Flyalway5

I start up my car and it runs for 20 minutes the most. While the car is running smoke comes from the exhaust with a smell of gasoline. The car shakes then stalls after 20 minutes. However if I push on the gas pedal the car stays running for a little longer. When I try restarting it, no luck. I can successfully start it after 2 hours or so. There is no check engine light on.

burgca

Need more information, mileage service history etc., could be timing belt, coils, spark plugs, etc.

Flyalway5

The car currently has 140k miles on it

Work done:
Ignition Coils at 115k miles
Air mass sensor at 115k miles
Motor mounts at 115k miles
Tune Up Done at 115k miles

heespaul

Check engine oil for white foam.Sounds like blown head gasket. There are only 3 things that make an engine operate. It must have 1) fuel,2) compression and 3) spark. Diagnose that way. It must have fuel as it runs ( for awhile) It seems to have spark as it runs for awhile, So check compression. What you think is smoke may be stream or burning oil getting into a cylinder. What does temp guage look like at 19 minutes. It may quite due to high temperature. I'm not an expert. Hope it gives you a starting point. Best of luck,Paul W.

Rhabdo

My two sense:

If it's spitting white smoke and smells sweet/rich its the head gasket. With white smoke your leaking/burning coolant into your cylinder(s). Bluish/grey smoke your burning way to much fuel. If your spitting black smoke your leaking/burning oil into your cylinder(s) and your piston rings are probably needing replacement.

steelers6nj

And for these reasons and more I'll definitely purchase and extended warranty when i buy my 1995 S500 or S600 next year,cause you never know...Great looking car though,real nice...