Hi all,I am new here so I will start from the begining

When I got the car It felt like a rough idle when parked or stopped
Driving home Monday the Check engine light came on
Checked for codes this is what I got
IPC U1301 History
IPM B0429 Current
IRC U1064 History
SDM B0041 History
SDM B0065

Took it to shop and they said no codes and changed plugs
Still doing it,to day light came back on and took it to AZ and said one code P0410
Brother looked under the hood and it looked like the big air hose wasnt all the way on he tighned it up and when I left for shop light wasnt on
Shop said no codes again But missing on all cylynders
Please help! The rough idle seems to come and go sometimes real noticable than other times

 

need more info

if missing should set p0300, p0301 ,p0302 etc

also should have the engine light flashing
does it miss in park
does it miss going up high
does it miss on highway

does the exhaust smell rich of fuel
is there any type of smoke

does the vehicle stall

car has been in an accident check wires for poor ground broken wires
if it set b0041,b0065

there is a wire being shorted to ground for u1301
https://www.cadillacforum.com/forum/...ad.php?t=12013