Several more thoughts since you feel you got NO v leaks
Stick to mechanical things you can adjust before you say nothing else can
be done to help with these issues
The isc ... make sure it is working like it should be
The amount of opening you have on the t b blade
The isc working correctly
The bleed screw
All three of these things kinda work together to obtain a stable idle
Also ... an unstable idle might be effected by ...........
Excessive spark at the dizzy
How far away from the OEM value of fuel pressure you run
Now ... these last two won't necessarily always effect the idle
but
The thing is ... they certainly can ... AND ... the bad thing about it is
If they are causing or are a part of the cause of an unstable idle .......
It will take a good while for it to happen as they cause
the pcm's adaptive strategy to compensate and that is
where it can take some time before you see the
happening occur.
If you do a pcm reset and things get noticeable better or worse .........
then
Over time ... things start to change for the better or worse
You know the pcm is trying to help
but
The amount of adjustment it needs to make ......
Well ... it may be beyond its limit of range it has to work with
One thing that can help with a cam that lopes a good bit is raising the
idle rpm up to at least 800.
You an find a T O N of threads on how to obtain a stable idle
so
Focus your search on NOT the pcm tuning stuff
but
Do focus your search on setting the mechanical stuff
Now ... This is V E R Y important ... about all this idle stuff :Word:
You want the pcm to help you
so
You need to know how to assist it in its ability to do it
Here is how I'd start the whole process
Ensure the isc is functioning correctly
Adjust tb blade
Adjust bleed screw
Reset the pcm
You gotta give the pcm enough time to get some reference points
You then gotta give the pcm enough time to make some changes
You just can't rush this process :Word:
I'd say if your Stang is a dd ... this could take a 2 or 3 days
and
A lot of how much time it takes depends upon .......
how much time you have spent at stop signs, stop lights, and the like
Now ... say you wanna make a change to find more improvement
*** Do just O N E change and O N E change only ***
Reset the pcm
Give it 2 or 3 days again to see how it goes
Make sense
btw ... that cam you used has been used by MANY peeps
I've seen some say it was not too bad without a tune
and
I've seen some say they finally gave in and got a tune
You got nothing but some time to loose with seeing how much good
you can do with the mechanical stuff is how I see it
Almost forgot ... Dump those breathers ... They allow un-metered air
Ensure the pcv valve is functioning correctly
Ensure you got a tight seal around the pcv valve as it can be a
source for a v leak that is easy to over look way back there at
the back of things.
Good Luck!
Grady