m104 3.0 KE-Jetronic Sometimes won't start, smoke inside intake manifold

[szamik]

Hi.

I have quite a big problem with my w124 m104 3.0 with ke-jetronic. Usually engine works fine, start correctly, idle are alright and everything run as it should. But..

Sometimes, when I turn off the engine and I am trying to start it again after few minutes there is some problem. Engine won't start but when I relase the key it trying to catch. If it happen there is a lot of smoke inside the ke jetronic distributor and also whole intake manifold is full of smoke.

I think that there may by some problem with ignition but I don't have idea where I should start searching. I replaced CPS, distributor cap doesn't look bad, cables too.

Do you have some advice?