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-   -   FIXED: Return of the P0171 and P0174 (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/93637-fixed-return-p0171-p0174.html)

bcredliner 09-09-2013 06:22 PM

Didn't upallnight notice the spike in a video?

diddy0071 09-09-2013 06:23 PM

Quote:

Originally Posted by bcredliner (Post 955427)
Didn't upallnight notice the spike in a video?

No, it was in one of the PDF files I posted up earlier in the thread.

diddy0071 09-09-2013 06:24 PM

Also, the fuel pump is at home now (I just confirmed with tracking number it arrived) I get home at 5ish, I'll work on it immediately. Wish me luck (god knows I fucking need it):rolleyes:

bcredliner 09-09-2013 06:40 PM

I do wish you luck.

diddy0071 09-09-2013 06:40 PM

Quote:

Originally Posted by bcredliner (Post 955433)
I do wish you luck.

Thanks. I'm starting to get this anxiety again...

bcredliner 09-09-2013 06:43 PM

I certainly know the feeling. I have both thrown my hands up from momentary defeat and sighed in relief that is finally over. Ultimately it was the latter.

upallnight 09-09-2013 07:30 PM

Quote:

Originally Posted by diddy0071 (Post 955428)
No, it was in one of the PDF files I posted up earlier in the thread.

IT WAS HERE

https://www.dropbox.com/s/a3cncemepa...20Loader_3.pdf

Rockit 09-09-2013 08:24 PM

I didn't read all the threads...I see most related to fuel. If your loosening power also check the exhaust for restrictions. When a cat converter goes bad it will do the same your describing when it heats up.

Easy way to tell is look under the car when it losses power and make sure the cat is now glowing red. Put your hand over the exhaust pipes with the car running...it should blow your hand off. If you can cover the exhaust pipe and your hand does not move it's usually restricted.

I think the BMW procedure was remove the 02 sensor and install a pressure gauge. I think normal back pressure was 7-10 psi...if more the clog was usually the cat.

A lot of things can cause this symptom including a mass air flow sensor but you should always check the common stuff first and cats go all the time.

If your car has been in an accident or flood it can be anything.

bcredliner 09-09-2013 08:35 PM

Quote:

Originally Posted by Rockit (Post 955450)
I didn't read all the threads...I see most related to fuel. If your loosening power also check the exhaust for restrictions. When a cat converter goes bad it will do the same your describing when it heats up.

Easy way to tell is look under the car when it losses power and make sure the cat is now glowing red. Put your hand over the exhaust pipes with the car running...it should blow your hand off. If you can cover the exhaust pipe and your hand does not move it's usually restricted.

I think the BMW procedure was remove the 02 sensor and install a pressure gauge. I think normal back pressure was 7-10 psi...if more the clog was usually the cat.

A lot of things can cause this symptom including a mass air flow sensor but you should always check the common stuff first and cats go all the time.

If your car has been in an accident or flood it can be anything.

Good rule of thumb is to read all the posts before contributing.

bcredliner 09-09-2013 08:40 PM

Quote:

Originally Posted by upallnight (Post 955442)

I knew it was astute observation. I know the alternator shouldn't be that high sitting at idle or driving down the road but what about free revs? The RPM reading in that snapshot is almost 5grand. Regardless, I would monitor it anyway.


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