P0171: System too lean (bank 1)
Thread Starter
Evolving Member
iTrader: (2)
Joined: Jun 2004
Posts: 278
Likes: 0
From: Buffalo New York
I used an inscents stick to check for any air draws on the whole intake system, and couldn't find anything. So i took out the mass airflow sensor, it was a little grimey so i sprayed it down with brake cleaner. The o-ring on the sensor was a little stretched out, and i happened to have one the right size in my garage. I replaced that and lightly lubed it with a light weight gun oil. It seemed to fit in better, and sealed right down.
Then I disconnected the cold air intake from the rubber flex pipe by the intake manifold, cleaned the surface areas, used a little more gun oil and put it back on. The rubber flex pipe definately slid on to the CAI further, and had more of a solid seal.
After about 40 minutes of driving i noticed a smoother idle and rev. So far, no code. I'll be going for a longer drive this evening, so we'll see what happens. I have a feeling that it was just a combination of poor seals and a dirty sensor. Time will tell.
Then I disconnected the cold air intake from the rubber flex pipe by the intake manifold, cleaned the surface areas, used a little more gun oil and put it back on. The rubber flex pipe definately slid on to the CAI further, and had more of a solid seal.
After about 40 minutes of driving i noticed a smoother idle and rev. So far, no code. I'll be going for a longer drive this evening, so we'll see what happens. I have a feeling that it was just a combination of poor seals and a dirty sensor. Time will tell.
i've got the same problem man, from day 1 after putting RRM's CAI i'v been getting the same code...i've re-tightened everything...put the stock back on...checked everyway i no how for leaks...i think its just the intake
My car threw a CEL the other day, but I didn't bother getting the code pulled. I didn't notice any difference in driveability, so I drove it the rest of the way home, and reset the ECU. Hasn't come back since.
Originally Posted by MitsuSkot
# The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters (K&N, etc.) can cause the MAF to become dirty if the filter is over-oiled
i was just outside messing with the MAS and i realized that my hole in the intake isn't perfectly round...could someone with the RRM CAI go look under there hood and see if there O-ring is completely incased or if its supposed to stay atop. thanks
For those of you that cleaned the MAF with cleaner etc. What all did you spray down or not spray? I have a used MAF that needs cleaning and I want to make sure I don't mess it up before installing.
WADAD
WADAD
Last edited by WADADLIG_OZ; Apr 24, 2006 at 02:39 PM.
Originally Posted by WADADLIG_OZ
For those of you that cleaned the MAF with brake cleaner etc. What all did you spray down or not spray? I have a used MAF that needs cleaning and I want to make sure I don't mess it up before installing.
WADAD
WADAD
Mike
Originally Posted by 2004Ralli//art
hmmm...thats my problem...the hole isn't big enough! i got rooked!
Originally Posted by 2004Ralli//art
i'll probably just save the trouble and use a round file 




.. well cigarettes anyway..
