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Old 07-12-2002, 04:16 PM   #1
Reflex-Arc
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Default What could be causing my "ping"?

First of all, I'm only assuming that's what I'm hearing. It sounds a bit like gravel in an empty coffee can.

It's only happens under load (like when going up hill) and it seems to happen almost exactly at 2500 rpm. Is this normal? Should I just be in a lower gear?

I've got fairly basic engine mods; ganflow intake, K&N filter, and a brullen 2.25 catback. I've also switched plugs to the NGKs that are so popularly reccomended here, if that makes a difference. Could any of these mods cause this?

I typically run 89 octane gas. The sound seems worse on the 87 and the car seems to idle rough on the 92 octane. Though I do have to say that the sound is less noticable on the 92, still there but not as often.

So what do you think? Am I just being an automotive hypochondriac n00b, or does it sound like I have a mechanical issue here.
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Old 07-12-2002, 04:40 PM   #2
grubaru
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The sound is different with different octanes? I would think that it's engine knock. Are all of your upgrades fastened securely? Where exectly are you hearing this ping? Under the hood? Under you? Towards the back of the car?
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Old 07-12-2002, 04:48 PM   #3
Reflex-Arc
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I'm assuming that it's coming from under the hood, but honestly I cant be 100% positive on that because I can't duplicate the sound while the car is parked. That's kind of why I don't think its any of my mods vibrating.

Edit: It kind of sounds like a spray paint can being shaken.
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Old 07-12-2002, 04:49 PM   #4
ciper
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Maybe you have alot of carbon crap built up that is causing preignition.
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Old 07-12-2002, 04:52 PM   #5
Reflex-Arc
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Could be.
But I recently ran a bottle of Chevron's FI cleaner through. Should I give that another shot?
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Old 07-12-2002, 07:06 PM   #6
HudsoN456
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Don't worry, it's normal. I get it too, and I've tested other RS's who have the same thing. Octane doesn't make a difference for me, it will happen like clockwork if I'm going up a hill in too high of a gear. Don't sweat it, just downshift.
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Old 07-12-2002, 07:19 PM   #7
Reflex-Arc
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Fair enough! Thanks for the info.
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Old 07-12-2002, 10:21 PM   #8
Jademonkey
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Quote:
Originally posted by HudsoN456
Don't worry, it's normal. I get it too, and I've tested other RS's who have the same thing. Octane doesn't make a difference for me, it will happen like clockwork if I'm going up a hill in too high of a gear. Don't sweat it, just downshift.
Damn, I though I was the only one. I was going nutts over trying to get this fixed. I de modded my car, ran 91 gas for 2 weeks, and still the same noise.

My brother listened to it, and he said it's not "engine ping."

I also had a ****load of pebbles between my cat and shielding. That cut the noise down a lot...but my symptoms are the same...this rattling/buzzing noise at a specific RPM. I imagine there is something on our cars, which loves to vibrate at a certain frequency...
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Old 07-13-2002, 03:26 AM   #9
djinn1973
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I would atleast get it checked out, also if it happens going only up hill maybe have the axel shafts checked?
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