during deceleration at a traffic light idle will raise/surge up slightly. during accelaration if I hold on 3rd head at 4k for 10 seconds then accelerating is the only time I can feel the power of the 3IM with the AA tune. I do all my own work unless Indy is necessary.
My guess is a pcv on the valve cover, disa needs to be replaced or VVT needs recalibration.
So far things I’ve replaced since I’m at 115k in mileag.
2 camshaft sensors
2 vanos selanoid
battery is good
went in for vent hose heater recall
post and pre o2 sensors repalced
reset all adaptations
fuel pump and fuel pressure regulator
new coils and plugs
water pump and thermostat
Will be replacing valve cover next, eccentric sensor
crank shaft sensor
any insight would be greatly appreciate.
Have you checked the PCV? If the PVC gets too bad then you risk getting oil into the engine and eventually into the Cadillac converter / exhaust
Update your firmware it cures the problem check my video on the rough idle fix
That could be a lot of things, vacuum leak, or bad coil pack, or even a Vanos solenoid