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Old 01-04-2015, 04:12 PM   #1
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Exclamation 2004 9-5 Arc CEL? (code inside)

Hello all,

I bought an 04' 9-5 Arc 2.3t ECOpower and I had it for about 2 weeks, CEL just came on a week ago and I've retrieved the error code P1181: Long term lean running condition? Interesting because it passed emissions faster and better than any car I've ever owned, it has 103k on it and runs excellent (even with the code) I've filled it up for the first time with 91 ethanol free fuel, best we have, we don't have 93 available here anywhere, hoping that this will do the trick. If it doesn't can anyone please recommend other things to check? I'd really appreciate it as I do love the car and don't or better yet can't afford an expensive repair..

Thanks a lot in advance!!

-Steve
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Old 01-05-2015, 06:55 AM   #2
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LTFT lean is usually an exhaust leak between the head/turbo.
A leak will pull in clean air, which throws-off the o2 sensors.
Look for carbon around where the exhaust manifold joins to the head.
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Old 01-05-2015, 10:16 AM   #3
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Thanks Craig, will do. If I find some I suppose just replacing the manifold to head gasket would take care of it? Is there a way to check for a leak even if I don't see any carbon build-up?

This is also some stuff I posted in my intro thread that I'm going to do:

I plan to remove and clean the MAF, as well as change the plugs, I'd also like to check the air filter, with all the intake plumbing installed I can't even see the filter box, how far below the headlight is that thing? Anything else I should do when I've got all of that out? Is there a section here that has some detailed photos of this engine bay? I also noticed a split vacuum line that's right under the cast portion of the turbo inlet pipe, trying to figure out what it is?

Thanks again Craig! BTW really like your car.

-Steve
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Old 01-05-2015, 12:38 PM   #4
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It would. Just make sure you have the hardware kit, too. Those studs get brittle. you'll want to replace them all as you go.
You could use a piece of tissue around the ports. see if gets blown around... but it's VERY hot in there, and a tight space.
You could run some seafoam through the intake and have someone cover the exhaust pipe; you'll see the smoke pour out from any leaks.

As for the airbox, It's under there in the passenger corner. you'll see it, there's no doubt about that. you'll just need to take the splash-guard down. A lot of people (including myself) replace the entire airbox with a "filter on a stick" for some performace gains. You'll just need to be aware that your intake is open before you go plowing through puddles.

...and thanks for the compliment!
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Old 01-07-2015, 04:24 PM   #5
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Thanks for the info Craig, I've got the MAS cleaner which I'm going to try, I changed the plugs, filter still needs to be addressed but I'll get to it. I'm also in the process of checking for your fore-mentioned leak check between the ex. mani and turbo. In the mean time could you tell me what the little white check valve is right behind the intake mani that has a short hose running into the Throttle body? It's busted and leaking air, and I can find a replacement.

Also, I have a broken/leaking vacuum line that seems to come from the BOV, the one just under the cast turbo inlet pipe that's maybe 6" in length?

Thanks again and any other info is much appreciated!!

-Steve
Attached Images
File Type: jpg bay.jpg (136.2 KB, 7 views)
File Type: jpg valve.jpg (109.6 KB, 6 views)
File Type: jpg cracked line.jpg (144.5 KB, 7 views)
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Old 01-09-2015, 04:29 PM   #6
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That broken hose on the intake is a sure reason for a lean condition.

Is there nothing connected, or is it just broken? the hose that should go there should come from the wastegate solenoid, I think. It's been a while since I've messed with mine. Let me look it up....

The BOV should go to a solenoid on the firewall, and then to the "tree" off the intake manifold. (you can run a new line directly from the BOV to the tree if you'd like. the other line from the tree should go to the FPR. if you haven't, just replace the lines with silicone.
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Old 01-12-2015, 07:33 AM   #7
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Craig, that intake hose thing is just a plug. Some cars had something going there (autos?) some didnt.
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