Just added K&N CAI and power is down (?)
#1
Just added K&N CAI and power is down (?)
It took a bit longer to install mainly due to poor pics in the instructions. The only area I had a problem was putting the temperature sensor in the tube....It is a really tight fit buts its in and connected. It sounds phenomenal under hard throttle but feels like it isnt pulling as hard as it did with the stock intake. Is it just the sound thats throwing me or could something else be going on ? I have done about 20 miles on the intake. Will it take longer for the computer to learn the changes? All advice gratefully accepted !
Steve
Steve
#2
Join Date: Jul 2007
Location: South Georgia/East Florida
Posts: 24,686
Likes: 0
Received 20 Likes
on
19 Posts
It could be that it will take the PCM time to adjust to getting more air or you could have damaged an O2 sensor during the install. The PCM is a gradual learning process, and the longer it's been, the longer it'll be for it to adjust. Think about it as an "average" type thing. If you do an mpg mod and you start getting 2 mpg better than before, it'll take forever for your avg. mpg's to go up if your truck has 50,000 miles on it than 5000.
A way around this is to reset your PCM, it'll then register the change and adjust itself accordingly almost right away. But if your performance is truly worse than before, then you probably damaged the sensor...
A way around this is to reset your PCM, it'll then register the change and adjust itself accordingly almost right away. But if your performance is truly worse than before, then you probably damaged the sensor...
#3
#6
#7
Again - why would anyone assume the computer will learn any faster after a reset? It's always interpreting data and making adjustments. Sure, it's quicker to pull timing than to give it but it'll be the same after a reset so what are you gaining?
The ECU's data set is always a window of X amount of time. Your current state of tune is anything it's learned within that timeframe, not from its entire lifetime or the time since its last reset.
Anyway, did you make sure the temp sensor was square inside the tube -- that it has airflow hitting head-on? If it's twisted it won't get as true a reading.
Also, you can clean the throttle body just fine with the engine running. You can spray cleaner then, or you can have the engine off and do a more thorough cleaning. You won't hurt the butterfly by opening it to clean.
The ECU's data set is always a window of X amount of time. Your current state of tune is anything it's learned within that timeframe, not from its entire lifetime or the time since its last reset.
Anyway, did you make sure the temp sensor was square inside the tube -- that it has airflow hitting head-on? If it's twisted it won't get as true a reading.
Also, you can clean the throttle body just fine with the engine running. You can spray cleaner then, or you can have the engine off and do a more thorough cleaning. You won't hurt the butterfly by opening it to clean.
Trending Topics
#8
Thanks John. Yes, the temperature sensor is protruding into the tube and is aligned to catch the air-flow. I have a Cobra replica running a BossEFI system and from experience, I know it takes a hundred miles or so of driving for it to interpolate values in the supplied fuel map.
Back to the truck, I did notice that the computer mpg was REALLY bad just after I reset it for 10 miles or so. I can now get it to read over 20mpg in cruise at 60mph.
The K&N instruction sheet does say disconnect the battery negative before install. Of course I thought I knew better so I didnt.....
Steve
Back to the truck, I did notice that the computer mpg was REALLY bad just after I reset it for 10 miles or so. I can now get it to read over 20mpg in cruise at 60mph.
The K&N instruction sheet does say disconnect the battery negative before install. Of course I thought I knew better so I didnt.....
Steve
#9