Join Date: Jul 2007
Feedback Score: 0 reviews
The knock is likely just a fuel knock, but you've got a fuel pressure or injector issue, maybe one is leaking and fueling all the time. A contribution test will show this though.
I would also add that I used to also run 1/2 bottle of Diesel Kleen every tank, but think that may have been contributing to some intermittent smoking I was experiencing. I had an injector that was just a tad out of spec that I replaced as well, but what really seems to have stopped it was discontinuing the use of the Diesel Kleen. Now I dump a quart of 2-stroke oil in it at every fill up and think I'm doing the best I can for lubricity doing that. I may run some Diesel Kleen through it once a year just to make sure everything is cleaned out, but I think its a product that can be overused. And no, I don't think that's what's causing your problem, though it may be exacerbating it.
'06 F250 4x4 - 5" Flo Pro exhaust, SB Filter intake, Accufab elbow, Edge Evolution (monitoring only), SCT w/ ID custom tune, FASS 195 pump, Gillette Diesel EGR cooler delete, Sinister Diesel coolant filter, ELC coolant, updated turbo drain tube/oil feed line/STC fitting/oil cooler, ARPs w/OEM HGs, Elite coolant lines, ITP RR fuel system, RCD 175/30 injectors, Powermax, BD CCV, FICM.com FICM w/ ID tune, Elite UP, BPD water pump - 13.069 @ 101.94
'02 WRX - Outback rear disc swap, EBC green pads, DBA pillar vane rotors, TXS UP/TBE/TMIC, Perrin LW crank pulley, PPG billet steel shift forks, ACT Streetlite flywheel & clutch, K&N filter, STi Group N motor/trans mounts, TiC/Kartboy rear diff mounts/subframe lock bolts/outrigger stiffeners, Kartboy SS & all shifter bushings, custom PDX tune for Cobb AP - went 14.1 on a terrible 60ft before most of these mods; shooting for 13.50s