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. |
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.
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Smoke coming from a pin hole on valve cover??
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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. |
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