dmj291
Registered User
So i've had knock for a little while that's starting to drive me crazy.... I think it's injector related, but i'm not 100%. In an attempt to root cause the problem back to an injector, I cracked each injector line.... except #1 cyl, because the nut on the steel line wouldn't budge without possibly bending the steel lines... I've sprayed with PB blaster & will try it again tomorrow.
Just to note: Previous owner claimed to have replaced the IP & injectors (would have been within the last 20k miles)... & i'm assuming if you go through all that fuss you replace the return lines as well). One other thing to note, the truck turns over everytime without issue (leads me to believe air is not getting into the fuel system).
Here's a video of the sound.... it's an inconsistent noise (@0:18 the knock is almost gone, but at 0:25 its back and loud again)
https://www.youtube.com/watch?v=lpvfeRUkO6A
Any tips on what to look into? My thoughts are it's the #1 injector or return lines.
Just to note: Previous owner claimed to have replaced the IP & injectors (would have been within the last 20k miles)... & i'm assuming if you go through all that fuss you replace the return lines as well). One other thing to note, the truck turns over everytime without issue (leads me to believe air is not getting into the fuel system).
Here's a video of the sound.... it's an inconsistent noise (@0:18 the knock is almost gone, but at 0:25 its back and loud again)
https://www.youtube.com/watch?v=lpvfeRUkO6A
Any tips on what to look into? My thoughts are it's the #1 injector or return lines.