Good Morning. Just finished an upper end rebuild on my '75-911s. Upon starting, the idle surges and the exhaust emits whitish smoke . Sometime the smoke goes away not to return until the next startup. Other times the smoke stays for 5-10 minutes. the bottom end looked good with the original cross hatching in the cylinders intact and not worn down. Also, the vent in the air cleaner does not show excessive blow-by. The bearings were replaced and the case was line bored. Cam gear was replaced.
The car runs very strong except for these issues. Any ideas. such as 02 sensor, heat temp sensor or idle control valve? Fuel regulator and fuel distributor were both replaced. pressure regulator springs were replaced although spring sizes were different than the stock parts. Could the big oil tank on the right be draining back into the motor and overfilling it?
H E L P!
