1. Your car might be running a little lean . (check output at the diagnostic port) or
2. The ignition coil might be not as healthy as it should be.

__________________
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)