werid CIS-3 timing problem

[Jim Green]

--- ed armstrong <edshred2000 at yahoo.com> wrote:
> Hi
>
> I've run into a wierd CIS-3 ignition timing problem
> on
> my 90tq conversion. The thing is that when I set the
> initial idle timing to 6-7 deg BTDC, after a drive
> around the block it is retarded, I not sure quite
> how
> much, but at least 7 degrees.
>
> If I put in the fuse on top the fuel pump relay as
> the
> Bentley calls for (for checking idle timing) the
> timing comes back to 7 BTDC. Its like its switching
> between timing maps or something !
>
> Any ideas on this one ? The car does at times seem
> sluggish off idle as one might expect for retarded
> timeing.  Other times it seems OK.  I should mention
> this engine is 8.5:1 compression unlike the stock
> 10:1.
>
> Some other diagnostics. Idle is fine at 730 rpm, no
> vacuum leaks, no knocks or pings, decent 91 octane
> gas
> used, knock sensor seems OK, no error codes.

Check that there throttle switch thingy's
wiring/operation.  CIS III get pissed off very easily,
you probably have something wired or hooked up wrong.
Did it just start, or have you had it working well before?

=====
Jim Green
'89 90tq 034EFI, Haltech IG5
http://www.geocities.com/jeg1976/car_home.html

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