Go Back   Ford Mustang Forums > Mustang > Classic Mustang > Classic Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

Classic Forums | Classic Talk | Classic Tech | Classic Pictures | Introductions | Mustang Tech | Mustang Lounge 


Reply   Post New Thread
Unread 11-16-2012   #1 (permalink)
havoc65 is offline Apprentice

Classic Member
V6 Member


Joined: Sep 2009
Posts: 215 Threads: 15
 havoc65's Country Flag
Yuba City   California
havoc65 is on a distinguished road
Default What does detonation/ping sound like exactly.

I've had my 65 for almost five years now and never had to mess with the timing. It's always ran great so I left it alone. Over the summer though my dizzy hold down bolt worked loose and the timing slipped. I borrowed a friends timing light and set it at 12* at idle with vacuum advance plugged. I noticed a rattling noise the other day when driving slowly through a parking lot. It occurred only at off idle when driving slowly. Now that my ears are tuned for it and it's windows up season I'm hearing it pretty regularly, again in parking lots and slow low speed traffic. It doesn't seem to do it when your giving it a lot of gas only when the throttle is cracked. I tried retarding my timing back to 6* and went to 91 octane fuel with no change. The car seems to run better at 12* so I went back to that for now.
I searched this forum and Google and most people say detonation sounds like a spray paint can rattling. This noise is more like a catalytic converter heat shield rattling, of coarse my 65 has no cats. It's also very hard to hear. While cruising the other night I asked my wife if she could hear it and she couldn't. How loud is engine ping? Too use the spray can analogy, does it sound like the can is being shaken slowly or very rapidly? Is obvious when you hear it?
The worst part is I'm not 100% sure it has anything to do with timing, it could just be a normal rattle this old girl makes and I just never noticed until I was really listening. The windows are down more than half the year too, many of the rattles are drowned out by wind noise. I'm just nervous about ignoring it and having major problems down the road. Sorry about the long post and thanks for your help.
__________________
Red 1965 coupe, 289 C-4
Edelbrock cam, intake, and carb, ported heads, try y headers, 2.5 inch dual exhaust, flowmaster 40s, electric fan, aluminum rad, disk brakes, full grab a track performance suspension, ect...

white 2003 convertible 3.8 auto
Fender-well CAI, 2.25 mandel bent dual exhaust, dynomax super turbo mufflers -Traded in but missed.

Race Red 2014 6mt Base. Barton Short throw shifter and bracket, 12" Alpine Type R and 500w Alpine amp in the trunk.
havoc65 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 11-16-2012   #2 (permalink)
2Manystangs is offline Banned

4.6L Member


Joined: Mar 2009
Posts: 12,916 Threads: 35
 2Manystangs's Country Flag
Tampa   Florida
2Manystangs is on a distinguished road
Default

yeah it sounds like the tinkling of metal...it would mostly appear in heavy acceleration esp near the redline, slow moving rattling is more than likely the brakes
2Manystangs is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-16-2012   #3 (permalink)
67ragtopStang is offline Made Member


Joined: May 2008
Posts: 850 Threads: 43
 67ragtopStang's Country Flag  View 67ragtopStang's 4 photos
Cape Cod   Massachusetts
67ragtopStang is on a distinguished road
Default

I'd describe the sound as like someone shaking a spray paint can under the hood. I have normally heard it on hard acceleration from stop or moderate acceleration at highway speeds.

I'm no expert mechanic, but I think good performance timing is best set by trial and error and not with a timing light. Try small adjustments above and below the 12 degrees BTDC.
__________________
I contend, that for a nation to try to tax itself, into prosperity, is like a man standing in a bucket and trying to lift himself up by the handle.
—Winston Churchill

1967 Mustang Convertible - 289-4V w/C4
1992 Bronco - 302 EFI Auto
1974 24' Lyman Biscayne
67ragtopStang is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-16-2012   #4 (permalink)
5.0ben is offline GT Member


Joined: Aug 2010
Posts: 1,312 Threads: 30
 5.0ben's Country Flag
Towson
5.0ben is on a distinguished road
Default

Sounds like this :


__________________

2012 5.0 Brembo, AED Performance Tune, Lethal Off-Road X, GT500 AB, 3.73, Airaid cai, GT500 SW :yelpleased:
2014 CX-5 Touring
Gone but not forgotten:
2011 Mustang GT|GT500 AB |FRPP Tune|6A
2010 Rav4 V6 | 07 Mazdaspeed3| 04 SRT4| 99 GSXR 750
2012 Camaro SS L99 Gone and forgotten
5.0ben is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-16-2012   #5 (permalink)
DJH1211 is offline PONY Member

4.6L Member


Joined: May 2010
Posts: 479 Threads: 13
 DJH1211's Country Flag
Kelowna   British Columbia
DJH1211 is on a distinguished road
Default

I think that yes, pinging sounds like a paint can shaken vigourously, but not nearly that loud. More like hearing someone shaking the can in the next room (you know, kind of muffled).

