[Diy_efi] Chevy / Jaguar conversion spark knock

[Scott Pearson]

When you're changing the base timing, are you also changing it in the EPROM?
I had a 305 powered S10 in the other day that had the base timing set at
"0", set it to the 6 deg advance that was specified and the knock went away.

- Scott
----- Original Message -----
From: "Mike Worley" <Mike.Worley at cae.com>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, May 28, 2003 12:27 PM
Subject: [Diy_efi] Chevy / Jaguar conversion spark knock


> I have been struggling with a resolving a spark knock in my now Chevy
> powered Jaguar convertible.  The engine and computer / harness is from a
> 1991 Camaro.  Its a 305 TBI.  Even running at -4deg retard base timing I
> still have spark knock upon even light acceleration (when warm).  The
> sensor doesn't seem to catch it.  There are no error codes showing up
> and I do seem to have some RPM drop when doing the bang on the block
> test.  I wanted to remove the sensor but due to the close quarters I
> cannot seem to break it free.  Its stamped steel construction doesn't
> lend its self to much muscle and every thing seems to slip.  I have do a
> spare and was wondering if there is alternate spot to mount it on the
> Chevy block or intake???  I guess what's more important would be why is
> knocking in the first place...  The engine runs strong, is tight, good
> compression and only 45K miles.   Does anyone have the correct part
> numbers for the sensor and associated signal conditioning amp for the
> 350 TBI engine.  I want to make sure the right parts are installed.
>
> Mike
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