I have a '99 GP GT w/ 3800 Naturally aspirated. All stock except air filter. I put in a K&N drop-in.
For quite a while now, it's been idling funky and stalling at times. The SES light wasn't on initially, but is now and indicates a MAF input low code. I have not pulled and MAF but a prior service shop did and cleaned it before the SES light came on.
Friday, it died when I went to lunch. When I tried to restart it, it ran really rough for a few seconds and blew white smoke out the exhaust. It seemed to clear itself up and return to normal after a minute or so.
Saturday night, it did the same thing. I let it idle for a bit. The white smoke was noticeable, but not thick. I had an '85 blazer with a blown head gasket. I remember that being very thick white smoke even at idle. It seems to drive ok, but the coolant low light is now on and my oil level is about a quart low.
I had the oil changed about 6000 miles ago (prob. 1-2 months) and had Synthetic put in. The oil looks dark, but not milky. I've had the plenum and lower intake gaskets replaced already and Dexcool was removed quite a while ago.
I've got about 206K on the car. I should add that it has NEVER overheated on me since I've owned (since about 35K miles). When the upper plenum was replaced about 3 years ago, the engine did lock up due to coolant in the cylinder, but has been fine since.
My hunch is that my head gaskets are starting to fail since the intake gaskets have already been replaced.
Thoughts?
Thanks in advance.
