Compression Ignition Addict
Join Date: May 2009
Location: In the country south of Covington TN.
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
There are lots of things that can change the 'note' of the intake/exhaust sound. (Can you hear it in the exhaust as well?) Could be things like injector electrical issues like the UVCH, IDM etc. Injectors themselves or their o-rings. Could be mechanical issues like a bent push rod, valve/ring/piston failure. I'd start with a scan and cylinder contribution test to see if it is a weak cylinder. If one's found go from there. (buzz test, look into UVCH issues, compression test etc) I've heard engines of all sorts make that sound when a hole is weak. Good luck with it.
Randy DuCharme (Radio AD5GB)
'06 F-250 FX4 A/T Super Cab short box.
ARP head studs, Warren 175/30s, KC Turbo's DIY billet PMax, FASS Titanium 125G, River City Diesel sump, XDP regulated fuel return, IPR Research remote oil cooler & Gen III EGR delete, MBRP 4" turbo back, Stage II direct clutch and EPC solenoids, Warren and Gearhead tunes, Bilstein 4600s, Fumoto valves all around, boost, pyro and fuel pressure gauges.