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Some smoke

hehehehe

By hehehehe,
in Engines & Forced Induction

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hehehehe Contributor

hehehehe

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i got afc analog one with the knob would that affect anything and i never noticed it before as it never ever did it i notice it in the passenger side mirror are you guys sure this is safe.

also really dumb question how do you guys put those movies and pics under your user name

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dojobi Experienced

dojobi

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The one knob AFCs are essentially useless. I'd say I'm almost 99% sure that's what is making you run rich and causing the smoke. They only allow you to add/remove fuel across the entire rev range, so you cannot fine tune it. So if you are adding 5% fuel at 5000rpm (just as an example), you are also adding that at 1000rpm. Not efficient at all. To be honest, I have no idea why Apexi made it.

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rs73 Grand Master

rs73

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Posted

I got greyish smoke too :P

A couple months ago the engine made tapping noise which sounds very very similar to my old Mitsubishi Galant with valve stem seal problem :( unlike my old Mitsu where noise is still there all the way, in my skyline the noise is gone when engine is warm

But after detonation problem on a recent cruise, the cold start tapping noise is gone and hasn't come back since.... wtf????

Must be something else...

turbo seal on its way out?

is that tapping noise = turbo wheel touching its housing?

that detonation (due to over boost to 15psi) could have chipped the wheel edges so it no longer touch the housing?

I'm sure exhaust wheel still there, car can still make that much boost over 10psi (but I've turned it down to 8psi since)

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Al Grand Master

Al

Posted
Posted
Originally posted by rs73

I got greyish smoke too :(

A couple months ago the engine made tapping noise which sounds very very similar to my old Mitsubishi Galant with valve stem seal problem :D unlike my old Mitsu where noise is still there all the way, in my skyline the noise is gone when engine is warm

But after detonation problem on a recent cruise, the cold start tapping noise is gone and hasn't come back since.... wtf????  

Must be something else...

turbo seal on its way out?

is that tapping noise = turbo wheel touching its housing?

that detonation (due to over boost to 15psi) could have chipped the wheel edges so it no longer touch the housing?

I'm sure exhaust wheel still there, car can still make that much boost over 10psi (but I've turned it down to 8psi since)

If the turbo wheel was touching the housing it would whale/howl not tap.

I would actually see a mechanic and do a compression test, amounst other checks.

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wrxhoon Grand Master

wrxhoon

Posted
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hehehehe , try this go downhill a very long and steep hill stay in 4th or third gear do not touch the accelerator untill u get to the bottom when u get to the bottom of the hill eccelerate look in the mirror for smoke if u see blue smoke its u r valve stem seals . if it blows blue smoke under hard ecceleration and or high revs then its piston rings . just black smoke running a little rich but u'll get more at high rpm if running rich .

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rs73 Grand Master

rs73

Posted
Posted
Originally posted by Al

If the turbo wheel was touching the housing it would whale/howl not tap.

I would actually see a mechanic and do a compression test, amounst other checks.

Al,

My turbo squeal like a mad pig on cold.... is that normal?

When warm it doesn't....

Anyway my car is now in the "hospital" now... hopefully

nothing serious...

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