Exhaust rasp causing KR? - LS1TECH - Camaro and Firebird Forum Discussion

PCM Diagnostics & Tuning HP Tuners | Diablo | Pantera EFI
Sponsored by:
Sponsored by:

Exhaust rasp causing KR?

Thread Tools Search this Thread
Old 05-23-2002, 10:01 PM   #1
11 Second Club
Thread Starter
Bluestreak's Avatar
Join Date: Nov 2001
Location: Central Florida
Posts: 300
Default Exhaust rasp causing KR?

I've A-tapped the car about a half dozen times, for a total of about 30 miles worth of logs in varying driving conditions.

I'm not really getting any appreciable KR at WOT (about 0.5 to 1.0 degrees under WOT, where TPS>80 and FTC=22).

But... from about 1800-2800 I am seeing an average of 3.35-degrees of KR on and on-and-ff basis. It doesn't do it every time, but it does show up periodically. Also in the RPM range of 1800-2800 I have an exhaust rasp that is mostly squashed by the Dynomax Ultra-Flo muffler I have - there is still a slight rasp due to the deleted cats.

I think this may be what's causing the KR... but I want some opinions. Please chime in, and let me know any solutions you may have.
Bluestreak is offline   Reply With Quote
Old 05-24-2002, 09:01 AM   #2
TECH Regular
Join Date: Nov 2001
Location: Clarkston
Posts: 499
Default Re: Exhaust rasp causing KR?

It could be, to find out for sure, you first need to determine if you're getting real or false retard. There's a good procedure at the link below.


Sparky is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
spark tuning and KR issues LETZRIDE PCM Diagnostics & Tuning 18 09-20-2016 10:52 PM
Only 18* of timing at WOT? 0 KR. Justhereforinfo PCM Diagnostics & Tuning 7 03-15-2016 08:49 AM
Help with burst knock retard and delta air mass thunder550 PCM Diagnostics & Tuning 10 05-08-2006 03:55 PM
P0327 causes KR? 2000WS6Vert PCM Diagnostics & Tuning 26 05-21-2005 06:16 AM
is t-76 too big? cablebandit Forced Induction 14 02-19-2002 12:41 AM

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 -5. The time now is 07:55 PM.

  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: