[jumpinjobey]

Hello everyone. I need some help! I have a 1989 560sec that dies at 2300rpm. It will run as long as I stay under 2300 rpm. It also stumbles when I make a right turn.
Your help appreciated. 138k miles.

 

[Dave D]

Could be something as simple as a plugged fuel filter if it has not been replaced for many thousands of miles.

 

[marlinspike]

I'm thinking EZL since that takes over fuel mixture issues after 2500rpm.

 

[John Rose65]

Could be faulty speed(RPM) limiter. Maybe try jumping terminals 7&8 of your fuel-pump relay & rev engine to 3000 rpm???