Fuel tuning...

[Bruce Plecan]

-----Original Message-----
From: David A. Cooley <n5xmt at bellsouth.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Sunday, March 14, 1999 2:55 PM
Subject: Re: Fuel tuning...


Well, the bone white is OK for a low po application,
The flecks might be a indication of detonation, so first try less timing..
The brown area, is the fire band,
your descriptions of the black might be carbon deposits flaking off.
Might try seeing where the timing is during cruise, might be having a trace
detonation problem.
  These are the areas/problems with using acoustic knock sensors, and why I
harp about trying to get Ion going again.
Bruce

>Looked at the plugs... they were bone white like they should be...
>Took off to get the car up to operating temp and made a long 50-100 blast
>up the freeway.  Killed the ign and coasted to the offramp (goes right to a
>gas station at the end) coasted under the canopy and pulled the #1 plug...
> Looks very bone white with tiny brown/black fine speckles all down it...
>there is a faint brownish/black ring right at the end of the insulator
>where it ends and the center electrode comes out.
>Anything special I should be looking for?
>Thanks ,
>Dave
>
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>           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
>     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
>       I am Pentium of Borg...division is futile...you will be
approximated.
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