I went out and did a recording this morning of my new tune , with the R4 . I started the recording in 3rd gear [AT5]at 3,000rpm . As got up to about 6,000rpm...white smoke poured out the back and lasted only about 300 to 400 rpms . When I noticed it I had all ready got up to about 6,700rpm and it had stopped . When I look in the rear view I could see about 50 feet of dense smoke and it just stopped . I went home thinking I had blown the motor ,or a pistons rings [still may have ] I looked at the recording . And noticed that at the same time boost had gotten to 7.8 at 6,200rpm as it should, but then started to drop off all the way to 7,000rpm . I want to go out and see if it does it again , but Im a little scared to try .Any one have any idea what happened or any ideas of what to check ?.....Bill

 

On the recording I noticed as the boost dropped off it started to pull less timing out above 6,500rpm . So I went back and pulled the same timing as if it was at 9.5 psi and 7,000 . So after after 5psi and 7,000 Im pulling timing by rpm rather than boost .And any thing less 7000rpm , its pulling timing by boost

 

was it REALLY white...or kinda grayish. Oftentimes, on a shift, or when you first go WOT, you might get a blip of smoke which is normal. Get a comp check to make sure.

 

It was real white and it came out the exhaust at around 6,200 rpm to 6,400rpms and then just stopped . After that is when the boost sarted to drop off . The smoke trail was about 4 or 5 feet tall and as wide as the road [2 lane ] it was about 50 to 100 feet long , dense white smoke

 

I went out and did another recording . 3rd gear from 3200rpm to 6,300rpms...not smoke this time . Was a little afraid to take it higher . Looked at the recording and it built boost all the way up 7.6psi...a little lower, but I got into boost later on this recording . Im going to put it up on stands and check a few things tomorrow . Then take it in and have a comp check done .

 

Dense white smoke means water/oil mixing in the combustion chamber, likely due to a blown headgasket...but it could be other things. Check your oil via dipstick. See if it looks normal or like a chocolate milk-shake. If you see water in it, you've blown a gasket.

 

Thats the first thing I did..looks good

 

booger your scaring me man! That's really odd that it would do it and then just stop. I agree with the comp test. Hope everything's good.

 

I got under the car today .I found oil on the pan under the blower , and in a few other places on the drivers side of the motor . Makes me feel a little better . But I have no idea where its coming from. I looked at every thing I could . I took off the filter on the crank case breath hose....no oil....followed it up to where it connects to the motor under the throttle body...its still hooked up . I see oil on one bolt for the AC unit . I see oil in several different spots .Some thing spewed oil all over [once] and hasnt don it again . I have no idea where it came from.....any idea's ?????????????? Help!!!!!!!!!!! still going to do a comp check thursday

 

It could be oil but white smoke is almost alway water in the combusion chamber.
The head/s may be lifting under high boost (bolt stretch) but the gasket/s may not be totally gone yet. I have seen this happen on a turbo bikes being dyno'd. The tip off is immediate bubbling into the overflow container. If that's what happened the head gaskets are toast. Hope not!!

 

When it happened . I was going about 90 to 100mph . SMoke did come into the interior , thats when I noticed it . I looked back and seen heavy smoke about 100 yards back . I checked the dip stick....no milky color.....just good clean oil

 

If oil is coming into the interior then it must not be coming out of the exhaust. Wouldn't that normally be the water/oil indicator only if it came from the exhaust?

 

Yes ....This has got me confused all right .I was under the car for an hour looking to find where it came from . You can just tell that some thing spewed oil out for just a second and stopped . Glen Evens comment has me worried . that it was the head gasket . Will find out Thursday

 

I will also take a guess based on what you have explained... BHG. Only because you said this is a 5AT and that you are boosting over 8psi and have a torque converter.

Every Z or G that is running that much boost and has a HS torque converter has run hot in the summer. Adjustments needed to done for mine. Did you by chance notice the temp gauge? Does the car overheat still? If its not overheating it may be more serious? How does the car idle? Are you losing a lot of oil?

 

The car has never gotten hot . Isnt running hot now ..Car is idling and running fine . Even did another run thru 3rd gear [6,300rpm ] later that day . Ive checked the oil every time I have driven the car , looking for the milky color oil .I can rev it up with nothing at all coming out of the exhaust . I looked into the BOV for oil in there [none ] No oil coming out of the crank case breather hose . NO oil on the return oil line for the SC or the supply line. Its going in to have a comp check in the morning and see if they can figure it out .

 

If the car is not running hot, then I think you can eliminate the blown head gasket theory, unless it is a small leak that is getting bigger. (Which I doubt)

I would drive it around a little more. If it is problem with the oil, checking the dip stick probably wont show signs until you have drivin it a while.

Have you checked the blower? Did you hear any noises or only see smoke? How does the car feel? Does it feel weaker? Are you boosting less? How much less?

My second guess is that you blew an ic hose or other pipe leading to the SC and your car is just running rich. This is the best case scenerio and could be very possible. It doesn't explain some of the oil you have seen in various places but could cause white/light grey smoke. This happened to me on my supra.

 

Like I said , I did another run the same day it happened , in 3rd to 6,300 rpm's....boost was 7.3 but I didnt get into boost [WOT] till I had passed 3,500rpm . SO I think thats why it wasnt in the 7.6 to 7.8 range as normal . No smoke what so ever on that run . The blower [ or jackshaft] could be going Its making more noise than normal

 

The blower [ or jackshaft] could be going Its making more noise than normal
=================

That’s one of the things that happened to me. Low boost and lots of noise from the Jackshaft. Vortech replaced my Jackshaft..

 

Have you got your car back ? Real interested to see how it runs with the new injectors . And to see what adjustments needed to be done in the fuel map to get them to work . Could you send me your maps when you can ?

 

Shop did a comp test today and all is good . They have no idea where the oil came from and all we can think of is it came out of the dip stick hole . . Trying to get the 3.5 ring and pinion in right now. ANd that is proving to be a pain in the butt .