phase signal: checked wiring and gap. all ok. phase signal still missing at high rpm. anything else to try apart from new sensor? where to buy one?

smoke: engine smokes when revving up after being on idle. no smoke or fumes under oil cap or in breather system. compression check ok. no smoke on start up (valve guide/stem seals ok). new turbo. thinking it must be turbo oil drain pipe partially blocked, mate who fitted trbo didn't check it.

any ideas please folk?