kocking??

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Jan 16, 2005 | 04:46 AM

Monty

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2nd Gear Member

Joined: Feb 2004

Posts: 335

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kocking??

My car knocks at 1000 rpms thru 1600 rmps. But, it wont knock if i have it in netruel and just rev it up. Only when im barley cruising or accelerating. Any ideas what this is????

Jan 16, 2005 | 12:52 PM

mysticsvtcobra96

2nd Gear Member

Joined: Apr 2004

Posts: 492

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RE: kocking??

probably just need to run some higher octane fuel

Jan 16, 2005 | 04:28 PM

Dan04COBRA

6th Gear Member

Joined: Jul 2003

Posts: 14,917

RE: kocking??

What gears is it happening in, are you sure your not in too high of a gear at too low of a rpm and it's your tranny screaming at you...

Jan 18, 2005 | 02:32 AM

Monty

Thread Starter

2nd Gear Member

Joined: Feb 2004

Posts: 335

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RE: kocking??

I have an auto. So I know im in the right gear.

Jan 18, 2005 | 02:48 AM

stonemonk9

3rd Gear Member

Joined: Apr 2004

Posts: 715

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RE: kocking??

How many miles on car? Does the knock match engine speed?

Jan 18, 2005 | 11:14 AM

Monty

Thread Starter

2nd Gear Member

Joined: Feb 2004

Posts: 335

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RE: kocking??

70,000. And kinda. It just disappears after 1600 rpms

Jan 18, 2005 | 12:35 PM

Chopper

5th Gear Member

Joined: Feb 2004

Posts: 2,028

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RE: kocking??

Could it be a bad tune?It sounds like the timing is being advanced too quickly,or too much initial advance???Maybe it's running way lean???

Jan 18, 2005 | 12:43 PM

Monty

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2nd Gear Member

Joined: Feb 2004

Posts: 335

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RE: kocking??

Quote:

ORIGINAL: Chopper

Could it be a bad tune?It sounds like the timing is being advanced too quickly,or too much initial advance???Maybe it's running way lean???

hm.....maybe because it only does it once the car is warmed up. It is perfect when it's cold.But after about 15-20 min. it starts again. So does everybody think this is what's up?

Jan 18, 2005 | 01:56 PM

stonemonk9

3rd Gear Member

Joined: Apr 2004

Posts: 715

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RE: kocking??

pull out the stehiscope and start listenin, 70k ussually isnt enough miles for a rod knock, but if you beat on it or dont keep up on the oil, its possible, but ya id start listenin with that thing.