How to recognize false knock - Ford Mustang Forum
Like Tree6Likes
  • 3 Post By JBert
  • 3 Post By Cruzzin
 
LinkBack Thread Tools
post #1 of 3 (permalink) Old 4 Weeks Ago Thread Starter
Rookie
 
Cruzzin's Avatar
 
Joined: Apr 2019
Posts: 2
 
Hey all!
I’ve been tracking down what it looks like to me a false knock, I’m pretty familiar with knock sensors and what and how they do but in this case I’m stuck.
Usually when the engine hears a knock event it’ll pull timing gradually until the knock is gone, therefore you see the “step ladder” graph. In this case, when I go wot tight after 3700rpm the sensor goes to +6 and stays there, no step ladder. It just jumps straight to 6 and it’s always around 3700 rpm
I got good gas, 93 plus a gallon of e85 and still the same
Any ideas?
Thanks!
Also I should add the the car has 30k miles. Only upgrades are airaid race cai, occ, act tuner with strategy 93 tune passenger side

Cruzzin is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 4 Weeks Ago
SHELBY GT 350 Member
4.6L Member
S197 Member
 
JBert's Avatar
 
Joined: Jan 2011
Location: Central Massachusetts
Posts: 8,966
           
hmmmm . . . I dunno . . . but it makes me wonder if maybe the tune is putting in excessive spark advance at 3700 RPM and full throttle, that is causing knock, and the knock sensor is responding to that?


| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
JBert is online now  
post #3 of 3 (permalink) Old 3 Weeks Ago Thread Starter
Rookie
 
Cruzzin's Avatar
 
Joined: Apr 2019
Posts: 2
 
Quote:
Originally Posted by JBert View Post
hmmmm . . . I dunno . . . but it makes me wonder if maybe the tune is putting in excessive spark advance at 3700 RPM and full throttle, that is causing knock, and the knock sensor is responding to that?
I thought that so I put everything back to stock including tune but I noticed the same on the stock setup.
I’ll keep looking around but it looks like false knock.
Thanks
5.0 Coyote, JBert and Beechkid like this.
Cruzzin is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 


Search Engine Friendly URLs by vBSEO 3.6.1