werid CIS-3 timing problem

[JShadzi at aol.com]

Well, one think you're finding is a quirk in the CIS3 ignition system, yes, it does have different maps for high and low octane (pinging or no pinging), even the slightest pink will send the ignition into the "regular fuel timing map", in which all timing is retarded.  Restarting the car probably solves your problem right?  That's becuase each time you restart the car is begins in the "premium ign. map" and the process starts over again.  You should try retarding the timing another degree or two and maybe richening up your CO a little.  Another strategy is advancing the timing a little so that when it does go into the regular ign. map you'll have a higher base timing.

Its kinda tricky, just keep playing around with it and see what works for you, don't worry about a little pinging here and there, these motors are tough and can handle it for the most part.

HTH,
Javad

>
>Yup, done all that. Car warm, idle at 720 rpm, mixture
>OK. I'll do more troubleshooting tonight and see what
>I can find.
>
>
>
>--- JShadzi at aol.com wrote:
>> Make sure you set your timing with the car warm, at
>> 800rpm,  and with the fuse in the FPR, have you done
>> that?
>>
>> Javad
>>
>> >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/
>> >
>
>
>=====
>-ed
>
>__________________________________________________
>Do you Yahoo!?
>Yahoo! Tax Center - forms, calculators, tips, more
>http://taxes.yahoo.com/
>