A few days ago my car developed a terrible viration at idle. When I say terrible I mean holding my steering wheel is like holding onto a jack hammer. It's very apparent when I put it into reverse and a little less so in drive and N. This morning I started my car and the idle speed was going up and down, speeds up for a second, then slows, speeds up, slows.................what the Hell is going on? This is all I have done. I did a purge, which for the first time turned the lubro moly BLACK, checked for air leaks under the hood and under the car. Checked flex disc's, and support bearing (look fine to me), I also checked the motor mounts, they need to be changed but are still doing their job based on visual inspection and the engine does not move when I shut down or give it fuel while braking while in drive. This condition happened "overnight" and was not a gradual onset. The "surging thig, if that what it was kinda freaked me out. Ideas?

Thanks

__________________
Rich B

1983 300D Turbo
205k

Excuses are crutches for the weak

Do a search on the rack dapener bolt -its on the back of the injector pump -adjusting it or updating it might help. Good luck .

I messed with that too, no change at all.

__________________
Rich B

1983 300D Turbo
205k

Excuses are crutches for the weak

damn

__________________
Rich B

1983 300D Turbo
205k

Excuses are crutches for the weak

If you do not know when the valves were last adjusted check for clearances. Also to narrow this down faster gravity feed the injection pump with another fuel supply.

You cannot always see an air intake point by watching for the presence of diesel fuel. An otherwise dry appearing point can intake air. Watch for a stream of bubbles being processed through the primary filter as well.