Ok soooo my car was backfiring yesterday idk y but Imma change spark plugs flush whole system of fluids and problem take apart my dash to figure out why its saying no bus check computer last night nothin rong so all in all I think my cats r clogged or I just need new cat .this no bus thing is really annoying cause everysince this no bus **** I somtimes have to push gas to pretty much get it started.
If someone has had this no bus problem can u make a video on how u fixed or or just take pics where this plug is under my dash

 

Crank Position sensor.

 

I just had brand new crank sensor installed 5 weeks ago

 

I just had the crank sesnsor replaced like 5 weeks ago

 

this is a long shot, but if you know anyone that has 2000 or 2001, see if you can use their ecu for a minute to see if it's the ecu. replacing parts blindly can cost you a lot of money. is it your DD?