It occurs when lugging the engine momentarily, let's say, driving at low rpm in second gear and stepping on the throttle moderately hard. It's only for a couple of seconds or so until the engine is revving more freely again.

That's not the symptoms you have described, so it's something else.
__________________
SLITHER
DJH1211 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-16-2012   #6 (permalink)
Ivy66GT is offline SHELBY GT 350 Member

Classic Member


Joined: Dec 2008
Posts: 5,335 Threads: 101
 Ivy66GT's Country Flag
Albuquerque   New Mexico
Ivy66GT is on a distinguished road
Default

Marbles in a can so, yes, a spray paint can is a good example. It will happen when the engine is under heavy load and has little to do with high RPM. Floorboarded at 30-40 MPH is when my C-code C4 likes to knock. Ease back the accelerator pedal and the rattle stops; push the pedal harder and it rattles. At higher or lower speeds it hardly ever knocks.
Ivy66GT is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-16-2012   #7 (permalink)
havoc65 is offline Apprentice

Classic Member
V6 Member


Joined: Sep 2009
Posts: 215 Threads: 15
 havoc65's Country Flag
Yuba City   California
havoc65 is on a distinguished road
Default

Thanks for all the good replies and the video link. What I'm hearing sounds more like a rattle and less like the noise in the video so I don't think its ping. I climbed under the car and tried to find the source of the noise but I can't find it.
__________________
Red 1965 coupe, 289 C-4
Edelbrock cam, intake, and carb, ported heads, try y headers, 2.5 inch dual exhaust, flowmaster 40s, electric fan, aluminum rad, disk brakes, full grab a track performance suspension, ect...

white 2003 convertible 3.8 auto
Fender-well CAI, 2.25 mandel bent dual exhaust, dynomax super turbo mufflers -Traded in but missed.

Race Red 2014 6mt Base. Barton Short throw shifter and bracket, 12" Alpine Type R and 500w Alpine amp in the trunk.
havoc65 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-17-2012   #8 (permalink)
ic237 is offline Apprentice


Joined: Jan 2010
Posts: 204 Threads: 11
 ic237's Country Flag
Sunrise   Florida
ic237 is on a distinguished road
Default

Best place to hear it, is when driving on a hwy at night time. In my area we have an one lane overpass that has a 3 foot wall on both sides. Stepping on the gas you can certainly hear it with the windows down. I caught my car doing this when I skimped and put 87 octane in a 91 octane car. Normal driving in the city or highway, cant be heard in my case.
ic237 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-17-2012   #9 (permalink)
Joes72/65 is offline GT Member


Joined: Jun 2009
Posts: 1,462 Threads: 33
 Joes72/65's Country Flag
Imperial Beach   California
Joes72/65 is on a distinguished road
Default

To me it sounds like mechanical Rice Krispies, if you can imagine such a thing.
__________________
Joe
'65 Coupe, 302, Autolite 4100, C4, 2.80
'72 Grande, 351C, Motorcraft 2100, FMX, 2.75
Joes72/65 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-19-2012   #10 (permalink)
MustangBrandon is offline Apprentice

Classic Member


Joined: Apr 2012
Posts: 190 Threads: 18
 MustangBrandon's Country Flag  View MustangBrandon's 1 photo
LA   California
MustangBrandon is on a distinguished road
Default

Quote:
Originally Posted by Joes72/65 View Post
To me it sounds like mechanical Rice Krispies, if you can imagine such a thing.
Wut? Lol
My car has been plagued by a mystery rattle for over a year but its coming from the rear end. Still can't find it to this day....

(Btw I don't mean to threadjack)

Sent from my SCH-I405 using AutoGuide.Com Free App
MustangBrandon is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162