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Old 01-21-2011, 10:31 AM   #301
Izero
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well just got a call from my shop yesterday, you guys wont believe what it is...

The gasket on one of the TGV's blew out completely... don't ask me how a new gasket blew out... it just did, so $280 and I'll have my car back this afternoon. I probably could have fixed it myself but I am in my final semester of college... so not exactly as much free-time as I'd like... lol

So to those of you who have tried everything else check your TGVs!!!
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Old 01-21-2011, 01:46 PM   #302
txl146
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Izero, did you have any idle problem?
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Old 01-21-2011, 03:10 PM   #303
Vlad
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gasket above or below TGV?
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Old 01-21-2011, 03:17 PM   #304
txl146
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I had gasket below replaced, but thought gasket above rarely fails.
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Old 01-21-2011, 06:29 PM   #305
Vlad
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Yeh, I replaced below, kept the above as well.
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Old 01-24-2011, 10:55 AM   #306
Izero
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I believe it was below... but I am not 100% sure... All I know is I replaced both and called it a day... just needed the car back on the road....

It's all good now.... cept my A/Fs at crusing are a little funny, prolly b/c we rescaled the MAF and cleaned it while it was having this problem... time to re-tune now... :-/
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Old 02-01-2011, 12:16 PM   #307
StreetKa
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I was looking at the 04 wrx wagon for sale yesterday with 180k miles on it it had p0171 code as owner claimed it was due to fuel pump not pumping enough fuel which i think is bs. Car is mostly stock has stock turbo catback bov and it was rebuilt with manley pistons. He is running 16 psi and car felt pretty weak comparing to my friend's wrx. Guy doesnt seem to be too bright what he is doing my question is: isnt it not safe to drive a car like this ? If the afr is messed up ? He doesnt have afr gauge but thats what i think it is? Thanks.

Jake
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Old 02-01-2011, 01:29 PM   #308
05Scooby
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Quote:
Originally Posted by UURRXX_Ash View Post
wow... great post you guys... I had the code a little before I was going to put my car back to stock from stage 4 for the ref. I figured it probly wouldn't come back and 42 miles later normal cruising and the sucker popped up. Car runs fine. Slow by comparison of coarse

I will go down the list and post results. sounds like vacume lines and injector cleaner is a solid fist step. Thank you very much for all this info... There's so many possibilities I had no idea where to start.

Ash


Start with the easy stuff first.
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Old 02-01-2011, 02:12 PM   #309
Darryl
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Default that's an odd code to nail down

StreetKa
I would not be too interested in buying that car from what you say about it. I think you are rightfully hesitant: "mostly stock, rebuilt with Manely pistons". But that's just me.
As for the p0171, it's an odd one to track down. I had my front O2 sensor replaced and that didn't fix it. I cleaned the MAF and that didn't fix it. I checked for bad vacuum hoses, and found none. So I spent $50.00 and bought a cheap OBDII reader and just started clearing the code. Odd thing is the code would stay off for weeks then pop up again. I'd clear it, and wait for the next one to light off. Then it got to where I'd have to reset it like once a week. But now it's been six months since I've seen it. Go figure. It never did effect the drive-ability of the car; no change in startup, idling, power or fuel economy. Stranger than fiction.
darryl
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Old 02-01-2011, 04:48 PM   #310
StreetKa
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Quote:
Originally Posted by Darryl
StreetKa
I would not be too interested in buying that car from what you say about it. I think you are rightfully hesitant: "mostly stock, rebuilt with Manely pistons". But that's just me.
As for the p0171, it's an odd one to track down. I had my front O2 sensor replaced and that didn't fix it. I cleaned the MAF and that didn't fix it. I checked for bad vacuum hoses, and found none. So I spent $50.00 and bought a cheap OBDII reader and just started clearing the code. Odd thing is the code would stay off for weeks then pop up again. I'd clear it, and wait for the next one to light off. Then it got to where I'd have to reset it like once a week. But now it's been six months since I've seen it. Go figure. It never did effect the drive-ability of the car; no change in startup, idling, power or fuel economy. Stranger than fiction.
darryl
Yeah but for the record car felt weak. If that doesnt do anything to performance then its something else that makes a car run weird. So u can run like that without worries if happen? Right ? Just get o2 wideband and control afr to be sure i think will be best way to have piece of mind. Thanks anyway im not gonna buy it. I'd rather save up and buy newer 06-07 wrx wagon stock.
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Old 02-01-2011, 07:12 PM   #311
Darryl
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Default good call, StreetKa

Buy yourself some peace of mind (in a better Subie). Yes, no issues with my car because of that code. I always wanted to be sure I knew the CE light was not a (more) serious code. That's why I bought the reader. My old Bug-eye still runs like a young pup.
Good luck with whichever car you get.
darryl
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Old 02-20-2011, 03:47 PM   #312
txl146
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Quote:
Originally Posted by txl146 View Post
Here is what I did to remove P0171 code and pass state inspection.

