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ArBe20

By ArBe20,
in Engines & Forced Induction

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ArBe20 Collaborator

ArBe20

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Posted

Hey all.

My car (R32gtst) has been blowing some sort of carbon out of the exhaust for a while, i think its oil (when its under boost). After a base map tune, fuel pump and boost controller i am starting to wonder whether it might be the piston rings go?

Also, since installing the fuel pump (bosch 040) and boost controller the revs appear to be surging during idle. Between about 500 and 1200rpm. any ideas what this could be?

Fuel reg is stock.

Any advice or help would be much appreciated.

Thanks

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stagpower Community Regular

stagpower

Posted
Posted
Hey all.

My car (R32gtst) has been blowing some sort of carbon out of the exhaust for a while, i think its oil (when its under boost). After a base map tune, fuel pump and boost controller i am starting to wonder whether it might be the piston rings go?

Also, since installing the fuel pump (bosch 040) and boost controller the revs appear to be surging during idle. Between about 500 and 1200rpm. any ideas what this could be?

Fuel reg is stock.

Any advice or help would be much appreciated.

Thanks

hi,,could be the rings but like many turbo cars it is almost normal, or check your intake pipe as well as if it has a like a oil blow back(oil in pipe) it could be a sign of needing a rebuild as my old r32 was..probly no good info for ya but hope it helps

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roy33 Collaborator

roy33

Posted
Posted
Hey all.

My car (R32gtst) has been blowing some sort of carbon out of the exhaust for a while, i think its oil (when its under boost). After a base map tune, fuel pump and boost controller i am starting to wonder whether it might be the piston rings go?

Also, since installing the fuel pump (bosch 040) and boost controller the revs appear to be surging during idle. Between about 500 and 1200rpm. any ideas what this could be?

Fuel reg is stock.

Any advice or help would be much appreciated.

Thanks

turbo oil seal failure possibly, and have you looked at the auxiliary air control valve in regards to the idling may need to be cleaned?

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ArBe20 Collaborator

ArBe20

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Posted (edited)
and have you looked at the auxiliary air control valve in regards to the idling may need to be cleaned?

Forgot to mention it only surges when the engine is warm. The aux air control valve is for when the engines cold isnt it?

Edited by ArBe20
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H@ME Mentor

H@ME

Posted
Posted

interesting..when u installed boost controller you made sure it is not leaking? could possbily be a dirty afm (common problem) try contact cleaner on it! possibly piston rings (hope not for you) regards hame

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MattK123 Rookie

MattK123

Posted
Posted (edited)

First off have a mate follow you and put your boot in it.

Blueish smoke - oil

black - unburnt fuel

Then go from there!

Cause ya don't want to start pulling down the motor or replacing the turbo then realizing it was just running rich on boost, or something =)

I am only new to performance side of things, but i am a apprentice mechanic wanting to fill his brain with all the info he can get.

Edited by axiom
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