Ferrari 348 tb: at start works on 4/6; hot at 8. Why?

I am days short to buy a 1991 F 348 tb; when off and cold and switching on engine goes at 4 cylinder (one side only?) or 6. When it's hot, beautiful 8.

The owner told me that usually he changes 1 spark and everything is fine.....for 2 months; than the story starts again.

Anyone had the same? Could it be on side of the engine with the electronics not working?
Could it be one head piston? Or injectors?

Any help welcome!

Next week, anyway, it will go to th garage for verification; but pls let me know your opinion.

Mistico

 

It could be a lot of things but it should not consistently foul plugs every couple of months, especially if it's always on the same side. Could be anything from weak spark, running rich to low compression. If the plugs are getting fouled you need to know it it's fuel or oil fouling.

 

O2 sensor dirty?

Here's an interesting paragraph from the WSM.


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