my buick grand national blows blue smoke after you coast for awhile and then get on the throttle again but it goes away after a big puff and then is fine sometimes at idle it will puff blue smoke.
Hello, use google to determine your problem and solution. Type in my car has blue smoke and it will explain why you get blue smoke. Good Luck, DaCobraman Broward Auto Mall www.bam427.com
You might have either, worn piston rings, worn valve seals or PCV issues. I would do a compression check on your engine. This will tell you much about the condition of the internals of the engine. Look for compression evenness more than a specific number. PCV valves are inexpensive and easily changed.
Sounds like your turbo,,since it emits blue smoke AFTER coasting..Have your seals checked...
Looking for a Used Grand National in your area?
CarGurus has 1 nationwide Grand National listings and the tools to find you a great deal.
Search Buick Grand National Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Buick Grand National Experts