Symptoms of KR? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Thread Tools Search this Thread
Old 12-31-2004, 04:18 PM   #1
Senior Member
True Car Nut
Thread Starter
Join Date: Jan 2004
Location: Lakeville, MN
Posts: 4,328
Thanks: 0
Thanked 1 Time in 1 Post
fantastic88 is on a distinguished road
Default Symptoms of KR?

Yesterday after 335 miles I noticed a small lag in performance. Does that mean I have KR? What are the symtoms of KR? I know it can reduce performance, but can you actually hear the knock if it gets bad enough?
fantastic88 is offline   Reply With Quote
Old 12-31-2004, 04:25 PM   #2
Senior Member
True Car Nut
Join Date: Sep 2002
Posts: 8,909
Thanks: 0
Thanked 0 Times in 0 Posts
Sol is on a distinguished road

If you hear the knocking or pinging you have a problem. With KR, you don't hear anything, because it prevents knock. It just pulls timing. You probably won't feel it too much if you have KR. I don't notice it, and I am getting some, as shown from scans.

You could feel a drop in performance because of a hot engine or supercharger. What is that called, heat soak?
Sol is offline   Reply With Quote
Old 12-31-2004, 04:28 PM   #3
Senior Member
True Car Nut
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road

I don't think you would be able to hear KR.. if it pre-detonating that bad that you can hear it in your cabin.. I think it would've blown something or damaged your engine by then. KR could definitely affect your performance.. but so does the climate. My car gets really peppy when driving thru foggy nites and morning ( guess it'* due to the humidity getting into the combustion chamber, cooling down the temp slightly and cleaning slightly in there that it doesn't pull any KR at all?

Does it do at all peddle depression? WOT and all? Has it gotten better? When was the last time you filled up or going to? Some places will sell bad gas that kills performance.. and sometimes even the good reliable sources too.. if they just had a fuel delivery done less then 24 hrs ago.. the water and sludge would be mixing and floating all over the place instead of settling down

I think the only reliable source for KR is to actually scan it in realtime
Drifter420 is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Fuel Pump Failure? Anyone have these same symptoms? 57chevythunder 1992-1999 13 08-26-2004 01:09 PM
Timing belt common symptoms Drifter420 1992-1999 20 08-02-2004 03:32 PM
harmonic balancer - (now me too) symptoms and repair billha 1992-1999 4 03-09-2004 04:59 PM
symptoms of a bad shock? LittleHoov General GM Chat 10 01-10-2004 01:29 AM
Symptoms of a head problem? 95neongirl 1992-1999 16 10-05-2003 06:14 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 05:24 PM.

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 and affiliated sites.