Knock Sensor Placement - JeepForum.com
 
LinkBack Thread Tools
post #1 of 13 Old 02-10-2010, 11:28 PM Thread Starter
madjeep1
Registered User
1988 YJ Wrangler 
 
Join Date: Dec 2008
Location: Georgia
Posts: 192
Knock Sensor Placement

I am doing a "Junkyard" TBI conversion on my 88 YJ with a 258 4.2L. I am going to run a knock sensor and need some idea on where to put it. Has anyone done this conversion and where did you install it on the block? Thanks in advance.

madjeep1 is offline  
Sponsored Links
Advertisement
 
post #2 of 13 Old 02-11-2010, 10:22 AM
kloppk
Registered User
1992 YJ Wrangler 
 
Join Date: Oct 2006
Posts: 2,751
Your stock setup should already have one.

See... Knock Sensor

kloppk is offline  
post #3 of 13 Old 02-11-2010, 02:36 PM
markr1001
Registered User
1987 YJ Wrangler 
 
Join Date: Oct 2007
Location: Kingston, Ontario, Canada
Posts: 115
Injection Tech - Binder Planet Forums
check out the stickies on tis site, the guy is a TBI god and if you read it all you can walk through it pretty easy
markr1001 is offline  
 
post #4 of 13 Old 02-11-2010, 03:57 PM Thread Starter
madjeep1
Registered User
1988 YJ Wrangler 
 
Join Date: Dec 2008
Location: Georgia
Posts: 192
Thanks Kloppk, I know their is one in the intake but I wanted to put it in the block. I think it will be better to put it there.
Thanks Markr001, I have read his thread and used it along the way but he talks about their is a place to install the Knock sensor in front of the starter. On a Jeep there is no place in front of the starter. He is doing the conversion on a Scout so there prob. is one on those.
madjeep1 is offline  
post #5 of 13 Old 02-11-2010, 05:15 PM
Fhajad
Registered User
1993 YJ Wrangler 
 
Join Date: Jun 2009
Location: Greenfield
Posts: 1,932
If the engineers put one on the intake, then it's probably one of the best places to put it.
Fhajad is offline  
post #6 of 13 Old 02-12-2010, 05:41 PM
laybackman
Bikini Bridge Inspector
 
laybackman's Avatar
2010 JK Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 7,096
Quote:
Originally Posted by Fhajad View Post
If the engineers put one on the intake, then it's probably one of the best places to put it.
IIRC the old knock sesnors were usually located in the lower area of the block on the right hand side of the engine. But they seemed to detect a 'knock' that was often just bottem end noises. The 'fix' was to wrap extra teflon tape on the knock sensor threads. I guess they decided to locate them higher up in the engine to eliminate that problem.

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
laybackman is offline  
post #7 of 13 Old 02-12-2010, 07:18 PM
jay-h
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2006
Posts: 5,416
With tappet and all the other noises coming from a 4.2 block, the block is probably not where you want to put it.

The guys who designed this vehicle are not dummies. Don't second guess them without a really good reason.
jay-h is offline  
post #8 of 13 Old 04-04-2014, 10:07 AM
whiskeywiz
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Mar 2012
Location: Buffalo
Posts: 1,046
Old thread but hoping to resurrect.
You can't go by what JEEP engineers did when you are installing a GM tbi system.

Did you get the system installed and running? I'm looking for some dizzy help!
whiskeywiz is offline  
post #9 of 13 Old 04-06-2014, 08:54 AM
jay-h
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2006
Posts: 5,416
Quote:
Originally Posted by whiskeywiz View Post
Old thread but hoping to resurrect.
You can't go by what JEEP engineers did when you are installing a GM tbi system.
...
In this case I would disagree. The location of the knock sensor was based on acoustics, where there was the cleanest signal. A good location would be the same whether GM or Mopar or Edelbrock system.

My toys
'89 Wrangler YJ
'47 CJ2-A

wife's toys
97 Grand Cherokee (ZJ)
87 MB 560SL roadster
jay-h is offline  
post #10 of 13 Old 04-06-2014, 11:48 AM
whiskeywiz
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Mar 2012
Location: Buffalo
Posts: 1,046
Quote:
Originally Posted by jay-h View Post

In this case I would disagree. The location of the knock sensor was based on acoustics, where there was the cleanest signal. A good location would be the same whether GM or Mopar or Edelbrock system.
Then why aren't they the same?
whiskeywiz is offline  
post #11 of 13 Old 04-06-2014, 07:50 PM
jay-h
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2006
Posts: 5,416
Quote:
Originally Posted by whiskeywiz View Post
Then why aren't they the same?
Maybe I was unclear. The location of a knock sensor is dependent on the specific engine, not the FI system. Characteristics of the block, manifold, head etc. make some spots much better than others. During development the engineers get a good handle on the best spots, and choose one for the sensor.

If you put in a different FI, still the best spots for a sensor are unchanged.

My toys
'89 Wrangler YJ
'47 CJ2-A

wife's toys
97 Grand Cherokee (ZJ)
87 MB 560SL roadster
jay-h is offline  
post #12 of 13 Old 04-06-2014, 08:53 PM
whiskeywiz
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Mar 2012
Location: Buffalo
Posts: 1,046
Quote:
Originally Posted by jay-h View Post
The location of a knock sensor is dependent on the specific engine, not the FI system.
I thought it was specific to the sensor itself? My reasoning: a GM sensor will not work with a Mopar ECM.
whiskeywiz is offline  
post #13 of 13 Old 04-06-2014, 09:17 PM
whiskeywiz
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Mar 2012
Location: Buffalo
Posts: 1,046
Or is it that the sensor will not work with a diff ecm because of voltages, however its functional purpose remains the same?
whiskeywiz is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Knock Sensor?????? What Do You Know???????? sknys_93 YJ Wrangler Technical Forum 10 07-30-2008 03:25 PM
Knock Sensor Location Scott 93YJ YJ Wrangler Technical Forum 2 04-24-2007 12:13 PM
Knock Sensor? Stang5lgt YJ Wrangler Technical Forum 4 11-21-2005 10:35 PM
knock sensor J_UMPER YJ Wrangler Technical Forum 2 05-30-2005 11:52 AM
knock sensor? CAJUN_YJ YJ Wrangler Technical Forum 2 10-21-2004 07:09 AM

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 On
Refbacks are On

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