1. MAF sensor cleaned
2. IACV completely disassembled then cleaned.
3. PCV replaced
4. TMIC and all hoses disassembled and checked for leak and condition.
5. Map pressure sensor removed and cleaned. Found out that one of the bolt came off loose!
6. Intake filter removed and put back (checked for proper seal).
7. Fuel filter and hoses replaced
8. O2 sensor ordered, but NOT replaced yet...

Car finally passed state inspection today....

P0171 is BACK again......

No drivability issue whatsoever and car feels powerful as before. No effect on fuel consumption or idling.
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Old 02-20-2011, 05:43 PM   #313
Darryl
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hey txl146,
Mine drove the same ce light or no ce light; no dirvability issues at all. I still haven't seen it come back yet. No rhyme nor reason. It just comes and goes. I'd begun to accept that it must be the ECU mapping (which I believe it really is, but am not equipped to prove that).
darryl
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Old 02-21-2011, 01:55 PM   #314
txl146
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One other possibility I can think of is crossover pipe gaskets, but car is not making any high pitch noise or sound that will point to that area.

All other exhaust manifold gaskets have been replaced. Exhaust manifold bottom gaskets have been replaced twice last year.

Since idle is perfectly fine, I don't think there is any vacuum leak.
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Old 02-21-2011, 02:12 PM   #315
JJsubie
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have you ever had your car tuned? sorry if im jumping in without reading too much before, but my experience is... I bought my car from someone who had it previously tuned. It turns out the tune was actually too lean around 2500 rpm so now that i have been tuned by my tuner everything is working great. The other thing that added to that was i had a short ram turbo inlet which has the maf sensor right next to the filter, i dont believe my car was previously tuned for it so that was a lot of excess air that the maf didnt know what to do with. sorry for the rant but i hope this helps
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Old 02-21-2011, 02:18 PM   #316
JJsubie
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i see that you have ordered the 02 sensor. i did that as well. if that doesn't get rid of it then i would still say it's the tune. It was inspection that got me too. Since the inspection place test is, "rev to 2500 and hold for at least 1 minute then let idle for 30 secs".. My check engine light came on during the test due to my tune. Once again, just informational, not sure if this is your scenario but i hope it helps
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Old 02-27-2011, 09:08 PM   #317
txl146
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After a week, CEL is back again. First time I had CEL 3 months ago, I cleaned pressure sensor, which seems to have fixed it.

Got the CEL again last Sunday, so I deleted the CEL and cleaned MAF sensor. Today, I got the CEL again, so I re-tightened plugs and re-seated air intake. I really am running out of ideas as to what can possibly cause CEL as car idles perfectly find at 21 inHg at idle and drivability is just fine.
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Old 02-28-2011, 12:39 AM   #318
GuamSTI
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Well just to add into this. When I had the CE code on my car it run very rich and gas consumption suffered. I have not had a code (knock on wood) since I replaced my turbo intlet hose.
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Old 02-28-2011, 02:06 AM   #319
Big Joe
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Suggest go back to post #1 in this thread and start checking off those possible fixes.

Also, to be absolutely sure this is not effecting your daily drive is by logging. Going lean during boost = .
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Old 03-04-2011, 09:27 PM   #320
xhengmanx
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Old 03-11-2011, 10:33 AM   #321
dbomb25
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Maybe I can get some help here. I bought my car about a month ago and shortly after driving off the dealer lot this code pop'd up and has not gone away. I went through the steps in post and started to check for all of them. I even through a scan tool on my car to troubleshoot the code and have come down to what I think is one of two problems either fuel pressure or maf.

My symptoms are strange. The car runs great and accelerates fine except between 3k and 4.5k rpm. The dies in power by about half and then surges like its trying to accelerate but it just cant something is holding it back and then when it passes 4.5k rpm it boosts fine.

Mods that I know of is aps front mount and aps 65mm intake and aps dv and aftermarket turbo but dont know what kind yet. It is tuned when I bought the car. Any ideas would be great thanks.
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Old 03-13-2011, 06:31 PM   #322
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After not driving my car for 2 months it gave me this code again I am just tired of trying to fix it
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Old 03-13-2011, 10:30 PM   #323
dbomb25
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I just wanted to write in that so far the car is running good. I had poor acceleration between 3-4k and crappy gas mileage. I replaced the maf today and was worlds better.
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Old 03-14-2011, 12:33 PM   #324
jrussell88
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great thread..it helped me out with my engine code
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Old 03-17-2011, 08:10 PM   #325
txl146
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Mine used to come up every 3-5 months, but now it comes on every 1-3 weeks.

I am also tired of trying to fix this problem. Think I tried pretty much everything you can think of.

Has anyone fixed this problem by replacing any of exhaust manifold gaskets?
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