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2G White smoke

Rgst99

Probationary Member
13
1
Oct 28, 2021
Twin Falls, Idaho
Ever since it bought my 2g gst 1 years ago it would throw out white smoke after a few minutes idling, I checked for shaft play on the turbo and there was none, last month I threw in a 16g turbo for more boost, while replacing head gasket, timing belt, water pump, all maintenance I was suggested to do on this group and research, so my question is the following. The car is still throwing out white smoke, any ideas?
 

TheDude236

Proven Member
180
83
Mar 15, 2021
Kingston Springs, Tennessee
Is it smoking while you drive, or is it only blowing white smoke on startup? Do you live in a cold area?
From my experience, my car does this as well when I start it and its below 32F outside, but the smoke doesnt last too long and goes away once the engine reaches a higher temperature (about halfway to operating temp). I also re-built the engine with new headgasket, 14b, and forged internals.
 

Rgst99

Probationary Member
13
1
Oct 28, 2021
Twin Falls, Idaho
I live in Idaho so we do have single digit tempatures, in the summer when I had the stock turbo it would smoke on idle, after getting to operating temp, but not while driving, only on stand still idle. Since I put the 16g on, I haven't ran it very much but it seems to be smoking also on stand still idle before getting to operating temp, but not while driving.
 

TheDude236

Proven Member
180
83
Mar 15, 2021
Kingston Springs, Tennessee
When you were running it in the summer had you replaced the headgasket? Did the car seem to be running lean maybe?
Also, fill out a vehicle profile so others can maybe help out. I know you said 2g-gst but it still helps.
 

Rgst99

Probationary Member
13
1
Oct 28, 2021
Twin Falls, Idaho
I hadn't, I just did that last month.... I'm new to dsms or turbo cars in general, how do you know when a car is running too lean or rich? Ok I’ll do that too thanks
 

TheDude236

Proven Member
180
83
Mar 15, 2021
Kingston Springs, Tennessee
Its fairly hard to do without a AFR (air fuel ratio) gauge, but since you just put on a 16g I'd assume you did nothing with the fuel system, or tune it, etc.

Putting on a bigger turbo causes an issues known as "Fuel Cut". The stock ECU isnt used to seeing the amount of airflow in the engine with the bigger turbo, so it cuts fuel to the engine at around 5-6k rpm's to prevent damage. Best way to fix that is to get a black box ecu or a Eprom, with a bigger fuel pump (and bigger injectors if you wanted to). Both of those ECU's are tunable (eprom is better than black box) and you can program the ECU to fix fuel cut, and generally that can fix the smoke issue as well. Plus you can adjust your fuel ratios.

I'm new to cars as well, and I certainly dont have as much experience as some of the other guys on here, but this is from my experience. My car is experiencing fuel cut right now and I'm only running a 14b.

To be honest, there is a chance I'm wrong as well. It can be a lot of different issues that I haven't even experienced yet. If I were you, take a second to look through the different "White Smoke" articles that are recommended to you under my response and see if those help.
 

luv2rallye

DSM Wiseman
8,182
1,018
Jun 7, 2003
Minneapolis, Minnesota
White smoke is always burning coolant in one of the cylinders. So you've got a leak either in the head gasket or a turbo coolant seal/housing crack. Doing a coolant pressure test will help identify where it is.
 
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