Could this be detonation or pinging I hear?
#1
Could this be detonation or pinging I hear?
Under very specific circumstances, I hear what could be detonation or pinging. What I hear when I slowly add throttle is a "TICK, TICK, TICK, TICK............TICK, TICK, TICK, TICK........
I can only hear it if I have a "wall" around me, such as the sound reflecting off a guardrail or those cement barriers they put up near road construction, which seems to help echo the sound better.
But also only at very low speed, such as when I'm just adding throttle from stop and go driving. I never hear it when moving at speed or heavy throttle, though that could be because of road, engine, or exhaust noise masking it.
Has anyone heard this before? I recently ran a couple of tanks of 91 octane Shell, it hasn't changed anything.
I can only hear it if I have a "wall" around me, such as the sound reflecting off a guardrail or those cement barriers they put up near road construction, which seems to help echo the sound better.
But also only at very low speed, such as when I'm just adding throttle from stop and go driving. I never hear it when moving at speed or heavy throttle, though that could be because of road, engine, or exhaust noise masking it.
Has anyone heard this before? I recently ran a couple of tanks of 91 octane Shell, it hasn't changed anything.
Last edited by SD 197; 01-04-2013 at 01:37 AM.
#2
6th Gear Member
It sounds to me (no pun intended) that what you're hearing is injector noise. There's a TSB on it and a lot of S197 GT owners have complained about it. From your description, I doubt it's pinging but may also be a valve tap. If it's not loud enough to be heard unless within a walled area, it's likely a normal engine noise.
#3
Singing sounds like a baby rattle or a can with rocks in it being shaken. It can happen at part throttle, but it's doubtful. Probably injector noise. Mine are 60# injectors and are loud with the hood up but with the hood closed all I hear motor and exhaust.
#7
Oh man!! That video is scary!!
OP: If you are next to a wall and hear the 'tick tick tickticktick' sound, does the frequency get faster as MPH increases? MY .02 but definitely doesn't sound like detonation. As mentioned before - check the tire tread for a nice size rock/pebble. Before I changed my injectors, never heard the stockers.
With my Fox Mustangs, I'd have header gasket issues all the time and would make a ticking sound as well.
OP: If you are next to a wall and hear the 'tick tick tickticktick' sound, does the frequency get faster as MPH increases? MY .02 but definitely doesn't sound like detonation. As mentioned before - check the tire tread for a nice size rock/pebble. Before I changed my injectors, never heard the stockers.
With my Fox Mustangs, I'd have header gasket issues all the time and would make a ticking sound as well.
#8
I have to agree with the every one one the noise as injector noise or even the cam phasers. The 3V 4.6's & 5'4's in the F150's were notorious for sounding almost diesel like. I had a 2005 F150 w/ a 3V 5.4. Sounded awful at idle. Like moosestang said, once you hear pinging, it is a completely different noise. I had a 2010 GT w/ Bama tunes. Ran the 93 octane race tune. Had terrible problems with pinging @ WOT. Changed around with who I was getting gas from 3 or 4 times. Had to have the timing tweaked.
Edit; I know that comparing and F150 is not the same as the Mustang w/ the cam phasers. Just my expeiriance with that sort of sound for what it is worth.
Edit; I know that comparing and F150 is not the same as the Mustang w/ the cam phasers. Just my expeiriance with that sort of sound for what it is worth.
#9
It sounds to me (no pun intended) that what you're hearing is injector noise. There's a TSB on it and a lot of S197 GT owners have complained about it. From your description, I doubt it's pinging but may also be a valve tap. If it's not loud enough to be heard unless within a walled area, it's likely a normal engine noise.
You meant like the lash adjusters making noises and not the piston hitting the valves?
Last edited by JIM5.0; 01-05-2013 at 02:24 PM.
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