No knock, knock

[Andrew F. Gunnesch]

On Oct 23,  6:09pm, Bruce Plecan wrote:
> -----Original Message-----
> From: Andrew F. Gunnesch <afgun at mongoose.dearborn.sgi.com>
> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> Date: Friday, October 23, 1998 5:48 PM
> Subject: Re: No knock, knock
> 
> 
> >I have a '165 ECM for my TPI motor.  I believe that I'm getting knock, but
> >the knock sensor and/or ESC module not detecting it.  Anybody have some
> >good diagnostics to determine this?  I've revved the snot out of it in
> >neutral like someone suggested, but no knock shows up on my Diacom.  No
> >codes stored either, so it doesn't think the knock sensor is bad...
> >
> What makes you beleive your getting knock?.
> Nothing on diacom, and no codes, I'd think things were OK.

I hear what appears to be knock when I'm getting on it over 4000 RPMs.
There's not huge clouds of black smoke out the tailpipe like I get from
my camaro when it pings, but there's a little, and it sure sounds like a
coffee can full of marbles rattling until I back off.  ANy way to tell
for sure?