When I start my 88 Trans-Am 305 Auto, there is a giant puff of blue smoke- when starting cold or hot, but it doesn't blow any smoke during normal running conditions. The smoke smells alot like gas. Could it be valve seals? why would it smell like gas? thanks for your input.

 

Nice car by the way a very good choice.

blue smoke is usually oil and yes It could be your valve seals.
however if you smell gas I think it could be a leaky injector.
if it doesnt also smoke at WOT I would say it is your seals.

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88 WS6 T/A 305 TPI--
K&N,Air foil,hypertech chip, thermostat+fanswitch
free mods, dynomax catback, urethane motor+trans mounts,
SSM SFCs, Bilsteins
very trick homemade ramair, Accel 300+ ignition system.
Planning: hedman 1-5/8 longtubes, NOS 150 plate, world 305 heads, replace the "peanut"! and other susp. mods.
check it out at:
http://www.geocities.com/transam617

 

You use synthetic oil? I've noticed in my 88 GTA that with out synthetic it puffs blue when it starts but with it it doesn't.. Kinda strange but ya know....

Jess

 

thats cause synthetic oil combusts differently than regular dino oil. but the puff of blue smoke on start up is bad valve seals.

 

Actually, synthetic oil is just molecularly perfect. It can slip past seals that regular motor oil cannot. That's why sometimes car that use synthetic oil leak oil when regular oil in the same car will not leak.
Rob

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Rob P
89RSconvtZZ4TPI Edelbrock Intake
SLP Dual Cold Air Intake 1 5/8" Headers Semi-Siamesed Runners, IROC
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92Z28convt5spd (stock)
71Impala convt 402BB
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