engine knock

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Aug 30, 2007 | 09:56 PM

mithrander

Thread Starter

Instructor

Joined: Jun 2007

Posts: 121

Likes: 6

From: san luis obispo area CA

engine knock

my 01 MN6 has a pretty good knock at WOT. I have borla catback and vararam intake. Any suggestions for fix

Aug 30, 2007 | 10:06 PM

orangejuice

Instructor

Joined: Jan 2007

Posts: 100

Likes: 0

From: iowa

the engine knocks?? That ain't good, could be a broken piston, how is the oil pressure/ could be a rod bearing also. More details are needed

Aug 30, 2007 | 10:25 PM

rws.1

Race Director

Joined: Jul 2004

Posts: 16,795

Likes: 62

From: Lake Havasu City, AZ

Mine did the same thing.
The Vararam leans out the engine.
Try higher octane gas
Try decabonizing the engine ( Seafoam or GM top engine cleaner)
Get a tune.

Aug 30, 2007 | 10:41 PM

orangejuice

Instructor

Joined: Jan 2007

Posts: 100

Likes: 0

From: iowa

pinging and knocking are different sounds, hope that is all he needs.

Aug 30, 2007 | 11:11 PM

DJMRTS

Burning Brakes

Joined: Mar 2003

Posts: 874

Likes: 0

From: Bonita CA

pinging and/or knocking will still make your knock sensors pull timing.

Aug 30, 2007 | 11:37 PM

TAZZVETTE

Instructor

Joined: May 2004

Posts: 240

Likes: 0

From: Bay Area CA

Try a 20oz. bottle of CHEVRON Techron Concentrate Plus...Works for me

Aug 31, 2007 | 01:11 AM

Van5150

Instructor

Joined: Jul 2006

Posts: 136

Likes: 6

Catch Can ?

Aug 31, 2007 | 03:00 AM

imiuru

Intermediate

Joined: Nov 2006

Posts: 36

Likes: 0

From: Nipomo CA

I have experienced the same thing in third above 5k at wot and in 4th above 4.5k wot, It is a little predetonation. I was thinking I needed the tune......at higher speeds it must be stuffing a little more air
maybe its just the cooler coastal air

Last edited by imiuru; Aug 31, 2007 at 03:03 AM. Reason: add more