Thanks.
I left an important thing out since I did not think it would be related to no starting (duh).
My friend installed a new iginition lock unit, we put the old tumbler on. As he was doing this I was busy with cleaning the engine TB and ICV. Once this was done, when we cranked the engine it would not start. Is it possible that the new ignition must be installed with a new tumbler?

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Zorin

'88 Benz 420 SEL
'79 Porsche 911SC ('87 Carrera Engine)
'00 BMW 540 Sports Package
'99 Land Rover Discovery

86 300E - Manual (sold)
88 260E (sold)
84 944 (sold)