PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/)
-   Diesel Discussion (http://www.peachparts.com/shopforum/diesel-discussion/)
-   -   300SDL missing at idle (http://www.peachparts.com/shopforum/diesel-discussion/276083-300sdl-missing-idle.html)

ah-kay 04-21-2010 06:44 PM

300SDL missing at idle
 
One of the daily driver is missing at idle, the same one that need a pinion seal replace, tranny leak fix etc etc. The list goes on and on. Otherwise it is a good car. Anyway, it is missing at idle, not all the time. It seems to happen more often with a long idle, like stopping at traffic light for a while. The engine is warmed up already.

I am planning to change out the primary and secondary filters, check the hoses for air leak, and do a diesel purge. What else can I do or test to get to the root of the problem?

Any suggestions are appreciated.

barry123400 04-21-2010 08:20 PM

You could put a clear line into a container from the relief valve on the injection pump to make sure fuel is flowing out and no air first. That should indicate the fuel system or clear it.

ah-kay 04-22-2010 05:04 PM

Smoke coming from a pin hole on valve cover??
 
1 Attachment(s)
Did a diesel purge last night and it seems all is well. However, the missing idle happened again this morning. I stopped the car and lifted the hood and I saw smoke coming from a pin hole at the rear left hand corner of the valve cover, as shown in the picture. There seems to be a hole there but I am not sure it was there before or it was pierced by something inside the valve cover.

I closed the hood and drove back to the company and the idle was smooth again and car was purring like a cat. Lifted the hood and NO smoke coming from the pin hole. Should there be a pin hole on the valve cover? Where does the smoke coming from? Is it relate to the missing idle? Some stuck valves? I am puzzled.

The picture is not my car as I did not have my camera. I just pull a picture from the web for illustration purpose.


All times are GMT -4. The time now is 09:04 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website