Bad Knock Sensor - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-25-2007, 02:37 PM   #11
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jul 2006
Location: Granville, Ohio ~NEBF '07 Survivor~
Posts: 5,001
Thanks: 0
Thanked 0 Times in 0 Posts
petraman is on a distinguished road
Default

ok, I'll give it a shot tomorrow
petraman is offline   Reply With Quote
Old 01-25-2007, 02:45 PM   #12
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

While there'* time..

Please share with us how it was found to be bad and what diagnostics are involved to tell if a knock sensor is bad. There are so few failures that I don't remember seeing a good method to determine good/bad.
BillBoost37 is offline   Reply With Quote
Old 01-25-2007, 03:47 PM   #13
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jul 2006
Location: Granville, Ohio ~NEBF '07 Survivor~
Posts: 5,001
Thanks: 0
Thanked 0 Times in 0 Posts
petraman is on a distinguished road
Default

The guy just scanned it and told me it was a bad knock sensor. My mom wanted me to take it in to get the tranny looked at and while it was there it was scanned, and he just told me that it was a code 42 and that it was from a bad knock sensor. Should I trust him?
petraman is offline   Reply With Quote
Old 01-25-2007, 04:08 PM   #14
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

I'd check my FSM when I get home, but my dad has them. I think my brother had this code back when and I think it was narrowed down to the ICM, which we found was bad. (Car ran bad/didn't start a lot.)
J Wikoff is offline   Reply With Quote
Old 01-25-2007, 05:03 PM   #15
Senior Member
True Car Nut
 
Join Date: Nov 2002
Location: Texarkana, Texas
Posts: 6,041
Thanks: 0
Thanked 0 Times in 0 Posts
Damemorder is on a distinguished road
Default

DTC 42 is the white wire to the icm or the PCM.

DTC 43 is the KS.

(for '93)
Damemorder is offline   Reply With Quote
Old 01-25-2007, 07:53 PM   #16
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

If it is the knock sensor, here are some things to remember when changing it. It is a fragile part; don't drop it. They must make a ground on the threads to function properly, but must also seal against coolant leaking. The new sensor should come with a band of sealant past the first few threads. If not, when you apply thread sealant, keep the first few threads clean so the ground will be made OK. Torque on these is light - something like 12 lb-ft. If you overtorque them, you can damage them.
bill buttermore is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Bad, bad, bad, bad vibrations.... SilverSleeper8704 2000-2005 11 07-30-2010 06:42 AM
knock knock knock L27Buick 1992-1999 7 09-17-2004 04:23 PM
Knock Knock, engine knock? Spiral 1992-1999 5 05-23-2004 10:08 PM
KR without Knock> Not even false knock? streetracer Performance, Brainstorming & Tuning 1 08-18-2003 02:08 PM
Knock Knock Tamara 1992-1999 11 01-31-2003 05:26 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off



All times are GMT -4. The time now is 12:34 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.