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Old 02-25-2017, 04:49 PM
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bear-avhistory bear-avhistory is offline
2020 Z4 M40i
Location: Raleigh NC - USA
 
Join Date: Nov 2006
Posts: 4,560
Mein Auto: 2020 Z4 M40i
Quote:
Originally Posted by Albert Goodman View Post
The smoke is white with smell of gas, as you said. It lasts for almost 10 seconds then goes away. Dealer says this is normal on morning start up.

Think one or more of your injectors is leaking into the cylinder. Had a big go round over this with the 335is.

Took it in told them what to look for. So of course they didn't because they had no computer errors.

So they replaced a sh*t load of parts on their dime with a number of come backs. Eventually they got around to replacing a set (3) injectors & shazam no more smoke or smell.

As for the noise I don't know. Remote diagnosis is pretty hard. Would guess if its a light constant tick, tick, tick its the injectors doing their thing. Because they are injecting fuel directly into the cylinder they operate at a much higher pressure than port injectors that inject fuel into the intake runners just outside the valves.
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CURRENT:
2020 Z4 M40i
2019 Chevy Suburban 4X4 RST 420BHP
2013 BMW 135is JB4 convt 6MT
2009 Yamaha V-Star
1998 Ford Ranger 4X4 Splash 5MT
1965 COBRA 550BHP FORD Racing COYOTE TKO-600
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480 WHP of BURBBLES
I LOVE THE SMELL OF BURNT 100 IN THE MORNING

Last edited by bear-avhistory; 02-25-2017 at 05:04 PM.
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