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  #1  
Old 19th April 2011
bequino bequino is offline
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Default Evaporative Emission Control System leak- gross leak detected - Any ideas?

My check engine light came on about a month ago. I went to autozone and pulled the CEL code. It first came back as a "P0442 Evaporative Emission Control System leak Detected (small leak)". Usually that is a bad gas cap. I replaced the cap, then cleared the codes. The CEL came back, this time as a "gross leak detected". I have pulled and lubricated the 'purge valve", and it seems to be functioning and "ticking" properly. All vacuum tubes are in place and seem to be in good shape. The car runs perfectly, and idles even better. Any ideas, before I take it to an official SAAB tech, and pay out the rear end? BTW I have a 1997 Saab 900SE Turbo 106k mi. Thank you!
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  #2  
Old 19th April 2011
hkayssi hkayssi is offline
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Check the vacuum hoses going to the Evap valve one is probably split or broken
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  #3  
Old 19th April 2011
Cm452 Cm452 is offline
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You've got is backwards; a small leak is generally a vacuum line or cracked hose, a big'un is from a faulty gas cap or an 'effed charcoal canister.
The charcoal canister is near the gas tank, its a black box about the size of a "munchkins" box from dunkin donuts. Make sure the hoses are connected and integral to that and make sure you have an EXACT oem gas cap.
Best of luck,
-Cm
P.s I struggled with issues like this foooooooooooooooooooorever. I had a bad tune on my ECU FWIW.
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Old 20th April 2011
bequino bequino is offline
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Thanks for the info guys. I replaced the gas cap with an autozone equivalent part, maybe ill look into getting an actual Saab OEM gas cap. I will also check the charcoal canister and vacuum lines this weekend. It may be appropriate if I just swap all the visible vacuum lines out, seeing as tubing is pretty inexpensive. Someone also suggested the fuel filler neck... Looks like I have some more investigating to do!

BGE
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  #5  
Old 20th April 2011
hkayssi hkayssi is offline
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Quote:
Originally Posted by bequino View Post
Thanks for the info guys. I replaced the gas cap with an autozone equivalent part, maybe ill look into getting an actual Saab OEM gas cap. I will also check the charcoal canister and vacuum lines this weekend. It may be appropriate if I just swap all the visible vacuum lines out, seeing as tubing is pretty inexpensive. Someone also suggested the fuel filler neck... Looks like I have some more investigating to do!

BGE
That usually causes some bucking and an inaccurate fuel level reading. You may also have a deformed gas tank in that case.
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Old 28th December 2011
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SpongeBob SpongeBob is offline
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Default Same problem

Quote:
Originally Posted by hkayssi View Post
Check the vacuum hoses going to the Evap valve one is probably split or broken
Can you please tell me where the EVAP VALVE is located. Also the charcoal cannister - I read thats near the gas tank but where?
I suspect that my problem may be at the cannister or filler neck because the fault shows up usually when I go through a car wash - so perhaps the force of the water on the underside may be moving something.
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  #7  
Old 28th December 2011
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earthworm earthworm is offline
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Quote:
Originally Posted by SpongeBob View Post
Can you please tell me where the EVAP VALVE is located. Also the charcoal cannister - I read thats near the gas tank but where?
I suspect that my problem may be at the cannister or filler neck because the fault shows up usually when I go through a car wash - so perhaps the force of the water on the underside may be moving something. Possible, check the tanks security and vent system...
As I recall, its above the master cylinder area.
http://www.saabcentral.com/forums/sh...d.php?t=204594
Money was wasted on the fuel caps, unfortuniately..There should be a way of testing a cap. Maybe a little blue or white chalk on the sealing surface ???
I suspect a malfunctioning purge valve..And the things controlling it could be suspect...
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Old 28th December 2011
busaboy busaboy is offline
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Quote:
Originally Posted by SpongeBob View Post
Can you please tell me where the EVAP VALVE is located. Also the charcoal cannister - I read thats near the gas tank but where?
I suspect that my problem may be at the cannister or filler neck because the fault shows up usually when I go through a car wash - so perhaps the force of the water on the underside may be moving something.
EVAP purge valve is right next to the right shock tower, just behind the airbox.
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  #9  
Old 28th December 2011
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SpongeBob SpongeBob is offline
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Quote:
Originally Posted by busaboy View Post
EVAP purge valve is right next to the right shock tower, just behind the airbox.
Thanks...
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  #10  
Old 28th December 2011
tax tax is offline
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My charcoal canister is in the right front wheel well - I also have a 97 900 SE turbo
Good luck - I'm still trying to figure mine out - without taking it to a shop to blow smoke
up a tube.
Tax
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  #11  
Old 29th December 2011
hkayssi hkayssi is offline
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Quote:
Originally Posted by SpongeBob View Post
Can you please tell me where the EVAP VALVE is located. Also the charcoal cannister - I read thats near the gas tank but where?
I suspect that my problem may be at the cannister or filler neck because the fault shows up usually when I go through a car wash - so perhaps the force of the water on the underside may be moving something.
Charcoal canister is under the passenger side fender behind the plastic skirt behind the wheel well. The Evap valve is located on the firewall. Just follow the medium sized hose behind the throttle body to find it; it's mounted to the passenger side shock tower.

Make sure you perfor the ralls on the fuel system
http://www.automallusa.net/2001/saab/9-3/recalls.html
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