rocketrotary

Whenever I'm under full throttle, grey smoke billows out of my exhaust on my 88GT. It doesn't smoke any other time, so I don't think it's a piston ring. Any ideas?

Vic

LesteR723

how long has it been sinve you changed your oil?

also are you low?

HMUSN

check you coolant level.

same thing happened to me

rocketrotary

I bought the car a couple of weeks ago, but I was going to do an oil change tomorrow. I haven't checked the coolant, but that's a great idea. As far as being low, I just put oil in it a few days ago, and I know it isn't burning oil that fast.

Vic

LesteR723

my best guess is old oil or coolant. Good luck!

2 kwik

yeah it's not burning it.. it's blow by and a tad rich condition

Twisted

I say it's blowby past your piston rings. Mine does the same thing at high revs...although I wouldn't say that it "billows" so much as "puffs." I go through a quart of oil every 12-1500 miles. I bet your car goes through some oil too.

rmodel65

grey/ black smoke is a too rich fuel mixture u probably have bad o2 sensors

tmajikman

mine wreaks of the smell of fuel when I get on it, but mine does not smoke at all.

ikeybmg

Or PCV valve?