560sel dies when let off the gas
 

over the weekend i put new fuel injectors in my 1990 560sel, it runs great on the highway but when i let off the gas to coaST it dies just like that. what do i need to check? air fuel mix, timming, or idle control module? i am stumped and frustrated.

a vacuum leak will cause this , does it idle fine?

Ben

no it does not idle but for less than 5 seconds. checked the duty cycle it is at 97.6%. in the summer i had it at 49%. do not know what happened.i put a new o2 sensor on then an soldeded it together.

you may have disconnected a hose under or around the intake.

Ben

had 2 loose injector once tighten them down problem fixed.