DIY pressure tester.
 

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Discussion Starter #8
No the only thing I have is a odb2 tester. I could phone around garages to see if they have one.
 

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Discussion Starter #10
It's a Bluetooth one so I can download any app. I have one called car tester that can do live data to an extent before you have to buy the Pro version.
What should I be looking for?
 

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Two tests
1. pull
a. long term fuel trim
b. Short term fuel trim
drive at third gear 2000-2500 RPM preferably with cruise control ON on a level street, provide the average of both reading (preferably in a graph mode)

2. Pull MAF in g/s (again preferably in graph mode) execute a full throttle acceleration on 3rd gear from 2000Rpm all the way to 6000 (dont lift ur foot all the way up)

provide both graphs.
 

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Discussion Starter #13
Just an update to this and I am wondering if anyone can chime in.
Had the car looked at by a mechanic who is a mate. Did a few hours on other stuff and I asked about the power loss.

Didn't find much wrong, as it still feels quick to him he wasn't sure if there was a problem but we did some readings anyway.

We did a boost leak smoke check. No leaks, and did some runs with a tech2 thing.

Only 2 issues he could see (appreciating he's not a saab specialist) was that the atmospheric / barometric pressure sensor (not the manifold absolute pressure, right?) was not working and was reading 0.38bar. It didn't move and we could find no such sensor on any manual anyway, so maybe a red herring as part of his software.

Secondly the maf readings only ever got to 150g/s at full throttle, he felt sure this should be higher for a car with this bhp. Anyone confirm.

So without further test or replacing parts here and there, I'm not sure what to do.
Maybe a replacement maf as a test, but sourcing on seems to show them to be a bit on the pricy side, if it isn't that.
 

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No atmospheric sensor from i think 2005 and up cars, software will show a fixed value, so thats normal
yor max MAF at 3rd gear, full throttle acceleration, as you just pass the 5500rpm mark should read around 75% of ur bhp, so if u have the 210hp engine, should be around 160g/s , provided the test procedure applied as above.
how the boost leak test was performed exactly ?
 

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Discussion Starter #15 (Edited)
With a pressurised smoke tank thing hanging from bonnet that was pushed into the intake before the turbo.
Oil cap off etc.

We also noticed that like a idiot I had my odb2 sensor in constantly from messing about with 0-60 times.
He mentioned in a fly by comment that he's known that to effect ecus on other vehicles.
 

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Discussion Starter #18
Yes I'd be interested to know incase there are issues with my boost pressure that the smoke didn't show.
 

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Its actually very weird that the smoke didnt show while using that method .
Here is a video of how to do it, notice how u r supposed to disconnect the rear pcv hose and block it ..
 

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Its actually very weird that the smoke didnt show while using that method .
Here is a video of how to do it, notice how u r supposed to disconnect the rear pcv hose and block it ..
I know that video, I thought you were talking about others ways to perform a smoke test. OK
 
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