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Discussion Starter · #1 ·
Been reading this forum for about a year now off and on but this is my first post. Lets see how well I have been paying attention, lol. Forgive me if this is not the correct place to post this.

Here is what my problem is:

2006 9-3 2.0T automatic w/ 118,000K.

I currently have an ABS/traction control/VSC fault (lights on, systems off)

I also am experiencing intermittent CEL activation stating "random multi-misfire detected". But it comes on randomly and goes off after a few ignition cycles (this has happened maybe 5 times in the past year).

The past few months I noticed I was making more and more frequent trips to the pump, so I checked it out and SID shows avg mpg at 18mpg which I thought was a little low. Cleared the display and filled up the tank to cross check the display with reality and fount the display to be within .3 mpg of my physical calculation, twice. I was at 12.5 mpg and 14 mpg.

I have installed NGK OE recommended plugs and a Wix air filter and no improvement.

As far as the ABS light goes, I had a general automotive repair shop look at it and they claim the ABS issue is a non-factor for fuel consumption which I do not know if that's true or not. They also said there was no resistance to the wheels that they could find (no brake sticking or anything). They also did a transmission fluid change and they talked me into using "wolfshead universal synthetic ATF" as they said it met the Saab specs.

Currently I am getting 12.5- 14 MPG depending on where I am going. I drive 8 mile to work and 8 miles home with 5.5 miles highway and the rest at 35mph. I have tried all grades of gas for two weeks at a time and no improvement.

The only other things I have to report is that the engine will sometime (3 times a week at the most) idle rough, really rough (I am worried it may stall sometimes, although it never has) at traffic lights or sometimes when I first start it up. I notice that it has happened when the engine is cold, and at normal operating temps. It has also done it with outside temps below freezing and at 80 degrees. I will say it seems to do it more within a day or two of getting gas but I wouldn't even say that is a constant.

Lastly, I have noticed that when I am merging onto the highway or in any situation when I am going roughly 50 mph and accelerate to beyond 60mph the engine "bogs" and I get little response unless I floor it and/or force the downshift manually.

I really love driving this car an do not want to sell it but I might as well be driving a Hummer at this point which is not why I bought a 4 cylinder turbo....

Any and all advice or suggestions are appreciated and thanks for all your help in advance.
 

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True that ABS fault will not have an effect on fuel consumption. But that misfire will for real. Gotta get that fixed up. Probably an ignition coil. Get a code reader and that will tell you which cylinder it is.
 

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Discussion Starter · #4 ·
True that ABS fault will not have an effect on fuel consumption. But that misfire will for real. Gotta get that fixed up. Probably an ignition coil. Get a code reader and that will tell you which cylinder it is.
Wow that was fast! I do have one, it will not narrow it down (unless mine is too cheap or something) just says "multi misfire". I talked to a former saab tech about that and he said not to worry about it until another code came on that narrowed it down. That never happened and at $100 a coil I would really like to narrow it down.
 

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You can get one and start at one end replacing one by one until you found the cylinder. Of course this is a shoot from the hip diagnosis, based on similar cases.
 

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I currently have an ABS/traction control/VSC fault (lights on, systems off)
Do me a favor. Go out on the highway and find a mile marker. Look at the odometer just as you hit it. Note your mileage. When you get to the next mile marker look down again. It sounds more like your misfires are your issue, but just to be sure you speed sensor isn't messed up.
 

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Discussion Starter · #7 · (Edited)
Do me a favor. Go out on the highway and find a mile marker. Look at the odometer just as you hit it. Note your mileage. When you get to the next mile marker look down again. It sounds more like your misfires are your issue, but just to be sure you speed sensor isn't messed up.
You are on to something. I did this on the way in to work today and sure enough, my 5.5 miles on the highway only registered as 2.8 miles on my trip odometer.

