- Jun 1, 2012
- 932
Alright it's been a while since I have had time to post this but here we go. When my heater is on in the truck I get this sound in the engine what sounds like a knock it only does it once after every stop light 0 to 45mph±. Is it possible that the k&n metal air intake tube and the 9" LARGE AEM prodry filter has anything to do with it ? Only has hmm about 58k miles. It also bogs like a mofo sometimes which I'm assuming is the large airfilter (I cut out the OEM air cleaner cover and use that to cover the filter because its a cone filter and way way too loud.