Idk whats going on

[SUBURBAN5]

Sorry y'all idk what happened, but um it has no data link only pulls kwp2000 code nothing else . has power at the port

So you have the port and it shows kwp2000 code?

Forgot to mention my obd2 won't connect new port everything won't connect. Scanners are useless for me

You have a "new port" but it's not something you installed??

 

[SUBURBAN5]

Is this what your referring too?

 

[Schurkey]

WHAT scan tool are you using? Is it CAN-compliant?

 

[k1500 97]

So you have the port and it shows kwp2000 code?

You have a "new port" but it's not something you installed??

no I installed it wires are tight

 

[k1500 97]

WHAT scan tool are you using? Is it CAN-compliant?

Yes it is, it's a performance tool, and I've used snap on, matco still doesn't pull codes

 

[SUBURBAN5]

no I installed it wires are tight

Are you still using the factory gm black box ecm under the hood ?

 

[k1500 97]

Are you still using the factory gm black box ecm under the hood ?

Yeah

 

[SUBURBAN5]

Yeah

In that case you can download the service manuals and start to test the data port along with the ecm to determine why its not communicating. You could have a ecm issue. Now that being said until you fix that.. your going to be pissing in the wind trying to figure out the backfiring problem if you decide to tinker with timing or distributor...