[GNRacer]

I have a 1987 GN that i just bought... When i have the car on it has white smoke...and it sometimes it backfires when i take off with the car. I am rarely new with the GN's...I just finishing changing the MAF, Fuel Filter, and sprak plugs...The person that owned the car before me has a chip in it... Not sure which one it is though... What could be the problem to the white smoke????

 

[Turbo_Tim]

Seeing this at night? Sometimes normal exhaust appears heave white in the headlights of the car behind. How does it run otherwise?

 

[GNRacer]

Well when i start cruising without using any boost my car starts leaving a huge trail of smoke and the car smells like gas. Then when I take off with some boost it will go fast and then make a pop sound and then the boost will continue. Also it will chug in first gear.

 

[Toadie's T-Type]

I thought a blown headgasket/antifreeze mixture caused white smoke.
Am I right Steve?

 

[salvageV6]

Quite possibly a turbo oil seal.

 

[Carolinaturbot6]

White smoke is usually attributed to:
1)Coolant burning from a leaking head or intake gasket (suggested by Toadie)
2)Normal carbon buildup in the motor
3)Turbo seal (suggested by salvageV6)
4)Cracked head (worst case scenario

)

Backfiring is normally a plug, coilpack, or ignition module problem I believe. Someone can correct me on this if I'm wrong. What plugs did you use? Gap? What maf?
A coolant pressure check may be a good place to start. You may consider pulling the plugs one by one after warming up the car & look for any steam coming from the plug holes. Evidence of this could possibly be a leak in that particular cylinder. A compression check may be done at the same time.

Have you been able to purchase a scan tool yet? The readings from them can really help you when diagnosing problems & tuning the car. Let us know.