mcbagpiper
Member
Hi everyone,
Since purchasing my 2014 Raptor SCREW almost a month ago, I've been chasing various sounds and rattles trying to resolve them. I took off the driver side door panel to fix the rattling lock mechanism, that was pretty quick and easy. I've also adjusted my shocks (King 3.0's) to try and minimize their various chirps and squeaks. I know..."race parts = race noise", but the rear shocks would chirp on every small crack/bump in the road - thankfully it was just a matter of stiffening up some of the settings which had previously been put to full soft. The rebound in particular was causing the noise from the rear, which was very irritating.
However, there's one noise I can't seem to trouble shoot, so hoping you folks can assist. I've noticed a noise coming from the front end when accelerating (never when decelerating). It's tough to describe, almost a hum or buzz that occurs very briefly if you happen to use just the right amount of gas. If for example I'm starting from a stop light and accelerate with light pedal application it typically won't occur. However, if I'm using moderate gas pedal application I'll hear this hum/buzz for a couple of seconds and then it disappears again as the revs continue to rise. I've noticed that I can hear it when accelerating, then the revs climb above the buzz and the truck shifts gears and when the rpms drop briefly as it goes to the next gear I'll hear the buzz quickly again before the revs continue to climb. I thought it was happening in one particular range within the revs (as I posted in the intro forum), but I've watched my tach this past week and it's not actually connected to any specific point of the range - more so the amount of gas being applied - i.e. amount of load being applied to the engine. I can also feel a slight vibration in the gas pedal when this noise occurs.
I've greased the slip yoke and replaced my u-joints - the truck as 144,000km's (~ 90k miles) so I replaced the joints just in case that's what was starting to cause a slight vibration...but no change. I don't notice any changes to the noise when using 4W, same noise and vibration in the pedal for that 1-2 seconds - so I'm not suspecting IWE issues.
The truck has a Borla s-type exhaust and AFE CAI installed, so I'm wondering if maybe it's just a combination of frequencies between the exhaust/intake and the engine that's causing the noise? Has anyone with either of these two aftermarket parts noticed anything similar?
This morning, while driving to work, I tried putting the truck in manual shifting mode and I didn't notice the sound. I'm thinking the truck is likely programmed to shift earlier than needed, for fuel economy, and it creates a momentary bogging of the engine. Bogging would create more vibration from the engine, which combined with the exhaust and CAI might be combining to make this "perfect storm" for a brief moment?
Any other suggestions?
Since purchasing my 2014 Raptor SCREW almost a month ago, I've been chasing various sounds and rattles trying to resolve them. I took off the driver side door panel to fix the rattling lock mechanism, that was pretty quick and easy. I've also adjusted my shocks (King 3.0's) to try and minimize their various chirps and squeaks. I know..."race parts = race noise", but the rear shocks would chirp on every small crack/bump in the road - thankfully it was just a matter of stiffening up some of the settings which had previously been put to full soft. The rebound in particular was causing the noise from the rear, which was very irritating.
However, there's one noise I can't seem to trouble shoot, so hoping you folks can assist. I've noticed a noise coming from the front end when accelerating (never when decelerating). It's tough to describe, almost a hum or buzz that occurs very briefly if you happen to use just the right amount of gas. If for example I'm starting from a stop light and accelerate with light pedal application it typically won't occur. However, if I'm using moderate gas pedal application I'll hear this hum/buzz for a couple of seconds and then it disappears again as the revs continue to rise. I've noticed that I can hear it when accelerating, then the revs climb above the buzz and the truck shifts gears and when the rpms drop briefly as it goes to the next gear I'll hear the buzz quickly again before the revs continue to climb. I thought it was happening in one particular range within the revs (as I posted in the intro forum), but I've watched my tach this past week and it's not actually connected to any specific point of the range - more so the amount of gas being applied - i.e. amount of load being applied to the engine. I can also feel a slight vibration in the gas pedal when this noise occurs.
I've greased the slip yoke and replaced my u-joints - the truck as 144,000km's (~ 90k miles) so I replaced the joints just in case that's what was starting to cause a slight vibration...but no change. I don't notice any changes to the noise when using 4W, same noise and vibration in the pedal for that 1-2 seconds - so I'm not suspecting IWE issues.
The truck has a Borla s-type exhaust and AFE CAI installed, so I'm wondering if maybe it's just a combination of frequencies between the exhaust/intake and the engine that's causing the noise? Has anyone with either of these two aftermarket parts noticed anything similar?
This morning, while driving to work, I tried putting the truck in manual shifting mode and I didn't notice the sound. I'm thinking the truck is likely programmed to shift earlier than needed, for fuel economy, and it creates a momentary bogging of the engine. Bogging would create more vibration from the engine, which combined with the exhaust and CAI might be combining to make this "perfect storm" for a brief moment?
Any other suggestions?
