When I checked the sparks, I noticed that they were not blue but orange. They seem weak. Although the resistance between the three connectors are exactly what they should be. So what can cause a weak spark?

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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)