'80 300se start,stall,start,stall,start,stall - PeachParts Mercedes-Benz Forum

bolomiester · #1 08-16-2009, 02:06 AM

Still not fixed. And I think I may have flubbed my dub. I picked up a used computer, which worked fine but didn't solve the problem. So I turned the EHA adjustment another 1/4 turn CW. Which seemed to make it little better but did not make the start/stall/chug-chug behavior go away.

After I readjusted the EHA, I started to reset the duty cycle. When I hooked up my meter the KOEO reading was 70%. This is a California car, and the first time I set the duty cycle I got the correct 85% reading, so I must have installed a federal computer. I replaced it with the original but the KOEO reading is still 70% and I'm having a hard time reading the duty cycle. It doesn't seem to read accurately anymore. At the moment I have the mixture set be feel and by ear, and the mileage is down from 20 to 16.

Did I damage something by installing the federal computer in the California car?

bolomiester · #2 08-25-2009, 06:44 PM

Quote:

Originally Posted by bolomiester

Still not fixed. And I think I may have flubbed my dub. I picked up a used computer, which worked fine but didn't solve the problem. So I turned the EHA adjustment another 1/4 turn CW. Which seemed to make it little better but did not make the start/stall/chug-chug behavior go away.

After I readjusted the EHA, I started to reset the duty cycle. When I hooked up my meter the KOEO reading was 70%. This is a California car, and the first time I set the duty cycle I got the correct 85% reading, so I must have installed a federal computer. I replaced it with the original but the KOEO reading is still 70% and I'm having a hard time reading the duty cycle. It doesn't seem to read accurately anymore. At the moment I have the mixture set be feel and by ear, and the mileage is down from 20 to 16.

Did I damage something by installing the federal computer in the California car?

I decided, at my local indie's suggestion, to replace the oxygen sensor. It didn't fix my start/stall/chug-chug/start/run problem, but it did allow me to set my duty cycle to 50%, and the engine is smoother and idles better. I filled it up this afternoon, hopefully my mileage will go back up to normal.