Smoke out of Manifold and White/Blue Smoke out of Exhaust

[vpr131]

Hey guys,
On one of my other threads I was saying that I now have smoke coming out of the manifold and mostly white smoke with a blue tint coming out of the exhaust when I start the car up. I know the majority of the time its a bhg but I have an hks mhg that was installed not too ago and torqued down also. any thoughts or opinions are appreciated, thanks.

 

[Turbo Habanero]

Does it smell like burnt oil?

Also did you machine the head and block when installing the mhg?

 

[cmoser18]

Is it continuous or just on start up? Did you have the head and/or block milled before the mhg was installed?

 

[radiod]

Was the head hardness tested?

 

[vpr131]

Yes, the head and block were machined when the mhg was intstalled. And yes the smoke is continuous When revving, there is much more smoke.

 

[Turbo Habanero]

And the smell of said smoke ?

 

[vpr131]

yeah it smells like burnt oil a little bit, but no that much.

 

[vpr131]

And the air fuel ratio is around 10-11 at idle...

 

[Turbo Habanero]

That's definitely part of your problem if not all of it...

Afr should be 15-16 at Idle

 

[vpr131]

Oh I know, I recently had it tuned though and it was around 13-14 but all of a sudden this smoking started to occur and now it's smoking like I said. I've had some cooling problems lately and i think I have a heater core leak.
Could that be part of the problem?

 

[jonahs_supra]

what are you using as far as a tuner? piggyback or standalone?
13-14 at idle is to rich...
mods?
check turbo shaft play?

 

[MKIIISupraGuy]

I thought 13-14 at idle was normal ?

Sent from my DROID X2 using Tapatalk

 

[Turbo Habanero]

My idle is 15.5 - 16.5 unless cold start then its 13.5

 

[jonahs_supra]

My idle is 15.5 - 16.5 unless cold start then its 13.5

my idle at cold start is 14.7ish
my idle after cold start is 15.2
this is where my VF signal from ECU is happy at a 2.0 volts which at that voltage the ecu isnt working as hard to obtain its desired voltage


im using maft pro in speed density

 

[jonahs_supra]

I thought 13-14 at idle was normal ?

Sent from my DROID X2 using Tapatalk

my vf at that afr would go 0.00volts...means the afr is rich and the ecu is now pulling fuel to correct this

everycar is different...some cars vf will go to 2.2 or 2.5 volts where its happy...others like mine are at 2.00V

i see you have the lexus/550's...did you tune it first to obtain a happy VF???

 

[Turbo Habanero]

I'm not using anything to tune just the stock ecu.

 

[jonahs_supra]

I'm not using anything to tune just the stock ecu.

i thought you as well was lex/550's but with a safc???

 

[Turbo Habanero]

i thought you as well was lex/550's but with a safc???

I am on Lex/EVO 560cc

I use to run a safc 1 but sense have ditched it.

Only thing I run on my ecu now is a Apexi avc-r

 

[Cyrus]

if the smoke is blue-ish, it is burnt oil. that is usually a result of one of the following: 1) bad valve stem seals 2) bad rings 3) BHG 4) bad turbo oil seals

i think the most common is probably valve seals, followed by turbo seals. bhg usually results in coolant getting into the combustion chamber, but it can happen with oil as well. easy ways to investigate this: for BHG do compression test. for valve stem seals, and rings, do a leak down test (NOT a compression test). for turbo oil seals: look in the charge pipe between the compressor outlet and the intercooler. if there is a lot of oil in there, it is usually indicative of failing turbo oil seals.

white smoke = burning coolant/water = BHG, or cracked head, or cracked block.

black smoke = very rich a/f mixture.

 

[Turbo Habanero]

Although the above stated is very true. Sometimes running rich can result in some greyish colored smoke as well.