1990 Mazda B2200 excessive smoke on cold startup and losses power when going more than 40mph or up hills once its warm could it be the ignition coil?

Answer 1

The white smoke on cold start ups is normal for these trucks due to poor oil circulation on the top end at the valves.I suggest doing a full tune up wires,plugs,rotor,distributor cap,pcv valve, and air filter,fuel filter.I would also suggest removing the air cleaner housing thoroughly clean the carburetor with carburetor cleaner and especially the cables for the choke and throttle(I use brake cleaner on the cables).Lube the cables and choke any moving metal linkage parts with liquid wrench or white lithium grease in a aeresol can.If after doing the above it may be time to remove the exhaust collector below the exhaust manifold and clean it with brake cleaner or soak in muratic acid(use gloves) and let dry.You may have a partcially clogged exhaust collector or catalytic convertor reducing your horsepower.Start simple with the tune up items.And if you decide to to tackle the exhaust work you have to remove the exhaust manifold and disconnect the exhaust pipes underneath and two brackets to remove the collector which only can be installed or removed by disconnecting these items along with the charge air pipes that connect to the air cleaner housing.Hope this does not overwhelm you with information.Tune up should correct along with the carburetor clean up and a new oxygen sensor if way old will not hurt on cost 20 dollars for it on average.