Electrical experts inside.

[LT1andDSM]

Had a charging problem at times it would be charging at 13.8v than 5 minutes leter voltage would be 9.9volts.
So I changed the alternator the next day and the car ran really roughalmost like is missing through all rpms . I have 3 Dsm's so I started swapping parts

things i did:
swapped coil pack
swapped power transistor
swapped MPI relay
Swapped ECU
swapped injector resistor
Swapped CAS

Still runs rough than I check cam timing, it lined up fine, Than I checked ignition timing I was way off the charts. Now the closest I can get is 15 degrees BTDC. What happened??

BTW, the vehicle is a 90 colt with a 4g63t in it mods are dsmlink, s16g, FMIC, walbro 190, sbr mani, ssq bov rec

 

[GVR4592]

Did you ground the timing connector? Was the car at operating temperature? What rpm does the engine idle at?

 

[LT1andDSM]

Yes, yes and 850-1000 rpms.