i am having this exact problem like three days after installing the k+n cold air intake. i emailed k+n this is my reply. i like the end part
also i did not inform the k+n service that my truck is randomly stalling when i hit my clutch
Dec 29 (2 days ago)
hello my name is brad and i have intstalled a k&n high flow air filter kit (the black pvc one)
part no 57-9015-1. it is installed on a 2001 toyota tacoma 3.4l. i am very happy with the fit and finish of the kit. it went on easy and gave a pretty good difference preformance wise. i am emailing because i have just now (after 300kms) had the engine light come on on the dash. i have a code reader and when i read the code, it gives me a p0171-system too lean (bank 1).
my questions are:
-is the air filter oiled from the factory? i have heard that if any oil comes off of the filter and gets on the mass air flow sensor it can cause it to misread and lean out the engine.
-has this problem been reported to you before, and if it has, is there any other causes?
-it has gotten pretty cold up here in ontario (-15'C or lower) would this have an effect?
i have erased the code about 25 kms ago and it has not come back yet. i really like the product and appreciate your help in trying to fix the problem. thanks.
12:34 PM (8 hours ago)
Dear K&N Customer,
Thank you for contacting K&N regarding your experiences with the K&N intake system for your Tacoma. The intake system that you have listed is the correct kit for your vehicle, and practically all K&N air filters come oiled from our facility. However, the oil used on your air filter is not the cause for check engine lights per our testing and investigation into these claims of oil fouling a MAF sensor. If you are experiencing a check engine light and you believe that the problem is due to the K&N intake system, please double check the installation to ensure that the kit has no air leaks and that it is properly installed. If the problem persists, please contact our customer service line 1-800-858-3333 to speak with one of our dedicated agents for further assistance.
Thank you for writing,
K&N Engineering Inc.
(800) 858- 3333
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