This would point to a wheel speed sensor (same as abs?) as being the culprit then, correct? Or would it be the vehicle speed sensor (powertrain)?Just as a side note, the speedometer is giving the correct reading (confirmed via my garmin).

Thanks very much for your suggestion.
 

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Discussion Starter · #9 ·
Yea I have been thinking about just doing that anyway to cancel it out as a possibility but I definitely will do the hub now. I have a genesis so I will plug in an see which one it is (hopefully it will be that easy). Thanks so much for your help. I will report back what I find out for sure to have for future reference.

Thanks again.
 

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You are on to something. I did this on the way in to work today and sure enough, my 5.5 miles on the highway only registered as 2.8 miles on my trip odometer.
Simple maths: if If 2.8 indicated miles = 5.5 real miles, correction factor is 1.964, multiply your indicated 13mpg with 1.964, = 25mpg.
:) You still have to check the misfire!
 

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Been reading this forum for about a year now off and on but this is my first post. Lets see how well I have been paying attention, lol. Forgive me if this is not the correct place to post this.

Here is what my problem is:

2006 9-3 2.0T automatic w/ 118,000K.

I currently have an ABS/traction control/VSC fault (lights on, systems off)

I also am experiencing intermittent CEL activation stating "random multi-misfire detected". But it comes on randomly and goes off after a few ignition cycles (this has happened maybe 5 times in the past year).

The past few months I noticed I was making more and more frequent trips to the pump, so I checked it out and SID shows avg mpg at 18mpg which I thought was a little low. Cleared the display and filled up the tank to cross check the display with reality and fount the display to be within .3 mpg of my physical calculation, twice. I was at 12.5 mpg and 14 mpg.

I have installed NGK OE recommended plugs and a Wix air filter and no improvement.

As far as the ABS light goes, I had a general automotive repair shop look at it and they claim the ABS issue is a non-factor for fuel consumption which I do not know if that's true or not. They also said there was no resistance to the wheels that they could find (no brake sticking or anything). They also did a transmission fluid change and they talked me into using "wolfshead universal synthetic ATF" as they said it met the Saab specs.

Currently I am getting 12.5- 14 MPG depending on where I am going. I drive 8 mile to work and 8 miles home with 5.5 miles highway and the rest at 35mph. I have tried all grades of gas for two weeks at a time and no improvement.

The only other things I have to report is that the engine will sometime (3 times a week at the most) idle rough, really rough (I am worried it may stall sometimes, although it never has) at traffic lights or sometimes when I first start it up. I notice that it has happened when the engine is cold, and at normal operating temps. It has also done it with outside temps below freezing and at 80 degrees. I will say it seems to do it more within a day or two of getting gas but I wouldn't even say that is a constant.

Lastly, I have noticed that when I am merging onto the highway or in any situation when I am going roughly 50 mph and accelerate to beyond 60mph the engine "bogs" and I get little response unless I floor it and/or force the downshift manually.

I really love driving this car an do not want to sell it but I might as well be driving a Hummer at this point which is not why I bought a 4 cylinder turbo....

Any and all advice or suggestions are appreciated and thanks for all your help in advance.




thank you for joining you have questioned a Saab engineer and now he will answer..


num 1
you went to a shyt shop who screwed you.. make sure your trans fluid was jws3309 spec or drain and refill.. drain plug is underneath i believe 15/16 box end wrench will do ya. refill green (12mm bolt) dip stick lower part of trans.. simple use long clear funnel any autoparts store.. valvoline synthetic spec at advanced trans fluid easy drain and refill twice.. yawns to easy.. dont over tighten ur drain plug please.. ok ty
(Just checked your wolfsleg fluid brah it does say its jws3309 spec so you should be good although i never used it.. you know what they are using and i wouldnt trust any shop to use synthetic they could tell you anything and use the cheap stuff. but thats up to you. all this matters if you want 450k out of your ride otherwise who cares right. Also forgot to tell you that some will not get your trans fluid at the right level.. ie your screwed brohams. these trans are the for the long haul ie. fluid should be checked while hot. operating temp. in park while running. Im sure they didnt to that. to be sure brohams i would if i was you, get the car up to oper temp.. on level surface, take ur trans didstick and check the fluid while in park. ) I bet its not where its supposed to be at..

