Knock, Rattle or WHAT???
05-03-2003, 03:15 PM
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Knock, Rattle or WHAT??? This is driving me crazy.
Every once in a while when I punch it on a WOT run, I would swear that it knocking, BUT EFI is not registering any knock.
I feel no power loss, there does not appear to be any timing pulled. Nothing.
I replaced the valvetrain with rev double springs, ti retainers, and tr pushrods. After 5k on them, I pulled the covers and just went through and retorqued the rockers just to be sure. So would assume that there should be no valvefloat.
If anyone has any ideas how to isolate what this is.
It usually happens only between 4000-5500, above that its nice and smooth.
Every once in a while when I punch it on a WOT run, I would swear that it knocking, BUT EFI is not registering any knock.
I feel no power loss, there does not appear to be any timing pulled. Nothing.
I replaced the valvetrain with rev double springs, ti retainers, and tr pushrods. After 5k on them, I pulled the covers and just went through and retorqued the rockers just to be sure. So would assume that there should be no valvefloat.
If anyone has any ideas how to isolate what this is.
It usually happens only between 4000-5500, above that its nice and smooth.
05-03-2003, 04:54 PM
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Re: Knock, Rattle or WHAT??? I can't remember for sure but I seem to recall reading somewhere that these motors do have a knock from the factory on some of them, and I believe it was the #2 cylinder that the bore was a little too big??? I don't recall for sure, but maybe somebody else will chime in??? Anyways, my suggestion is to do some research on this...in fact I need to too, because I'm starting to get a valve tick at idle...hope this helps
05-10-2003, 11:07 AM
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Re: Knock, Rattle or WHAT??? FINALLY EFI recorded KNOCKs.
Yes I know thats not good, but to thats easier to fix then valves which were the only thing left.
I updated to the latest revision on EFI today, and pulled open my runs, and sun of a b*tch, there they were plain as day. Little spikes on the knock graph.
Now the fun of working them out.
Yes I know thats not good, but to thats easier to fix then valves which were the only thing left.
I updated to the latest revision on EFI today, and pulled open my runs, and sun of a b*tch, there they were plain as day. Little spikes on the knock graph.
Now the fun of working them out.
