Hello, just joined. My car has been at a mechanic for 5 weeks, he just can't get it running right. I bought a "300 E Owner's Bible" book,(pub by Bently) that seems to be very good. They suggest the Bosch ECUs can go bad...?
He's replaced the O2 sensor, eng light is not on. There isn't that much to check. It will burn through a tank of gas in 100 miles...eeek !
If we lean it out, idles very high 2000 rpm. or won't restart. So, anyone have similar problem ? '91 CEs had the newer 4 valve per cyl engine.
Can anyone suggest a good source for ECUs ?
All help is very much appreciated.
Thanks in advance.

 

Hi Tom
You should contack Jayare on the Benzword.org, click on the 124 forum. He has one of these and has made over 1700 posts. Sure helped me on my problems. Tell him Smedley said Hi.

 

Thanks Smedley, I will.

 

one side of the fuel distributor (shows toward the fire wall) there is a valve with 2 torx screws on it. (with a plug with 2 wires) this valve is ur problem.

 

That part EHA / I think has been replaced with a new one. I also put a new water temp sensor in, no change. "Jayare" has been very helpful. Still running rich...running out of options....looks like fuel dist is next...ouch.
Tom

 

ur right,nothing left than the fuel distributor. u can get a rebuilt one,the brand new is kinda exp.