ECM fault?

[CSH-HQ]

Try some good fuel system conditioner (ie Quaker State/Slick 50, only stuff 
that comes inna metal can).
Has a complete tuneup been done?. All the electrical/wearable parts, at once?.
Has it been on a scope, do you own a scan tool?.
Personally I can't diagnose your car over the net,
These are just a cople thing to look at.
What shape is the O2 in, miles, was it exposed to any silicone?.
Grumpy


>Unfortunately no one answered my first post regarding what I think is ECM
>related problem in 5.7 TBI in my 1993 Cadillac Fleetwood.
>The problem is erratic or I would say unstable idle. Looks like ECM is
>leaning the mixture (don't know for sure) causing idle to go below
>comfortable level for 2..3 seconds followed by 2..3 seconds of smooth
>operation
>