NOISE...DETONATION??

DDSTANG94

New Member

Dec 9, 2006

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FRASER, MICHIGAN

Jun 30, 2007

#1

• Jun 30, 2007

• #1

WHEN i give my car wot there is a noise like a metal slapping something or like a loud tic (kinda) but its more like a "tinging" noise.....i think its detonation timing is a 12* on 87 octane....any suggestions???



Thanks guys!!!!

 

R

red95gtconvert

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May 29, 2006

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Ponca city, OK

Jun 30, 2007

#2

• Jun 30, 2007

• #2

Run some Seafoam through it, put higher octane fuel in or back the timing off a little bit.

 

Stanger007

Founding Member

Sep 26, 2001

2,015

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46

Baton Rouge, LA

Jun 30, 2007

#3

• Jun 30, 2007

• #3

That sounds like detonation that you are hearing.

+1 on the comment above.

 

R

RAD

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Jun 16, 2006

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Jun 30, 2007

#4

• Jun 30, 2007

• #4

My car is pinging in hot days but 93 octane fuel cured it.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Jun 30, 2007

#5

• Jun 30, 2007

• #5

Agreeed. If this is a new noise, it's likely detonation. As everyone said, back your timing down a couple degrees or up the octane.

Good luck.

 

DDSTANG94

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Dec 9, 2006

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FRASER, MICHIGAN

Jun 30, 2007

#6

• Jun 30, 2007

• #6

thanks guys. i think ill try some 93 octane

 

D

dstang01

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Sep 22, 2005

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Vancouver, BC

Jun 30, 2007

#7

• Jun 30, 2007

• #7

Does anyone know how many degrees the stock timing can be bumped so that the car will still run safely on 87 octane? Sorry if I hijacked, im just lookin for a quick answer

 

HISSIN50

"How long does it take to get help in here?

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#8

• Jun 30, 2007

• #8

dstang01 said:

Does anyone know how many degrees the stock timing can be bumped so that the car will still run safely on 87 octane? Sorry if I hijacked, im just lookin for a quick answer

Click to expand...

There's no magic number - especially on these ping machines. State of tune, ambient temps, how well the MAF is functioning and many other factors play into it.

You will really just have to experiment. Keep bumping till you start to hear pinging and then back it down 1-2* if it's summertime (you might need more if you do this during the winter). There's a point where power goes down but pinging isnt heard by the human ear (the cars always ping - we just dont normally hear it). This is a reason to not run on the ragged edge of detonation.

Good luck.

 

DDSTANG94

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Dec 9, 2006

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FRASER, MICHIGAN

Jul 1, 2007

#9

• Jul 1, 2007

• #9

one more thought on this problem, mine only does it when the motor is warmed up, if its cold and i give it wot it doesn't make any noise. Also whenthe motor is warmed all and I give it wot, the temp gauge goes up higher than it normally runs.....do u guys still think its detonation??

 

R

red95gtconvert

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May 29, 2006

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Ponca city, OK

Jul 1, 2007

#10

• Jul 1, 2007

• #10

It sure sounds like detonation to me. I think 10* of timing is all you are going to get by with on 87 octane.

 

Stanger007

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Sep 26, 2001

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Baton Rouge, LA

Jul 1, 2007

#11

• Jul 1, 2007

• #11

Yup, sounds like detonation dawg.

 

StinkinLincoln

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Dec 9, 2006

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Louisiana

Jul 2, 2007

#12

• Jul 2, 2007

• #12

more heat causes it to detonate easier.
to raise the timing, can it be done at idle and then hear the pinging and back it off for does it need to be wound up?

 

HISSIN50

"How long does it take to get help in here?

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Jul 2, 2007

#13

• Jul 2, 2007

• #13

StinkinLincoln said:

to raise the timing, can it be done at idle and then hear the pinging and back it off for does it need to be wound up?

Click to expand...

The engine needs to be under load to test for detonation.

 

StinkinLincoln

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Louisiana

Jul 3, 2007

#14

• Jul 3, 2007

• #14

so raise the timing a few degrees and get on it, hear some pinging, then back it down 2 and try it again basically?

 

HISSIN50

"How long does it take to get help in here?

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Jul 3, 2007

#15

• Jul 3, 2007

• #15

StinkinLincoln said:

so raise the timing a few degrees and get on it, hear some pinging, then back it down 2 and try it again basically?

Click to expand...

That works.

 

badstang123

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Jan 17, 2006

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Santa Clarita, CA

Jul 3, 2007

#16

• Jul 3, 2007

• #16

You are fortunate. Detonation has been the story of my ownership of the vehicle running 91 octane (The best you can get in California) and the stock ten degrees. No matter how many sensors I replace or how much seafoam I run through the thing it still pings.
- Justin

 

DDSTANG94

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FRASER, MICHIGAN

Jul 4, 2007

#17

• Jul 4, 2007

• #17

is onyone running 14* with 93 octane without problems or is 12 about all im gunna hett out of 93

 

9

94 Black GT

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Nov 25, 2007

#18

• Nov 25, 2007

• #18

i know im bringing up an old thread but i was just curios what seafoam is and what it will do?? thanks guys..

 

94mustangcobra

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Valdosta, GA

Nov 25, 2007

#19

• Nov 25, 2007

• #19

what type of plugs are you running too, aren't certain types more likely to detonate than others, wich is why you don't run them on nitrous or blower combos. just tossing the idea out there

 

HISSIN50

"How long does it take to get help in here?

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Nov 25, 2007

#20

• Nov 25, 2007

• #20

94 Black GT said:

i know im bringing up an old thread but i was just curios what seafoam is and what it will do?? thanks guys..

Click to expand...

A search (on here or Google) will reveal more than you ever wanted to know.
It's just a top-end cleaner.

94MustangCobra is talking about plug heat ranges. Too cold and they foul, too hot and they begin to favor preignition.