Exhaust rasp causing KR?
Thread Starter
11 Second Club
Joined: Nov 2001
Posts: 300
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From: Central Florida
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.
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.
TECH Regular
Joined: Nov 2001
Posts: 499
Likes: 0
From: Clarkston
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.
www.installuniversity.com
Mark
www.installuniversity.com
Mark
