[Diy_efi] Chevy / Jaguar conversion spark knock

[Mike Worley]

If that is the case, there must be something wrong with my Sensor module
(or distributor module?).  Funny, there are no error codes and a good
whack on the block by the sensor does give me an rpm drop.  Maybe the
sensor has lost it sensitivity or the PO installed the wrong one. As I
stated earlier I cannot get it out of the block.  It take a good whack
to get it to respond.

Mike 

-----Original Message-----
From: Jeff Behrens [mailto:jwg94 at yahoo.com]
Sent: Thursday, May 29, 2003 10:32 AM
To: List for general do-it-yourself EFI talk
Subject: RE: [Diy_efi] Chevy / Jaguar conversion spark knock


I owned a 91 gmc truck tbi that called for 0 base
timing.  I ran 8 ahead of base without any problems. 
Are you running a knock sensor?  It should take out
any knock problems due to predetonation.  I purposely
set my timing to 18 ahead to test it and it corrected
fine.


Jeff
--- Mike Worley <Mike.Worley at cae.com> wrote:
> 
> Since I didn't have the Camaro under hood decal that
> specifically sited
> the base timing, I was depending on other feedback I
> got from the Web
> that the base timing should be 0 deg, ( set timing
> connector opened up.)
> I have not attempted using any aftermarket chips or
> reprogramming the
> timing maps, etc. First I just need to get it sorted
> out stock so I know
> where I am starting from.
> 
> Why would your S10 have reduced knock with base
> timing advanced more
> than spec? Doesn't that skew the entire timing map
> up causing more
> knock? That doesn't sound right. 
> 
> Does anyone have the definitive answer as to what
> the base timing should
> be for a 1991 Camaro 305 TBI?  Understandably there
> doesn't seem to be
> much interest in the TBI Camaro.
> 
> Thanks,
> Mike  
> '67 Jaguar 420 (no EFI here!)
> '86 Jaguar XJ6 (Lucas/Bosh EFI)
> '88 XJS convertible (Chevy 305 TBI)
> '02 Yukon XL 
> 
> 
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