I have a 1978 Mercedes 240d with a om616. Last summer I ran a 50/50 mix of diesel and filtrated vegetable oil (down to 2 micron) and then parked the car and it sat for more than 6 months. Recently I tried starting it but to no avail. I have narrowed the problem down to the injection pump. I took off all 4 of the pipe connectors and soaked them in carburetor cleaner for a couple of days and it got rid of all the junk. I reinstalled all of them and got port 1,2,3 to squirt diesel. However, port 4( the far most to the right) still will not squirt fuel. I suspect that the vegetable oil has gelled up from siting so long and is causing something to stick. I went down to my local diesel injection shop and they said that it would cost around $1600 to rebuild the pump. I can buy a new 240d for that price. Anyways, if anyone has any experience with this or has any idea what I can use to clean out the "junk" feel free to chime in.

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