werid CIS-3 timing problem

[ed armstrong]

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.

=====
-ed

__________________________________________________
Do you Yahoo!?
Yahoo! Tax Center - forms, calculators, tips, more
http://taxes.yahoo.com/