num 2.
you have a bad coil or two.. simple.. replace them all or play pick and choose up to you. make sure you get the right coils. say saab or Mitsubishi on them usually around 100 bucks or more napa has them etc. as i said you can replace one or two or all up to you always good to replace all and have spares find the bad one first. thats your missing issue and miss fire.

num3.
if you still have the cut off or stutter issue. it could your fuel pressure regulator which is on your fuel rail right side looking at the injectors. take the black plastic engine cover off first of course. i hope you are familiar with cars but yeah.. it unscrews its a spring loaded deal easy to replace. OR it could be your fuel pump and lack of flow. make sure you do the coils first as these fuel issues are related to high mileage kings such as myself.

num 4. your abs/ traction/ stability.
can and should be related to your abs module. of course pain in the *** to change but do go bad, ive had two go bad. under hood, look at it right side rear has all your brake lines going into it.. that is your abs pump and on it is your abs control module. this fails and will cause all those lights to come on but not the cel. thats ur missfire coils.
you cant replace the module on it so its easier to replace the whole pump and module and then you will have to bleed your brakes and refill dot 4..
get them all day on ebay brohams and other questions just ask your fellow saab engineer.

if you have the cash as always i recommend you take it to your nearest saab specific shop if you are not familiar get them to diagnose. Please do not take it to hole in the wall shop or you will be wasting cash as you just did with this shop. as with all online advice these are best estimates based on description brohams... and are 95% accurate without seeing the car. ;ol;

please ask if you need more help
 

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hi my 2005 saab 9-3 done extact same thing puts on abs warning, traction control and stability lights - found a broken wire on rear wheel leading to abs sensor
 

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If I stay local, I also get 12-14 MPG, but on the highway I can get mid 25 MPG. At least on my car and driving, I think it's normal. In the early ears, the engine and transmission seemed tune for response rather to conserve anything in city driving.

I realize you have other concerns though so yours is not the same. City MPG is awful on this car though.
 

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If I stay local, I also get 12-14 MPG, but on the highway I can get mid 25 MPG. At least on my car and driving, I think it's normal. In the early ears, the engine and transmission seemed tune for response rather to conserve anything in city driving.

I realize you have other concerns though so yours is not the same. City MPG is awful on this car though.
You have a V6 though...wee bit of difference.
 

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hi my 2005 saab 9-3 done extact same thing puts on abs warning, traction control and stability lights - found a broken wire on rear wheel leading to abs sensor
Yes always check your hub wires first. they shouldn't break but if you have a weasel doing your brakes they could break them.

those three codes are tied together with your wheel speed so your hub sensor is one of the major components in your abs/ stability/ and tract/.
 

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Just to add a couple of things. Get some mass airflow cleaner and clean both the MAF and the MAP sensors. Also a faulty MAF will give poor mpg and sometimes cause stuttering. But you must get the coils checked/changed first.
 

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diggs

diggs your a genius dude haha
and hey thought doc theres good information I posted on the front hubs on this thread
http://www.saabcentral.com/forums/showthread.php?t=423170

there might be better research out there for hubs but usualy the front ones go first and the front right hub speed is most likely to go

you can narrow it down if you actualy go pin to pin on each hub looking for the odd ball also

think of this?

DONT FIX IT YOU HAVE LESS MILES ON THE CAR IN THE END HAHA=)
but yeah you might want esp/tcs/and abs
 

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Discussion Starter · #19 ·
I have purchased coils and a moog hub. I am going to start there. I also found a saab specialist in my area that I can take it to if this doesn't work. Thanks all for your help. I will report back with what I find out.
 
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