whats up guys i just got my 89 formula 305 back on the road after needing new injectors and a big vacuum leak. anyway i noticed the car has a puff of white smoke on start up but only sometimes not all the time. it does nit matter if the engine is hot or cold it does it when cold and at running temps. after about 5-6 seconds the smoke is gone and the exhaust is back to clear and normal. The engine has 126k on it but im told this is nothing to worry about with an old engine with that many miles. i was thiking bad valve seals and guides but wouldnt that be blue smoke from letting oil into combustion chamber? or this could be a head gasket leak. But like i said it only does it sometimes not all the time. Anyway a little advice would help thanks guys. I only put 200 miles on since the new injectors could that matter

 

i also forgot to mention its tpi and the engine has a constant temp of 200 to 210 and has never over heated on me and runs very strong

 

Lol, mine smokes on the first cold start of every day, no matter what.. and it smokes for a good 10-15 seconds.. and is fine after that. It's probably valve seals.

 

my car smokes bad like that too! white/greyish smoke from tailpipes and stinks like hell! if I stand near it for too long, about 5 seconds, it feels like I may carbonmonixde poisoning.... real strong odor like when u pull a car in a garage then shut it off and u get that lingering exhaust fume smell... ;-)
my car is an 85' with only 86,000 miles .. could it still be valves like mentioned above??