Get a full dose of fuel treatment into it f try getting someone to blow a bit of aerostart up the spout while you try starting it. Pop the air filter & squirt it straight up the engine side.
The scv. Bit awkward but not a huge job. Made a big difference to how mine behaved. The I Drive changed the whole game again. Most of those earlier diesel navs blow black smoke as you take off. Its how they're timed from the get go apparantly. There is a you tube video that lays it out. The I...
replaced the pressure control valve on mine. Too mmuch black smoke, bit boggy down low, & wanted to stall if you didn't give it a bit trickling around in an intersection. Made so much difference I suspect the original wasn't doing the job properly from day one.
Also put an I drive in it. Change...