Corksport SRI + K&N Filter - Constant P0171 code

[tehpeach]

Hey everyone,

I bought the CS SRI from another member on here more than a week ago. It came with a K&N filter that was in need of a cleaning, so after picking it up I cleaned and oiled it. Installed everything and the car ran great, did 40-50 miles of city driving and then hopped on the highway. As soon as I got up to 70mph in 5th gear the car displayed the CEL and was skipping and hesitating whenever I was just lightly pressing the gas pedal to maintain speed. Went to autozone and it was P0171.

I uninstalled the intake, cleaned/dried all the tubing, cleaned the MAF, and reassembled. Same thing happened. I've done this 3-4 times now and the CEL only gets triggered when I'm in 5th gear cruising.

Any thoughts?

 

[Gravity]

This happened to me once with my SRI, but only when I had used a 'custom' jury-rigged air duct. When i removed the duct, the code went away. It's an adaptive mix to lean code iirc?

Hey everyone,

I bought the CS SRI from another member on here more than a week ago. It came with a K&N filter that was in need of a cleaning, so after picking it up I cleaned and oiled it. Installed everything and the car ran great, did 40-50 miles of city driving and then hopped on the highway. As soon as I got up to 70mph in 5th gear the car displayed the CEL and was skipping and hesitating whenever I was just lightly pressing the gas pedal to maintain speed. Went to autozone and it was P0171.

I uninstalled the intake, cleaned/dried all the tubing, cleaned the MAF, and reassembled. Same thing happened. I've done this 3-4 times now and the CEL only gets triggered when I'm in 5th gear cruising.

Any thoughts?

 

[magnumP5]

P0171 is a "too-lean" fault code usually caused by a post-MAS or pre-oxygen sensor leak. I assume you haven't messed with the exhaust side of things so I'd first make sure there aren't any leaks around or after the MAS. Since it's a used product perhaps there's a tear in a coupler somewhere?

 

[tehpeach]

I was thinking it could have been the CS duct with a filter thats larger than the one that originally came with the part.. but it was installed on the previous 2 with no issues, and its currently not on my car due to my troubleshooting attempts. I also lubed the MAS o-ring per the CS instructions and it sits in there nice and tight. All the clamps are tightened and very snug. If I stay off the highway, the CEL eventually goes away but comes right back as soon as I've been cruising in 5th for 10-15 minutes, car still pulls nice and strong when at WOT, and idles smooth.

I'm going to check for vacuum leaks around the throttle body area later today.

 

[CorkSport]

Check to make sure the valve which sits on the silicone is sealed up ok, We have had one person which had a problem similar to what you are getting which was from that.

-Derrick

 

[tehpeach]

Thanks derrick, what can I use to ensure a better seal? Same lube as the MAS?

 

[CorkSport]

Thanks derrick, what can I use to ensure a better seal? Same lube as the MAS?

You can get a small clamp on it which will make sure it is sealed. It shouldn't be needed but it is one way to make it is sealed up.

-Derrick

 

[ngryffin]

I'm not sure if this was already mentioned but is the housing clocked to the right position, that threw a code for mine.

 

[CorkSport]

I'm not sure if this was already mentioned but is the housing clocked to the right position, that threw a code for mine.

That is also a possibility, thanks for posting up!

 

[tehpeach]

I'm not sure if this was already mentioned but is the housing clocked to the right position, that threw a code for mine.

Not quite sure I understand what you mean, could you elaborate?

 

[CorkSport]

Rotate the MAF housing so the sensor top is facing towards the front of the car at an angle, about 10-11 o-clock.

 

[tehpeach]

Rotate the MAF housing so the sensor top is facing towards the front of the car at an angle, about 10-11 o-clock.

gotcha, that may be it because the maf is current at about 2-3 o-clock. I'll rotate it and reset my ECU and let you guys know how it works out.

 

[JoeSakic19]

We have to re-oil the filter?! It's written not to do that on mine lol?

 

[CorkSport]

We offered the intake originally with a K&N filter which would require cleaning and re-oiling. Those filters have the K&N logo on the end cap. We decide to have our own filter made later which is made with the K&N hybrid filter media which does not require oiling after cleaning. Those filters have the logo "Corksport" on the end cap.

-Derrick

 

[magnumP5]

I'm not sure if this was already mentioned but is the housing clocked to the right position, that threw a code for mine.

I'm surprised this would have an effect unless something is moving in the MAS that would cause a problem. I didn't think anyone used "flapper" style mass airflow sensors anymore though. Any effect gravity has on the air should be very small.

 

[zps2004]

From helping work on the Sonics, we have seen that the clocking of the MAS effect the readings a good bit. Also just changing the filters can have a very large effect. Another thing we have seen is how close the filter is to a wall since it effects how even the air gets sucked into the intake tube. Modern cars are really sensitive to changes like that.

 

[CorkSport]

We kept the same size filter when we made the switch over to the hybrid media.

Derrick

 

[tehpeach]

After rotating my MAF, and driving through 2 tanks of gas mostly highway, I can say that my CEL is gone. Thanks ngryffin and Derrick!

 

[PGTBrow]

Well that's good to know there is a quick fix for that issue!

 

[zps2004]

CS should probably update the manual to either have a step to clock it, or a note to say what to do if you get the code.