LS6 intake install (no EGR) knocking on start??
02-02-2003, 03:39 PM
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LS6 intake install (no EGR) knocking on start?? Well the subject pretty much sums it up. I put it in this weekend, of course removed the EGR and when I finally got it back together and fired it up for the first time it made a knocking sound. It went away after a few seconds. Is this normal?? Is it just the computer relearning and retuning stuff?? Or is it the knock sensors picking up a problem and adjusting the engine to get rid of the knocking, thereby causing me to lose HP???? Please help on this. Thanks
02-03-2003, 02:05 PM
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Re: LS6 intake install (no EGR) knocking on start?? I didn't have that problem when I installed mine <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
02-03-2003, 08:06 PM
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Re: LS6 intake install (no EGR) knocking on start?? That,s kind of stange... Is the egr blocked off? does it leak? Did it sound like a lower end knock? Has it knocked on start-up again?
02-03-2003, 09:58 PM
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Re: LS6 intake install (no EGR) knocking on start?? The EGR is blocked off and it sounded like a knock from the drivers side rear of the engine. I could not quite tell if it was high or low. Also it has not done it again. I was wondering is that what this KR is people talk about?? The engine compensating for a bad situation by robbing horsepower and retarding things in order to make the engine run ok???? Please any and all help is welcome. <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" />
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02-05-2003, 08:52 AM
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Re: LS6 intake install (no EGR) knocking on start?? 5LiterBeater: Does your car experience any KR at cruising speeds? Mine sure did when I changed to a non EGR LS6 intake. Turns out there are some pretty different timing maps for EGR and non EGR cars.
Thanks,
Richard <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Thanks,
Richard <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
02-05-2003, 05:00 PM
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Re: LS6 intake install (no EGR) knocking on start?? I wish I could say. I don't have any kind of diagnostic system here at the house. I am going to have to wait until I get it to the speed shop for some other work before I can say about the KR. As far as stuff falling in.. NO chance in hell of that happening. I am very attentive. And I had all the bolts that I started with when I finished. I wonder if the mapping for mine may be radically different and that could have been it. What if I do have KR????? 1 how do I fix it and 2 what does it do if unfixed for a few days??
