Have another problem

[Chatmanboy]

My car now hesitates and the SES light flashes while driving. Cant figure out why its doing it. Even when im in park and rev the engine at about 3000rpm the SES flashes aswell. Nor am i getting a code. Im guessing this is a electrical problem but cant find it. Can someone point me in the direction of diagnosing this problem thanks

 

[turbo nasty]

Connection at the ECM and or Chip holder

 

[Chatmanboy]

Ecm and chips were fine...

 

[turbonut85]

Check engine harness grounds below the A/C compressor and straps to the firewall, etc.