Knock under light load

[Thatredspeed3]

So I have been having this problem with a very light knocking noise under light load at around 2500-3000 rpm’s and it only occurs in 3rd-6th gear, I have ruled out most things like rod knock, timing chain, and drive train noises. KR sits at a constant 0 when it is happening, the noise sounds like it is coming from the right side of the engine bay, the noise instantly disappears at WOT. any insight or ideas would be greatly appreciated, at this point I’m grasping at straws

Here is a mod list

• Built motor by overspeedd motorsports have build sheet (roughly 12000 miles)
• koyorad radiator
• jmf v2 port injection manifold with id1050 injectors and bosch 4 bar map sensor
• ACT 6 puck clutch with streetlite flywheel
• Kozmic motorsports vented oil catch can
• Precision 5558 v2 ball bearing turbo 82 ar
• ngk6510 one step colder plugs gapped at (.022)
• cobb front mount intercooler with turbo xs piping
• 44mm tial MVR wastegate with DTP fab pipe -gfb blow off valve
• oem slave cylinder with new fork
• oem gaskets all around and thermostat and waterpump and sensors (less than 2 years old)
• oem mazda oil spin filter conversion all new red HPS coolant hoses
• New starter
• 51r battery tray
• late night racing oil cap vented to catch can
• Damond egr delete kit Damond PCV plate

Damond triology motor mounts

• Grimmspeed boost solenoid
• CPE exhaust manifold v-band
• CPE catless downpipe V-band
• Split second controller for port injection
• Apv3 accessport tuned by Damond

Motorsports

• Graveyard performance returnless fuel system
• Graveyard performance 4 inch intake
• Amsoil Boosted series oil
• GT interior swap with the homelink mirror
• Hellcat fuel pump just installed
• Brand new 17x8.5 35mm mr159 Motegi

Wheels w/ 235/45 NT05 tires

• Steel braided brake lines with new powder coated calipers
• AEM AFR Guage

 

[DISIFTW]

Assuming right side means you're inside the car so passenger side? Have you checked your belt/tensioner, axles, and everything in that area to make sure nothing is moving around?

 

[Thatredspeed3]

Assuming right side means you're inside the car so passenger side? Have you checked your belt/tensioner, axles, and everything in that area to make sure nothing is moving around?

I have, but it’s hard to say anything since it only happens when I’m driving, I recently replaced the left CV axle because it had a bit of play but there was no change.

 

[originalmarshmello]

A bit of a long shot, since you said that your noise only happened from 3rd to 6th and disappeared at WOT, but I’ll leave this here in case it helps.

A friend of mine had a first gen speed3 with a knocking sound coming from the right side of his engine bay and it turned out to be the aftermarket corksport aluminum coolant reservoir rattling around.

Moral of the story is make sure your coolant, power steering, and other reservoirs are properly attached.

Try wiggling them lightly with your hand to see if any are loose, and tighten if need be. The damond mounts will shake anything loose around which can cause a rattle…